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NEED FOR SPEED
Realizzare siti velocissimi che caricano in
meno di 1 secondo
Andrea Cardinali
@andreacardinali
November 18...
#wcmil @andreacardinali November 18th 2017
ANDREA CARDINALI
• DEVELOPER & SEO @ T.C. INFORMATICA
• LAVORO CON WP DAL 2009
...
#wcmil @andreacardinali November 18th 2017
DI COSA PARLERÓ
• PERCHÉ è importante la velocità
• COSA significa VELOCE
• COS...
#wcmil @andreacardinali November 18th 2017
BE SOCIAL
#WCMIL
@andreacardinali
4
#wcmil @andreacardinali November 18th 2017
LA VELOCITÁ È
IMPORTANTE?
5
#wcmil @andreacardinali November 18th 2017
PERCHÉ LA
VELOCITÁ È
IMPORTANTE
6
#wcmil @andreacardinali November 18th 2017
7
SITI SEMPRE PIÙ
PESANTI
#wcmil @andreacardinali November 18th 2017
SITI SEMPRE PIÙ PESANTI
8
OTTOBRE 2017OTTOBRE 2016
2585 kB 3575 kB
#wcmil @andreacardinali November 18th 2017
SITI SEMPRE PIÙ PESANTI
9
OTTOBRE 2017OTTOBRE 2016
2585 kB 3575 kB
+990 kB in 1...
#wcmil @andreacardinali November 18th 2017
10
UTENTI SEMPRE
PIÚ
MOBILE
#wcmil @andreacardinali November 18th 2017
BASSA VELOCITÀ
CONNESSIONE
11
#wcmil @andreacardinali November 18th 2017
COPERTURA
3G/4G
NON OTTIMALE
12
#wcmil @andreacardinali November 18th 2017
13
INSODDISFAZIONE
#wcmil @andreacardinali November 18th 2017
LA VELOCITÁ
IMPATTA SULLA
USER EXPERIENCE
14
#wcmil @andreacardinali November 18th 2017
BASSA VELOCITÁ
AUMENTA LA
FREQUENZA DI
RIMBALZO
15
#wcmil @andreacardinali November 18th 2017
LA VELOCITÀ
IMPATTA SUL
TASSO DI
CONVERSIONE
16
#wcmil @andreacardinali November 18th 2017
LA VELOCITÀ
IMPATTA SULLE
VISUALIZZAZIONI DI
PAGINA
17
#wcmil @andreacardinali November 18th 2017
> BOUNCE RATE
< CONVERSION RATE
< PAGEVIEWS
=
< PROFITTI
18
#wcmil @andreacardinali November 18th 2017
+1 SEC = -7%
19
http://www.aberdeen.com/research/5136/ra-performance-web-applic...
#wcmil @andreacardinali November 18th 2017
“64% OF
SHOPPERS WHO
ARE UNHAPPY
WITH THEIR SITE
VISIT WILL GO
ELSEWHERE TO
SHO...
#wcmil @andreacardinali November 18th 2017
“73% OF MOBILE
USERS SAID
THEY’VE
ENCOUNTERED A
SITE THAT WAS
“TOO SLOW TO
LOAD...
#wcmil @andreacardinali November 18th 2017
“IF AMAZON
INCREASED
PAGE LOAD TIME
BY +100MS THEY
LOSE 1% OF
SALES”
22
https:/...
#wcmil @andreacardinali November 18th 2017
“IF GOOGLE
INCREASED
PAGE LOAD BY
+500 MS THEY
GET 25% FEWER
SEARCHES”
23
https...
#wcmil @andreacardinali November 18th 2017
“50% OF PEOPLE
WILL TELL OTHERS
IF THEY HAVE A
NEGATIVE
EXPERIENCE ON
YOUR SITE...
#wcmil @andreacardinali November 18th 2017
MIGLIOR
USER EXPERIENCE
=
MAGGIORI
PROFITTI
25
#wcmil @andreacardinali November 18th 2017
26
#wcmil @andreacardinali November 18th 2017
IL TEMPO
(CHE FAI PERDERE AI
TUOI UTENTI)
È DENARO
(CHE PERDI TU)
27
#wcmil @andreacardinali November 18th 2017
LA VELOCITÀ
MIGLIORA IL
POSIZIONAMENTO
(SEO)?
28
#wcmil @andreacardinali November 18th 2017
NI
29
#wcmil @andreacardinali November 18th 2017
UN SITO VELOCE
NON MIGLIORA
DIRETTAMENTE IL
POSIZIONAMENTO
30
#wcmil @andreacardinali November 18th 2017
UN SITO LENTO
PEGGIORA
L’INDICIZZAZIONE
31
#wcmil @andreacardinali November 18th 2017
UN SITO LENTO
PEGGIORA IL
POSIZIONAMENTO
32
#wcmil @andreacardinali November 18th 2017
“SLOW SITES RANK WORST. IF YOU
RUN A FAST SITE, THAT’S GREAT
FOR YOUR USERS, GR...
