Hhvm and wordpress
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The document discusses how HHVM (HipHop Virtual Machine), a just-in-time compiler created by Facebook, can improve the performance of PHP-based websites like WordPress by compiling PHP to bytecode faster than traditional PHP processing. It provides benchmarks showing HHVM's performance advantages over PHP-FPM and describes tools like XHProf that can help optimize WordPress sites to take advantage of HHVM's capabilities. While HHVM has risks with poorly coded themes/plugins, its performance gains make it worth considering as an alternative PHP processor.
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Hhvm and wordpress
- 1. How will it effect the future of WordPress?
- 2. What are we talking about? • The middle layer of page processing (PHP) • How this effects you and your WP development • WP, PHP, plugins, themes, BuddyPress • What tools to I need to use HHVM?
- 3. Why change PHP? • PHP processing is slow • Run time compilation means slow • Existing op-code caches do an okay job (APC, eAccelerator) • PHP is loosely type and a ‘scripting language’ • Resulting in poorly coded habits, themes and plugins • Resulting in less that optimal performance • Syntax errors fatal crash at runtime
- 4. What’s the big deal? • PHP mainstream has not spent a lot of time optimizing it’s core, therefore leaving it to become slow • PHP-FPM has been the FastCGI PHP processor of choice • Along comes HPHPc (HipHop for PHP) interpreter and compiler created by Facebook (~2009 - 2013) • Now comes HHVM (HipHop Virtual Machine ~2012)
- 5. How is HHVM better? • JIT - just in time compilation of code to bytecode • Convert PHP to intermediate byte code then machine code • Even faster by enabling RepoAuthoritative mode • Tools to detect syntax errors ahead of time? • More strict typed PHP
- 6. How do I invoke it? • Command line: hhvm foo.php • Webserver, port 80/443 • FastCGI, behind apache/nginx • Debian packaging: apt-get install hhvm
- 7. Where does HHVM fit? Nginx Apache/FPM/ FastCGI Mysql Memcached PHP/WP browser HHVM Mysql Nginx PHP/WP Memcached browser
- 8. Why is this important? • HHVM is faster • Less time processing PHP means faster websites • Sites that are not very cacheable become more performant
- 9. By the numbers 0 0.15 0.3 0.45 0.6 WP 1 WP 2 WP 3 WP 4 HHVM FPM Avgpageloadtime WP installs
- 10. More numbers 0 0.4 0.8 1.2 1.6 1 2 5 8 10 15 20 HHVM FPM Apache Number concurrent requests Avgloadtime(secs) One WP, different PHP processor tests
- 11. Even more numbers 0 0.5 1 1.5 2 1 2 5 8 10 15 20 HHVM 14.04 FPM 14.04 Apache 14.04 Apache 12.04 Apache 10.04 One WP, different PHP processor tests Avgloadtime(secs) Number concurrent requests
- 12. Things that go bump http://xkcdsw.com/content/img/1218.png
- 13. Is there risk? • HHVM + poorly written WordPress themes/plugins can be unstable and unpredictable • Why? HHVM compiler is strict and doesn’t support all of PHP historical coding practices • Memory leaks in HHVM • Faster PHP is good, but if it doesn’t work, that’s bad
- 14. Squeeze the performance • Xhprof - profiling tool • Convert PHP to Hack - hh_client (typechecker) and hackificator • HHVM RepoAuthoritative mode - compile .php files in a directory to one sqlite3 file
- 15. Xhprof & XhGui
- 18. What is WPE doing? • Labs team investigation and beta with select sites • Add HHVM to our web stack • High availability and failover. If/when HHVM fails, another service does the PHP processing • Development tools to develop your WP for HHVM
- 19. Resources • hhvm.com • github.com/facebook/hhvm • docs.hhvm.com/manual/en/intro.xhprof.php • github.com/preinheimer/xhprof github.com/phacility/xhprof • www.sitepoint.com/the-need-for-speed-profiling- with-xhprof-and-xhgui/
- 20. Son: Dad, cicadas can jump to China. Dad: Wow, that’s far, how do that do that? Son: With their legs. Dad: Oh Son: And if the moon was China, they could jump to the moon too. Dad: Well, of course. You think it’ll make it? Son: If it really wants to, it will. Inspiration from a 4 yr old