HHVM? Huh? 

Where did it start? 

» Facebook had the "problem" of being too busy 

» Facebook had the "problem" of being too busy » Hip Hop Compiler (hphpc) 

» Facebook had the "problem" of being too busy » Hip Hop Compiler (hphpc) » Compiles PHP to C++ 

» Facebook had the "problem" of being too busy » Hip Hop Compiler (hphpc) » Compiles PHP to C++ » Hip Hop Virtual Machine (HHVM) 

» Facebook had the "problem" of being too busy » Hip Hop Compiler (hphpc) » Compiles PHP to C++ » Hip Hop Virtual Machine (HHVM) » JIT (Just In Time) Compiler 

So what is it? 

» Complete custom implementation of PHP 

» Complete custom implementation of PHP » Can act as server or run on Apache with FCGI 

» Complete custom implementation of PHP » Can act as server or run on Apache with FCGI » Can also run from command line 

» Complete custom implementation of PHP » Can act as server or run on Apache with FCGI » Can also run from command line alias composer='hhvm /usr/local/bin/composer' 

How does it work? 

» Compiles PHP to HHVM bytecode 

» Compiles PHP to HHVM bytecode » Easier to translate to native code 

» Compiles PHP to HHVM bytecode » Easier to translate to native code » Can be interpreted by CPU 

» Compiles PHP to HHVM bytecode » Easier to translate to native code » Can be interpreted by CPU » Cache implemented as SQLite DB on disk 

Comparison time! 

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Compatibility 

» 100% compatibility with 18 of the most popular frameworks/libraries 

» 100% compatibility with 18 of the most popular frameworks/libraries » Average compatibility of 97.49% 

» 100% compatibility with 18 of the most popular frameworks/libraries » Average compatibility of 97.49% » List checked: assetic,codeigniter,composer,doctrine2, drupal,facebookphpsdk,guzzle,idiorm,joo mla,joomlacms,klein,kohana,laravel,mage nto2,mediawiki,mockery,monolog,mustache ,paris,pear,phpbb3,phpmyadmin,phpunit,p roxymanager,ratcher,reactphp,silverstri pe,slim,symfony,twig,vfsstream,yii,zf2 

How to use HHVM 

Command Line hhvm /path/to/script.php 

Daemon hhvm --config /path/to/config.hdf --user www-data --mode daemon 

Daemon Config VirtualHost { * { Pattern = .* RewriteRules { dirindex { pattern = ^/(.*)/$ to = $1/index.php qsa = true } } } } 

FCGI: Apache cd /path/to/your/apache/conf ln -s ../mods-available/mod_proxy.load mods-enabled/mod_proxy.load ln -s ../mods-available/mod_proxy.conf mods-enabled/mod_proxy.conf ln -s ../mods-available/mod_proxy_fcgi.load mods-enabled/mod_proxy_fcgi.load httpd.conf ProxyPass / fcgi://127.0.0.1:9000/path/to/your/www/root/goes/here/ VirtualHost ProxyPassMatch ^/(.*.php(/.*)?)$ fcgi://127.0.0.1:9000/path/to/your/www/root/goes/here/$1 

FCGI: Nginx root /path/to/your/www/root/goes/here; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /path/to/your/www/root/goes/here$fastcgi_script_name; include fastcgi_params; 

The magic of Hack 

Hack: Example

» Easy to move over to hack as it is basically PHP with type annotations 

» Easy to move over to hack as it is basically PHP with type annotations » Contains new collections (Vector, Set, Map, etc) 

» Easy to move over to hack as it is basically PHP with type annotations » Contains new collections (Vector, Set, Map, etc) » Contains new Special-Cased functions 

» Easy to move over to hack as it is basically PHP with type annotations » Contains new collections (Vector, Set, Map, etc) » Contains new Special-Cased functions » invariant, invariant_violation, invariant_callback_register, fun, class_meth, inst_meth, meth_caller 

Hack: invariant

Hack: fun

The End