#wcmil @andreacardinali November 18th 2017
CRAWL BUDGET
34
#wcmil @andreacardinali November 18th 2017
IL CRAWL BUDGET
È IL TEMPO CHE LO
SPIDER DEDICA
ALLA SCANSIONE
DEL SITO
35
#wcmil @andreacardinali November 18th 2017
TEMPO LIMITATO
36
#wcmil @andreacardinali November 18th 2017
SITO VELOCE =
SCANSIONE PIÙ
APPROFONDITA
37
#wcmil @andreacardinali November 18th 2017
SITO VELOCE =
MIGLIORE
INDICIZZAZIONE
38
#wcmil @andreacardinali November 18th 2017
MIGLIORE
INDICIZZAZIONE =
MIGLIOR
POSIZIONAMENTO
39
#wcmil @andreacardinali November 18th 2017
COSA SIGNIFICA
VELOCE?
40
#wcmil @andreacardinali November 18th 2017
LA RISPOSTA È
NELLA
PSICOLOGIA
UMANA…
41
#wcmil @andreacardinali November 18th 2017
MEMORIA A
BREVE TERMINE
LIMITATA
42
#wcmil @andreacardinali November 18th 2017
43
#wcmil @andreacardinali November 18th 2017
VOGLIAMO
AVERE IL
CONTROLLO
DELLA
SITUAZIONE
44
#wcmil @andreacardinali November 18th 2017
45
#wcmil @andreacardinali November 18th 2017
VOGLIAMO
EVITARE LE
ATTESE
46
#wcmil @andreacardinali November 18th 2017
47
#wcmil @andreacardinali November 18th 2017
SEMPRE PIÙ
DISTRATTI
48
#wcmil @andreacardinali November 18th 2017
QUANTO POSSIAMO
ASPETTARE?
Ritardo Reazione utente
0 - 100ms Istantanea
100 - 3...
#wcmil @andreacardinali November 18th 2017
SITO VELOCE =
1 SECONDO
50
#wcmil @andreacardinali November 18th 2017
COSA RENDE
VELOCE UN SITO
51
#wcmil @andreacardinali November 18th 2017
BACKEND
O
FRONTEND?
52
#wcmil @andreacardinali November 18th 2017
<20 %
BACKEND
53
#wcmil @andreacardinali November 18th 2017
>80 %
FRONTEND
54
#wcmil @andreacardinali November 18th 2017
55
BACKEND
FRONTEND
#wcmil @andreacardinali November 18th 2017
OTTIMIZZARE IL
BACKEND È INUTILE?
56
#wcmil @andreacardinali November 18th 2017
IL 20%
CONTROLLA
L’80%
57
#wcmil @andreacardinali November 18th 2017
LE
PERFORMANCE
PARTONO DAL
CODICE
58
#wcmil @andreacardinali November 18th 2017
I PLUGIN DI W.P.O.
NON SONO LA
SOLUZIONE
59
#wcmil @andreacardinali November 18th 2017
COME RENDERE
VELOCE UN SITO
60
#wcmil @andreacardinali November 18th 2017
LA TECNICA
SEGRETA #1 PER
RENDERE
VELOCE UN SITO
61
#wcmil @andreacardinali November 18th 2017
IL SEGRETO PER RENDERE
VELOCE UN SITO
62
#wcmil @andreacardinali November 18th 2017
SITO VELOCE 
PAGE BUILDER
63
#wcmil @andreacardinali November 18th 2017
COME CAPIRE SE
IL SITO È
VELOCE
64
#wcmil @andreacardinali November 18th 2017
"
"
CIÒ CHE NON È MISURABILE
NON È MIGLIORABILE
65
Galileo Galilei
#wcmil @andreacardinali November 18th 2017
STRUMENTI
• https://gtmetrix.com/
• https://www.webpagetest.org/
• https://tool...
#wcmil @andreacardinali November 18th 2017
METRICHE
67
#wcmil @andreacardinali November 18th 2017
GOOGLE PAGE
SPEED SCORE
68
#wcmil @andreacardinali November 18th 2017
CHI È IL MIGLIORE?
69
SITO 1
SITO 2
#wcmil @andreacardinali November 18th 2017
E ADESSO?
70
SITO 1
SITO 2
#wcmil @andreacardinali November 18th 2017
CHI È IL MIGLIORE?
