1.
PERFORMANCE TIPS
FOR SYMFONY2 & PHP
Minsk PHP User Group Meetup #10

2.
Intro
 Max Romanovsky
 37 Slides
 Questions after presentation
 Out of scope: HW & OS tuning, VM vs HW
servers
 “Premature optimization is the root of all evil”
Knuth’s quote is missing
 No cats, boobs or other images in slides 
2

3.
Quiz
3
 What to optimize?
 Architecture
 Code
 Services

4.
Agenda
 Overview
 Measure
 Services
 Architecture
 Code
 Symfony2 tips
4

5.
5 Overview

6.
How to start?
 Forget about microoptimizations for now
 Курочка по зернышку – весь двор в говне
 Make it scalable
 What is cheaper? To scale or to optimize?
6

7.
Tune
 Tune services
 Tune architecture
 Consider tuning code
7

8.
Quiz
8
 What was the sloooooowest?
 DB queries
 Network communication
 PHP configuration
 VM/HW server
 Stupid code

9.
What could be slow
9
 Network communication (with client, inside
LAN)
 VM/HW server
 OS & runtime itself
 Communication with services
 Code (finally!)

10.
10 Measure

11.
Stop! Measure
11
 Measure before
 Measure during
 Measure after
 Measure periodically
 measure
 Measure
 MEASURE!!1

12.
Quiz
12
 What do you use?
 Symfony Profiler
 symfony/stopwatch
 Из говна и палок
 Xhprof
 Xdebug
 Zend Profiler

13.
Tools
13
 Xhprof / uprofiler
 Xdebug 
 Framework tools 
  = overhead & irrelevant results

14.
Question
14
 Can we compare xhprof & xdebug results?
 Are they relevant?

15.
Overhead & irrelevant results?
15
 Runtime (i.e. code execution) is slower with
profiler enabled
 Communication with services is not slower
 Mess in results
 You are analyzing DIFFERENT results

16.
Use lightweight profiler
16
 XHProf
 XHgui (saves runs to RDBMS)
 Uprofiler (fork?)
 https://github.com/FriendsOfPHP/uprofiler

17.
Measure performance in real
world
17
 Turn on profiler periodically
 For 1% of requests
 For 1 app server
 Record & replay user activity
 Use Jmeter to record scenarios
 Use good old ab, siege, http_load

18.
Tune
18
 Tune 1 factor at once
 Store configuration & measuring results in
VCS
 Measure after tuning

19.
19 Services

20.
Why?
20
 Receive profit without changing a single line of
code

21.
Question
21
 Do you know what is an Opcache?
 Do you use it?

22.
PHP
22
 Don’t use the latest PHP version, please!
 Use PHP-FPM (or even HHVM?)
 Opcache or APC
 APCu
 Compile stable libraries as PHP extensions
 Twig
 Redis
 AMQP

23.
Composer
23
 composer install --optimize-autoloader

24.
24 Architecture

25.
Architecture
 Make it scalable. Period.
 Use PAAS services
 CDN
 File storage
 Choose efficient protocols & frameworks
 Apache Thrift
 Google Protocol Buffers
25

26.
Cache
26
 Raw data
 Computed data
 View layer

27.
Cache
27
 Raw data = DB/Data Source
 MySQL query cache
 HTTP API reverse proxy cache

28.
Cache
28
 Computed data = Key-value
 Persistent?
 Consistent?
 Check your DB features

29.
Cache
29
 View layer = HTTP cache
 Nginx
 Varnish

30.
30 Code

31.
Why not to optimize
31
 Improve architecture
 Man, it’s PHP! It is designed to be SLOOOOW
 Optimize code for people, not for machines
 Курочка по зернышку?..
 Well… OK. But profile

32.
What to optimize. Boooring
32
 DB
 Move calculations to DB
 Move aggregation to DB
 MOVE LIMIT TO DB!!1
 Move calculations outside the loop
 Don’t concatenate string insanely
 Don’t pass huge arrays by value to functions
 Don’t use arrays anyway 

33.
33 Symfony2 tips

34.
As seen on TV
34
 http://symfony.com/doc/current/book/performa
nce.html
 Use a Byte Code Cache
 Composer's Class Map
 Caching the Autoloader with APC
 Use Bootstrap Files

35.
Tipzzz
35
 Services
 Lazy with ocramius/proxy-manager
 Controllers
 Console commands
 Move app/cache to tmpfs
 Twig C extension
 Don’t use router:dump. It’s deprecated
 https://github.com/symfony/symfony/issues/9652
 Don’t use Symfony Profiler for profiling 

36.
More?
36
 http://symfony.com/blog/push-it-to-the-limits-symfony2-
for-high-performance-needs
 https://www.youtube.com/watch?v=b8ewqVGu
77w
 https://profiler.sensiolabs.com/ - still waiting for
invite

37.
The End
37
 max.romanovsky@gmail.com
 http://maxromanovsky.com