Page speed is increasingly important for websites. Performance is User Experience and not only a Development Issue. Performance is a process and starts in conception and design.

1. @webinterface
DESIGN THE PRIORITY
PERFORMANCE
AND UX
U-Conference Usability Insights 2016
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2. PETER ROZEK
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3. @webinterface
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4. WORK @ ecx.io (DIGITAL AGENCY)
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6. UX, USABILITY, ACCESSIBILITY,
FRONTEND
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7. @webinterface
WHY BUILD AN FAST
EXPERIENCE ?

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RESPONSIVE AND FAST IS
USER EXPERIENCE.

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FAST PAGE LOAD TIME
BUILDS TRUST IN YOUR
SITE.

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BETTER CONVERSION
RATE.

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WE HAVE SLOW
CONNECTION SPEEDS !

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DO YOU KNOW YOUR
WHY ?
DOES YOUR CLIENT
KNOW ITS WHY ?

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FACTS FROM THE USER !
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14. @webinterface
Website was too slow to load.
73%

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Website that crashed, froze, or received an error.
51%

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Website wasn’t available.
38%

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Consumers expect a web page to load in 2
seconds or less.
47%

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People abandon a website that takes more than
3 seconds to load.
40%

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1 SECOND DELAY
in page response can result in a
7% REDUCTION IN
CONVERSION.
Source: Mobilism: High Performance Mobile

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An e-commerce site is making
$100,000 PER DAY
1 SECOND DELAY
could potentially cost you
$2.5 million
in lost sales every year.
Source: Data Monday: E-commerce Performance

21. @webinterface Source: why_web_performance_matters.pdf

22. @webinterface
SPEED IS A KILLER !
Source: http://www.shmee.me

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WHAT IS AN FAST
EXPERIENCE ?

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OBJECTIVE TIME OR
CLOCK TIME
Source: http://www.fon.hum.uva.nl

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PSYCHOLOGICAL TIME OR
BRAIN TIME

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TIME TO INTERACT
AND
LOAD TIME
USER´ S PERCEPTION
OF TIME
vs.

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JACOB NIELSEN:
WEBSITE RESPONSE TIMES
Source: https://www.nngroup.com/articles/website-response-times/
0,1 - 0,2s 0,5 - 1s 2 - 5s 5 - 10s
Instant Immediate User Flow Keeping the
user´ s attention

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LOADTIME FINGER DOWN ANIMATION FINGER UP
Source: https://docs.google.com/presentation/
max 100ms max 6ms
chunks
do idle/
cleanup in
50ms chunks
in case finger
down
happens again

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PERFORMANCE IS ABOUT
PERCEPTION.

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31. @webinterface
ABOVE THE FOLD
CRITERION

32. Source: Radware_SOTU_Report_Spring_2015.pdf@webinterface

33. @webinterface
HOW TO BUILD AN
FLEXIBLE, LIGHTNING-
FAST EXPERIENCE ?

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CLARITY FOCUS

35. @webinterface
BUILDSALES CONCEPT/DESIGN ROLL-OUTSTRATEGY
PERFORMANCE
PROJECT TIMELINE

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PERFORMANCE IS A
ESSENTIAL DESIGN
FEATURE.

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PERFORMANCE
BUILDSALES CONCEPT/DESIGN ROLL-OUTSTRATEGY

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Client understands the benefits.
BUILDSALES CONCEPT/DESIGN ROLL-OUTSTRATEGY

39. @webinterface
Advocate performance as a priority.
BUILDSALES CONCEPT/DESIGN ROLL-OUTSTRATEGY

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Concept and Design is committed within a
performance budget.
BUILDSALES CONCEPT/DESIGN ROLL-OUTSTRATEGY

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Development is prepared to successfully integrate
performance as a priority.
BUILDSALES CONCEPT/DESIGN ROLL-OUTSTRATEGY

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SETTING A
PERFORMANCE BUDGET
Source: https://timkadlec.com/2013/01/setting-a-performance-budget/

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1007 KB
86 Resources
1354 KB
108 Resources
2013
grown by
26%
Source: Radware_SOTU_Report_Spring_2015.pdf
2015

44. @webinterface Source: https://developers.google.com/speed/docs/insights....

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46. @webinterface
EGDE
150 KB
220 KB
SOMEWHERE BETWEEN
AND
2
SECONDS
ON EDGE

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3G
SECONDS
ON 3G
2 350 KB
400 KB
SOMEWHERE BETWEEN
AND

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PERFORMANCE BUDGET
400
KB
100 kb fonts
50 kb css
200 kb images
50 kb javascript

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SOLUTION FOR IMAGES:
<PICTURE> ELEMENT

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51. @webinterface
RESPONSIVE WILL
CONTENT THAT FITS, NOT
DESKTOP HAND-ME-
DOWNS.

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MOBILE FIRST AND
CONTENT FIRST:
BUILD AN EXPERIENCE
MAP.

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CARRING OUT THE
RESEARCH.

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GROUPING THE CORE
AND ADDITIONAL
EXPERIENCE.

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ADDITIONAL CONTENT:
PROGRESSIVELY LOAD
THE EXTRAS.

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CONDITIONAL
LOADING
Source: Conditional Loading for RWD , Client-Side Solution

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PRIORITIZING THE CORE
EXPERIENCE.

58. Image Source: Build an experience map@webinterface

59. @webinterface
ORDERING OBJECTIVES

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61. @webinterface
MAPPING THE BUSINESS

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63. @webinterface
MAPPING THE
COMPETITION

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65. @webinterface
IDENTIFYING
OPPORTUNITIES

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67. @webinterface
CREATING A READMAP OF
WORK.

68. @webinterface
LAST WORDS

69. @webinterface
COMMUNICATION
SET A GOAL
COMMUNICATE
REPEAT

70. @webinterface
PROCESS
MESUARE
OPTIMISE
REPEAT

71. @webinterface
PERFORMANCE IS ABOUT
PERCEPTION
MANAGEMENT.

72. @webinterface
TIME TO INTERACT
VS.
LOAD TIME

73. @webinterface
DELIVER CORE
EXPERIENCE FIRST,
THEN PROGRESSIVELY
ENHANCE THE EXTRAS.

74. Brad Frost
https://www.youtube.com/watch?v=nE0CRMm59BY@webinterface
„Great minds discus principles.
Average minds discus technologies.
Small minds discus tools.“

75. THANKS
…dear Ellen
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76. @webinterface
peter.rozek@ecx.io