71
SITO 1
SITO 2
#wcmil @andreacardinali November 18th 2017
72
#wcmil @andreacardinali November 18th 2017
PAGE SPEED =
VANITY METRIC
73
#wcmil @andreacardinali November 18th 2017
4 METRICHE
74
#wcmil @andreacardinali November 18th 2017
#1
TIME TO FIRST
BYTE
(TTFB)
75
#wcmil @andreacardinali November 18th 2017
#2
KILOBYTES
76
#wcmil @andreacardinali November 18th 2017
#3
N° CONNESSIONI
HTTP
77
#wcmil @andreacardinali November 18th 2017
#4
ONLOAD TIME
78
#wcmil @andreacardinali November 18th 2017
TIME TO FIRST
BYTE
79
#wcmil @andreacardinali November 18th 2017
TTFB
80
#wcmil @andreacardinali November 18th 2017
VELOCIZZARE LA
RESTITUZIONE
DEL CODICE
HTML
81
#wcmil @andreacardinali November 18th 2017
82
#wcmil @andreacardinali November 18th 2017
RIDURRE TTFB
• Hosting performante
• PHP 7 (+ 300% web performance)
• Server si...
#wcmil @andreacardinali November 18th 2017
RIDURRE IL
PESO DELLA
PAGINA
84
#wcmil @andreacardinali November 18th 2017
RIDURRE IL PESO DELLA
PAGINA
•Abilitare compressione GZIP
•Minify risorse testu...
#wcmil @andreacardinali November 18th 2017
RIDURRE IL
NUMERO DI
CONNESSIONI
HTTP
86
#wcmil @andreacardinali November 18th 2017
1 RISORSA = 1
CONNESSIONE
HTTP
(HTTP/1.X)
87
#wcmil @andreacardinali November 18th 2017
1 RISORSA = 1 CONNESSIONE
88
#wcmil @andreacardinali November 18th 2017
N° MAX
CONNESSIONI
PER HOST
(HTTP/1.X)
89
#wcmil @andreacardinali November 18th 2017
RIDURRE IL NUMERO DI
CONNESSIONI HTTP
• Caricamento condizionale (Conditional
l...
#wcmil @andreacardinali November 18th 2017
CARICAMENTO
CONDIZIONALE
add_action(‘wp_enqueue_scripts’,’crd_registra_js’);
fu...
#wcmil @andreacardinali November 18th 2017
HTTP/2
92
#wcmil @andreacardinali November 18th 2017
HTTP/2
• Supportato dall’85% dei browser in Italia*
• Migliora notevolmente le ...
#wcmil @andreacardinali November 18th 2017
DOWNLOAD CON HTTP
94
#wcmil @andreacardinali November 18th 2017
DOWNLOAD CON HTTP/2
95
#wcmil @andreacardinali November 18th 2017
HTTP VS HTTP/2
96
http://www.httpvshttps.com/
#wcmil @andreacardinali November 18th 2017
HTTP/2 - DA SAPERE
• I social counter vengono resettati
• Impostare i redirect ...
#wcmil @andreacardinali November 18th 2017
ONLOAD TIME
98
#wcmil @andreacardinali November 18th 2017
ONLOAD TIME
99
#wcmil @andreacardinali November 18th 2017
AUMENTARE LA
VELOCITÀ
PERCEPITA
100
#wcmil @andreacardinali November 18th 2017
"
"
TIME IS MEASURED
OBJECTIVELY BUT PERCEIVED
SUBJECTIVELY, AND
EXPERIENCES CA...
#wcmil @andreacardinali November 18th 2017
PRIORITÀ AI
CONTENUTI
ABOVE THE
FOLD
102
#wcmil @andreacardinali November 18th 2017
PRIORITÀ AI CONTENUTI
ABOVE THE FOLD
103
#wcmil @andreacardinali November 18th 2017
CRITICAL
RENDER PATH
104
#wcmil @andreacardinali November 18th 2017
CRITICAL RENDER
PATH È COSTITUITO
DAL CODICE E DALLE
RISORSE
NECESSARIE A
VISUA...
#wcmil @andreacardinali November 18th 2017
https://it.wordpress.org/plugins/above-the-fold-optimization/
#wcmil @andreacardinali November 18th 2017
SERVER PUSH
107
#wcmil @andreacardinali November 18th 2017
SERVER PUSH
• La priorità dei contenuti è stabilita dal
server
• Le risorse con...
#wcmil @andreacardinali November 18th 2017
SERVER PUSH
<?php
header("Link: </css/vendor.css>; rel=preload; as=style",
fals...
#wcmil @andreacardinali November 18th 2017
TUTTO QUI?
110
#wcmil @andreacardinali November 18th 2017
ASSOLUTAMENTE NO…
• Lazy load immagini, video
• Font loader
• Script asincroni ...
#wcmil @andreacardinali November 18th 2017
RICAPITOLANDO
• Il tempo è denaro
• Le performance partono dal codice
• Page Sp...
