Intro to how to achieving best performance of PHP7

1. PHP7
For Its Best Performance
@laruence

2. SELF INTRODUCTION
‣ Author of Yaf, Yar, Yac, Yaconf, Taint Projects
‣ Maintainer of Opcache, Msgpack, PHP-Lua Projects
‣ PHP Core Developer Since 2011
‣ Zend Consultant Since 2013
‣ One of PHP7 Core Developers: Dmitry Stogov, Xinchen Hui, Nikita Popov
‣ Chief Software Architect at Lianjia Since 2015

3. W3Techs.com 100
‣ Released in 1994 by Rasmus Lerdorf
‣ 20+ Years Programming Language
‣ Most Popular Web Service Program Language
‣ PHP7 is Released at 3 Dec 2015
‣ Latest Version is PHP7.0.4
PHP

4. ‣ For Unicodes Supports
‣ Started in 2005, Die in 2010
‣ Most Features Goes Into PHP-5.3
‣ ++PHP5 = PHP7
PHP6

5. ‣ Based on PHP-5.5 JIT-Opcache Project
‣ One year long work for better PHP performance
PHP7

6. ‣ Memory Optimization - PHP spends 20% time on Memory
‣ Reduce Memory allocations
‣ Reduce Memory Usage
‣ Reduce Memory Indirection
‣ Cache friendly
PHPNG
zval gc_infoblock_info
0 16 40 56
Zval in PHP5
zval
0 16
Zval in PHP7

7. ‣ Improved Performance: PHP 7 is up to twice as fast as PHP 5.6
‣ Significantly Reduced Memory Usage
‣ Abstract Syntax Tree
‣ Consistent 64-bit Support
‣ Improved Exception Hierarchy
‣ Many Fatal Errors Converted to Exceptions
‣ The Null Coalescing Operator (??)
‣ Return & Scalar Type Declarations
‣ Anonymous Classes
‣ And More..
PHP7

8. BENCHMARK

9. REAL-LIFE APPLICATION BENCH

10. PHP5.6 VS PHP7

11. PERFORMANCE COMPARISON BY ULABOX

12. PERFORMANCE COMPARISON BY ATRAPALO

13. PERFORMANCE COMPARISON BY WEIBO
15%
20%
25%
30%
35%
40%
45%
12/13/15
12/14/15
12/15/15
12/16/15
12/17/15
12/18/15
12/19/15
12/20/15
12/21/15
12/22/15
12/23/15
12/24/15
12/25/15
12/26/15
12/27/15
12/28/15
12/29/15
12/30/15
12/31/15
01/01/16
01/02/16
01/03/16
01/04/16
01/05/16
01/06/16
01/07/16
01/08/16
01/09/16
01/10/16
01/11/16
01/12/16
01/13/16
01/14/16
01/15/16
01/16/16
01/17/16
01/18/16
01/19/16
01/20/16
01/21/16
01/22/16
01/23/16
01/24/16
01/25/16
01/26/16
01/27/16
01/28/16
01/29/16
01/30/16
01/31/16
02/01/16
02/02/16
02/03/16
02/04/16
02/05/16
CPU : User Time
0
1
2
3
4
5
6
7
8
DateTime
12/14/15 13
12/15/15 9
12/16/15 5
12/17/15 1
12/17/15 21
12/18/15 17
12/19/15 13
12/20/15 9
12/21/15 5
12/22/15 1
12/22/15 21
12/23/15 17
12/24/15 13
12/25/15 9
12/26/15 5
12/27/15 1
12/27/15 21
12/28/15 17
12/29/15 13
12/30/15 9
12/31/15 5
1/1/16 1
1/1/16 21
1/2/16 17
1/3/16 13
1/4/16 9
1/5/16 5
1/6/16 1
1/6/16 21
1/7/16 17
1/8/16 13
1/9/16 9
1/10/16 5
1/11/16 1
1/11/16 21
1/12/16 17
1/13/16 13
1/14/16 9
1/15/16 5
1/16/16 1
1/16/16 21
1/17/16 17
1/18/16 13
1/19/16 9
1/20/16 5
1/21/16 1
1/21/16 21
1/22/16 17
1/23/16 13
1/24/16 9
1/25/16 5
1/26/16 1
1/26/16 21
1/27/16 17
1/28/16 13
1/29/16 9
1/30/16 5
1/31/16 1
1/31/16 21
2/1/16 17
2/2/16 13
2/3/16 9
2/4/16 5
2/5/16 1
Used Memory

14. ‣ PHP 7 is Up to Twice as Fast as PHP 5.6
‣ Significantly Reduced Memory Usage
‣ However, It Could Be Faster…
MAKE PHP7 FASTER

15. ‣ Unix Domain Socket
‣ FastCGI Params
‣ Use Static PM
‣ Less Configuration is Better
‣ Opt Children Number = Total CPU Resource / CPU Usage Per Request
‣ Of course, 400 children also make sense
NGNIX+PHP-FPM

16. ‣ Deploying Document Root in Tmpfs
‣ Use Fixed Size Memory
‣ Data Could Be Lost After Reboot
USE TMPFS

17. USE LATEST COMPILER
‣ More Compiler Optimization
‣ GCC4.8 - Global Registers
‣ %r14 : execute_data
‣ %r15: opline
‣ Up to 10% Performance Improvement

18. Using PGO is simple in PHP7
USE PGO
‣ Profile Guided Optimization
‣ Optimize for Specific Cases
‣ Optimization According to Data Collected
in Runtime
‣ Up to 7% Performance Improvement
‣ Each Coin Has Two Side

19. ‣ Persistent Secondary File-Based Cache for OPCache
‣ Shared Memory is Limited
‣ Cache Can Live Across Processes
‣ opcache.file_cache=/tmp/
‣ opcache.file_cache_only?
OPCACHE FILE CACHE

20. ‣ Hugepages - Reduce TLB Miss
‣ Opcache.huge_code_page - Reduce iTLB miss
‣ Shared Memory
‣ Regular Memory Allocations
‣ Note: SIGBUS on Forking
‣ USE_ZEND_ALLOC_HUGE_PAGES = 1
‣ PHP7.0.5
USE HUGEPAGES

21. Always Do Your Own Benchmark

22. ‣ http://w3techs.com/technologies/overview/programming_language/all
‣ http://talks.php.net/confoo16#/perf2014
‣ https://carlosbuenosvinos.com/first-tests-with-php7-in-production-at-atrapaloeng/
‣ https://techblog.badoo.com/.../how-badoo-saved-one-million-dollars-switching-to-php7/
Links

23. Q&A