#wcmil @andreacardinali November 18th 2017
RICAPITOLANDO
• Concentratevi sul 20% che permette di
ottenere l’80% dei risult...
#wcmil @andreacardinali November 18th 2017
BONUS TRACK
114
#wcmil @andreacardinali November 18th 2017
PLUGIN - 1
CARICAMENTO ASINCRONO / DIFFERITO
• https://it.wordpress.org/plugins...
#wcmil @andreacardinali November 18th 2017
PLUGIN - 2
OTTIMIZZAZIONE FRONTEND / CRITICAL
RENDER PATH
• https://it.wordpres...
#wcmil @andreacardinali November 18th 2017
ALTERNATIVE A PAGE
BUILDER
Utilizzare ItalyStrap
• 100% made in Italy
• Veloce ...
#wcmil @andreacardinali November 18th 2017
WORDPRESS MEETUP
ROMAGNA
QUANDO:
ogni 1°Martedì del mese (prossimo 3 Dicembre)
...
#wcmil @andreacardinali November 18th 2017
DOMANDE?
119
#wcmil @andreacardinali November 18th 2017
THANKS!
• Twitter:@andreacardinali
• Slideshare:
http://www.slideshare.net/andr...
Nächste SlideShare
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Realizzare siti velocissimi che si caricano in un secondo - WordCamp Milano 2017 - Andrea Cardinali

614 Aufrufe

Veröffentlicht am

Perché è importante avere un sito veloce? Cosa significa veloce? Si può essere veloci senza usare plugins? In questo talk oltre a fornirti tutte le risposte, ti mostrerò le strategie più efficaci ed attuali che utilizzo per rendere i siti più veloci e abbattere il muro del secondo.

Veröffentlicht in: Marketing
  • DOWNLOAD THIS BOOKS INTO AVAILABLE FORMAT (2019 Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBooks .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THIS Helped Ignite a Movement,-- Atomic Habits: An Easy &amp; Proven Way to Build Good Habits &amp; Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THIS the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THIS Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Antworten 
    Sind Sie sicher, dass Sie …  Ja  Nein
    Ihre Nachricht erscheint hier
  • DOWNLOAD THIS BOOKS INTO AVAILABLE FORMAT (2019 Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBooks .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THIS Helped Ignite a Movement,-- Atomic Habits: An Easy &amp; Proven Way to Build Good Habits &amp; Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THIS the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THIS Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Antworten 
    Sind Sie sicher, dass Sie …  Ja  Nein
    Ihre Nachricht erscheint hier
  • DOWNLOAD THIS BOOKS INTO AVAILABLE FORMAT (2019 Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBooks .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THIS Helped Ignite a Movement,-- Atomic Habits: An Easy &amp; Proven Way to Build Good Habits &amp; Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THIS the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THIS Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Antworten 
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    Ihre Nachricht erscheint hier
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Realizzare siti velocissimi che si caricano in un secondo - WordCamp Milano 2017 - Andrea Cardinali

  1. 1. NEED FOR SPEED Realizzare siti velocissimi che caricano in meno di 1 secondo Andrea Cardinali @andreacardinali November 18th 2017
  2. 2. #wcmil @andreacardinali November 18th 2017 ANDREA CARDINALI • DEVELOPER & SEO @ T.C. INFORMATICA • LAVORO CON WP DAL 2009 • CO-ORGANIZZATORE DEL WP ROMAGNA MEETUP 2
  3. 3. #wcmil @andreacardinali November 18th 2017 DI COSA PARLERÓ • PERCHÉ è importante la velocità • COSA significa VELOCE • COSA rende veloce un sito • COME rendere veloce un sito 3
  4. 4. #wcmil @andreacardinali November 18th 2017 BE SOCIAL #WCMIL @andreacardinali 4
  5. 5. #wcmil @andreacardinali November 18th 2017 LA VELOCITÁ È IMPORTANTE? 5
  6. 6. #wcmil @andreacardinali November 18th 2017 PERCHÉ LA VELOCITÁ È IMPORTANTE 6
  7. 7. #wcmil @andreacardinali November 18th 2017 7 SITI SEMPRE PIÙ PESANTI
  8. 8. #wcmil @andreacardinali November 18th 2017 SITI SEMPRE PIÙ PESANTI 8 OTTOBRE 2017OTTOBRE 2016 2585 kB 3575 kB
  9. 9. #wcmil @andreacardinali November 18th 2017 SITI SEMPRE PIÙ PESANTI 9 OTTOBRE 2017OTTOBRE 2016 2585 kB 3575 kB +990 kB in 12 mesi Fonte: http://httparchive.org
  10. 10. #wcmil @andreacardinali November 18th 2017 10 UTENTI SEMPRE PIÚ MOBILE
  11. 11. #wcmil @andreacardinali November 18th 2017 BASSA VELOCITÀ CONNESSIONE 11
  12. 12. #wcmil @andreacardinali November 18th 2017 COPERTURA 3G/4G NON OTTIMALE 12
  13. 13. #wcmil @andreacardinali November 18th 2017 13 INSODDISFAZIONE
  14. 14. #wcmil @andreacardinali November 18th 2017 LA VELOCITÁ IMPATTA SULLA USER EXPERIENCE 14
  15. 15. #wcmil @andreacardinali November 18th 2017 BASSA VELOCITÁ AUMENTA LA FREQUENZA DI RIMBALZO 15
  16. 16. #wcmil @andreacardinali November 18th 2017 LA VELOCITÀ IMPATTA SUL TASSO DI CONVERSIONE 16
  17. 17. #wcmil @andreacardinali November 18th 2017 LA VELOCITÀ IMPATTA SULLE VISUALIZZAZIONI DI PAGINA 17
  18. 18. #wcmil @andreacardinali November 18th 2017 > BOUNCE RATE < CONVERSION RATE < PAGEVIEWS = < PROFITTI 18
  19. 19. #wcmil @andreacardinali November 18th 2017 +1 SEC = -7% 19 http://www.aberdeen.com/research/5136/ra-performance-web-application/content.aspx
  20. 20. #wcmil @andreacardinali November 18th 2017 “64% OF SHOPPERS WHO ARE UNHAPPY WITH THEIR SITE VISIT WILL GO ELSEWHERE TO SHOP NEXT TIME” 20 https://cdnify.com/blog/15-web-performance-stats/
  21. 21. #wcmil @andreacardinali November 18th 2017 “73% OF MOBILE USERS SAID THEY’VE ENCOUNTERED A SITE THAT WAS “TOO SLOW TO LOAD” 21 https://cdnify.com/blog/15-web-performance-stats/
  22. 22. #wcmil @andreacardinali November 18th 2017 “IF AMAZON INCREASED PAGE LOAD TIME BY +100MS THEY LOSE 1% OF SALES” 22 https://cdnify.com/blog/15-web-performance-stats/
  23. 23. #wcmil @andreacardinali November 18th 2017 “IF GOOGLE INCREASED PAGE LOAD BY +500 MS THEY GET 25% FEWER SEARCHES” 23 https://cdnify.com/blog/15-web-performance-stats/
  24. 24. #wcmil @andreacardinali November 18th 2017 “50% OF PEOPLE WILL TELL OTHERS IF THEY HAVE A NEGATIVE EXPERIENCE ON YOUR SITE” 24 https://cdnify.com/blog/15-web-performance-stats/
  25. 25. #wcmil @andreacardinali November 18th 2017 MIGLIOR USER EXPERIENCE = MAGGIORI PROFITTI 25
  26. 26. #wcmil @andreacardinali November 18th 2017 26
  27. 27. #wcmil @andreacardinali November 18th 2017 IL TEMPO (CHE FAI PERDERE AI TUOI UTENTI) È DENARO (CHE PERDI TU) 27
  28. 28. #wcmil @andreacardinali November 18th 2017 LA VELOCITÀ MIGLIORA IL POSIZIONAMENTO (SEO)? 28
  29. 29. #wcmil @andreacardinali November 18th 2017 NI 29
  30. 30. #wcmil @andreacardinali November 18th 2017 UN SITO VELOCE NON MIGLIORA DIRETTAMENTE IL POSIZIONAMENTO 30
  31. 31. #wcmil @andreacardinali November 18th 2017 UN SITO LENTO PEGGIORA L’INDICIZZAZIONE 31
  32. 32. #wcmil @andreacardinali November 18th 2017 UN SITO LENTO PEGGIORA IL POSIZIONAMENTO 32
  33. 33. #wcmil @andreacardinali November 18th 2017 “SLOW SITES RANK WORST. IF YOU RUN A FAST SITE, THAT’S GREAT FOR YOUR USERS, GREAT FOR ROI, FANTASTIC, YOU SHOULD PAY LOT OF ATTENTION TO CACHE AND ALL THIS SORT OF STUFF BUT YOU DON’T GET A BOOST FOR IT. IT’S THE SITES THAT ARE OUTLIERS IN TERMS OF BEING REALLY SLOW THAT RANK LOWER.” 33 Matt Cutts @ SMX 2013
  34. 34. #wcmil @andreacardinali November 18th 2017 CRAWL BUDGET 34
  35. 35. #wcmil @andreacardinali November 18th 2017 IL CRAWL BUDGET È IL TEMPO CHE LO SPIDER DEDICA ALLA SCANSIONE DEL SITO 35
  36. 36. #wcmil @andreacardinali November 18th 2017 TEMPO LIMITATO 36
  37. 37. #wcmil @andreacardinali November 18th 2017 SITO VELOCE = SCANSIONE PIÙ APPROFONDITA 37
  38. 38. #wcmil @andreacardinali November 18th 2017 SITO VELOCE = MIGLIORE INDICIZZAZIONE 38
  39. 39. #wcmil @andreacardinali November 18th 2017 MIGLIORE INDICIZZAZIONE = MIGLIOR POSIZIONAMENTO 39
  40. 40. #wcmil @andreacardinali November 18th 2017 COSA SIGNIFICA VELOCE? 40
  41. 41. #wcmil @andreacardinali November 18th 2017 LA RISPOSTA È NELLA PSICOLOGIA UMANA… 41
  42. 42. #wcmil @andreacardinali November 18th 2017 MEMORIA A BREVE TERMINE LIMITATA 42
  43. 43. #wcmil @andreacardinali November 18th 2017 43
  44. 44. #wcmil @andreacardinali November 18th 2017 VOGLIAMO AVERE IL CONTROLLO DELLA SITUAZIONE 44
  45. 45. #wcmil @andreacardinali November 18th 2017 45
  46. 46. #wcmil @andreacardinali November 18th 2017 VOGLIAMO EVITARE LE ATTESE 46
  47. 47. #wcmil @andreacardinali November 18th 2017 47
  48. 48. #wcmil @andreacardinali November 18th 2017 SEMPRE PIÙ DISTRATTI 48
  49. 49. #wcmil @andreacardinali November 18th 2017 QUANTO POSSIAMO ASPETTARE? Ritardo Reazione utente 0 - 100ms Istantanea 100 - 300 ms Ritardo appena percepibile 300 - 1000 ms FOCUS, Ritardo percepibile 1 secondo o più FLUSSO PENSIERI INTERROTTO Cambio contesto mentale 10 secondi o più FRUSTRAZIONE e ABBANDONO del SITO 49 [Miller 1968; Card et al. 1991] - Jakob Nielsen
  50. 50. #wcmil @andreacardinali November 18th 2017 SITO VELOCE = 1 SECONDO 50
  51. 51. #wcmil @andreacardinali November 18th 2017 COSA RENDE VELOCE UN SITO 51
  52. 52. #wcmil @andreacardinali November 18th 2017 BACKEND O FRONTEND? 52
  53. 53. #wcmil @andreacardinali November 18th 2017 <20 % BACKEND 53
  54. 54. #wcmil @andreacardinali November 18th 2017 >80 % FRONTEND 54
  55. 55. #wcmil @andreacardinali November 18th 2017 55 BACKEND FRONTEND
  56. 56. #wcmil @andreacardinali November 18th 2017 OTTIMIZZARE IL BACKEND È INUTILE? 56
  57. 57. #wcmil @andreacardinali November 18th 2017 IL 20% CONTROLLA L’80% 57
  58. 58. #wcmil @andreacardinali November 18th 2017 LE PERFORMANCE PARTONO DAL CODICE 58
  59. 59. #wcmil @andreacardinali November 18th 2017 I PLUGIN DI W.P.O. NON SONO LA SOLUZIONE 59
  60. 60. #wcmil @andreacardinali November 18th 2017 COME RENDERE VELOCE UN SITO 60
  61. 61. #wcmil @andreacardinali November 18th 2017 LA TECNICA SEGRETA #1 PER RENDERE VELOCE UN SITO 61
  62. 62. #wcmil @andreacardinali November 18th 2017 IL SEGRETO PER RENDERE VELOCE UN SITO 62
  63. 63. #wcmil @andreacardinali November 18th 2017 SITO VELOCE  PAGE BUILDER 63
  64. 64. #wcmil @andreacardinali November 18th 2017 COME CAPIRE SE IL SITO È VELOCE 64
  65. 65. #wcmil @andreacardinali November 18th 2017 " " CIÒ CHE NON È MISURABILE NON È MIGLIORABILE 65 Galileo Galilei
  66. 66. #wcmil @andreacardinali November 18th 2017 STRUMENTI • https://gtmetrix.com/ • https://www.webpagetest.org/ • https://tools.pingdom.com/ 66
  67. 67. #wcmil @andreacardinali November 18th 2017 METRICHE 67
  68. 68. #wcmil @andreacardinali November 18th 2017 GOOGLE PAGE SPEED SCORE 68
  69. 69. #wcmil @andreacardinali November 18th 2017 CHI È IL MIGLIORE? 69 SITO 1 SITO 2
  70. 70. #wcmil @andreacardinali November 18th 2017 E ADESSO? 70 SITO 1 SITO 2
  71. 71. #wcmil @andreacardinali November 18th 2017 CHI È IL MIGLIORE? 71 SITO 1 SITO 2
  72. 72. #wcmil @andreacardinali November 18th 2017 72
  73. 73. #wcmil @andreacardinali November 18th 2017 PAGE SPEED = VANITY METRIC 73
  74. 74. #wcmil @andreacardinali November 18th 2017 4 METRICHE 74
  75. 75. #wcmil @andreacardinali November 18th 2017 #1 TIME TO FIRST BYTE (TTFB) 75
  76. 76. #wcmil @andreacardinali November 18th 2017 #2 KILOBYTES 76
  77. 77. #wcmil @andreacardinali November 18th 2017 #3 N° CONNESSIONI HTTP 77
  78. 78. #wcmil @andreacardinali November 18th 2017 #4 ONLOAD TIME 78
  79. 79. #wcmil @andreacardinali November 18th 2017 TIME TO FIRST BYTE 79
  80. 80. #wcmil @andreacardinali November 18th 2017 TTFB 80
  81. 81. #wcmil @andreacardinali November 18th 2017 VELOCIZZARE LA RESTITUZIONE DEL CODICE HTML 81
  82. 82. #wcmil @andreacardinali November 18th 2017 82
  83. 83. #wcmil @andreacardinali November 18th 2017 RIDURRE TTFB • Hosting performante • PHP 7 (+ 300% web performance) • Server side cache (Nginx / Varnish) 83
  84. 84. #wcmil @andreacardinali November 18th 2017 RIDURRE IL PESO DELLA PAGINA 84
  85. 85. #wcmil @andreacardinali November 18th 2017 RIDURRE IL PESO DELLA PAGINA •Abilitare compressione GZIP •Minify risorse testuali (css, js, html) •Compressione immagini •Intestazioni http scadenza (Expire headers) 85
  86. 86. #wcmil @andreacardinali November 18th 2017 RIDURRE IL NUMERO DI CONNESSIONI HTTP 86
  87. 87. #wcmil @andreacardinali November 18th 2017 1 RISORSA = 1 CONNESSIONE HTTP (HTTP/1.X) 87
  88. 88. #wcmil @andreacardinali November 18th 2017 1 RISORSA = 1 CONNESSIONE 88
  89. 89. #wcmil @andreacardinali November 18th 2017 N° MAX CONNESSIONI PER HOST (HTTP/1.X) 89
  90. 90. #wcmil @andreacardinali November 18th 2017 RIDURRE IL NUMERO DI CONNESSIONI HTTP • Caricamento condizionale (Conditional loading) • Combine delle risorse (da valutare) • HTTP/2 90
  91. 91. #wcmil @andreacardinali November 18th 2017 CARICAMENTO CONDIZIONALE add_action(‘wp_enqueue_scripts’,’crd_registra_js’); function crd_registra_js() { $path=get_template_directory_uri().'/assets/js/’; wp_register_script(‘myscript’,‘script.min.js’); if(is_page()) { wp_enqueue_script(‘myscript’); } } 91
  92. 92. #wcmil @andreacardinali November 18th 2017 HTTP/2 92
  93. 93. #wcmil @andreacardinali November 18th 2017 HTTP/2 • Supportato dall’85% dei browser in Italia* • Migliora notevolmente le performance • Elimina le limitazioni di HTTP/1.1 • Utilizza una sola connessione per host • Scarica le risorse in parallelo • Le risorse si possono prioritizzare (server push) • Richiede https 93 https://caniuse.com/#search=HTTP%2F2
  94. 94. #wcmil @andreacardinali November 18th 2017 DOWNLOAD CON HTTP 94
  95. 95. #wcmil @andreacardinali November 18th 2017 DOWNLOAD CON HTTP/2 95
  96. 96. #wcmil @andreacardinali November 18th 2017 HTTP VS HTTP/2 96 http://www.httpvshttps.com/
  97. 97. #wcmil @andreacardinali November 18th 2017 HTTP/2 - DA SAPERE • I social counter vengono resettati • Impostare i redirect nel .htaccess • Attenzione ai mixed content • Impostare il <meta name=«referer»> adeguatamente 97 https://www.w3.org/TR/referrer-policy/#referrer-policies
  98. 98. #wcmil @andreacardinali November 18th 2017 ONLOAD TIME 98
  99. 99. #wcmil @andreacardinali November 18th 2017 ONLOAD TIME 99
  100. 100. #wcmil @andreacardinali November 18th 2017 AUMENTARE LA VELOCITÀ PERCEPITA 100
  101. 101. #wcmil @andreacardinali November 18th 2017 " " TIME IS MEASURED OBJECTIVELY BUT PERCEIVED SUBJECTIVELY, AND EXPERIENCES CAN BE ENGINEERED TO IMPROVE PERCEIVED PERFORMANCE 101 Ilya Gregorik
  102. 102. #wcmil @andreacardinali November 18th 2017 PRIORITÀ AI CONTENUTI ABOVE THE FOLD 102
  103. 103. #wcmil @andreacardinali November 18th 2017 PRIORITÀ AI CONTENUTI ABOVE THE FOLD 103
  104. 104. #wcmil @andreacardinali November 18th 2017 CRITICAL RENDER PATH 104
  105. 105. #wcmil @andreacardinali November 18th 2017 CRITICAL RENDER PATH È COSTITUITO DAL CODICE E DALLE RISORSE NECESSARIE A VISUALIZZARE IL CONTENUTO ABOVE THE FOLD 105
  106. 106. #wcmil @andreacardinali November 18th 2017 https://it.wordpress.org/plugins/above-the-fold-optimization/
  107. 107. #wcmil @andreacardinali November 18th 2017 SERVER PUSH 107
  108. 108. #wcmil @andreacardinali November 18th 2017 SERVER PUSH • La priorità dei contenuti è stabilita dal server • Le risorse con priorità più alta sono scaricate per prime (indipendentemente dalla loro posizione nel html) 108
  109. 109. #wcmil @andreacardinali November 18th 2017 SERVER PUSH <?php header("Link: </css/vendor.css>; rel=preload; as=style", false); header("Link: </css/styles.css>; rel=preload; as=style", false); header("Link: </images/site/logo--red.svg>; rel=preload; as=image", false); ?> 109 https://it.wordpress.org/plugins/http2-server-push/ https://support.cloudflare.com/hc/en-us/articles/115002816808-How-do-I-enable-HTTP-2-Server-Push-in-WordPress
  110. 110. #wcmil @andreacardinali November 18th 2017 TUTTO QUI? 110
  111. 111. #wcmil @andreacardinali November 18th 2017 ASSOLUTAMENTE NO… • Lazy load immagini, video • Font loader • Script asincroni e differiti • DNS lookup • preload, prefetch, prerender • CDN • Cache per utenti loggati • […] 111
  112. 112. #wcmil @andreacardinali November 18th 2017 RICAPITOLANDO • Il tempo è denaro • Le performance partono dal codice • Page Speed è una vanity metric • La velocità è una percezione • Page builder è sinonimo di lentezza 112
  113. 113. #wcmil @andreacardinali November 18th 2017 RICAPITOLANDO • Concentratevi sul 20% che permette di ottenere l’80% dei risultati • PHP 7 / GZIP/ HTTP/2 / Cache • Priorità ai contenuti above the fold • Se non lo vedo, non lo carico (lazy load) 113
  114. 114. #wcmil @andreacardinali November 18th 2017 BONUS TRACK 114
  115. 115. #wcmil @andreacardinali November 18th 2017 PLUGIN - 1 CARICAMENTO ASINCRONO / DIFFERITO • https://it.wordpress.org/plugins/async- javascript/ LAZY LOAD • https://it.wordpress.org/plugins/bj-lazy-load/ • https://wordpress.org/plugins/rocket-lazy-load/ PERFORMANCE • https://wp-rocket.me/it/ • https://it.wordpress.org/plugins/w3-total- cache/ 115
  116. 116. #wcmil @andreacardinali November 18th 2017 PLUGIN - 2 OTTIMIZZAZIONE FRONTEND / CRITICAL RENDER PATH • https://it.wordpress.org/plugins/above-the- fold-optimization/ SERVER PUSH • https://it.wordpress.org/plugins/http2- server-push/ CARICAMENTO CONDIZIONALE JS/CSS • https://wordpress.org/plugins/wp-asset- clean-up/ 116
  117. 117. #wcmil @andreacardinali November 18th 2017 ALTERNATIVE A PAGE BUILDER Utilizzare ItalyStrap • 100% made in Italy • Veloce (scritto tenendo a mente le performance) • SEO Friendly http://bit.ly/ItalyStrapWCMIL17 117
  118. 118. #wcmil @andreacardinali November 18th 2017 WORDPRESS MEETUP ROMAGNA QUANDO: ogni 1°Martedì del mese (prossimo 3 Dicembre) DOVE: Dinamo Coworking Space Cesena PERCHÉ: Per parlare di WordPress, conoscere bella gente e condividere le proprie esperienze wpromagna.com @romagnawp 118
  119. 119. #wcmil @andreacardinali November 18th 2017 DOMANDE? 119
  120. 120. #wcmil @andreacardinali November 18th 2017 THANKS! • Twitter:@andreacardinali • Slideshare: http://www.slideshare.net/andreacardinali • Website: https://www.andreacardinali.it/ 120

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