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Site Performance - From Pinto to Ferrari
- 1. Hello
- 2. This Slide Intentionally Left Blank
- 3. This One Too
- 4. Site Performance from Pinto to Ferrari Joseph Scott joseph@josephscott.org http://josephscott.org/
- 6. The Pinto
- 15. The Ferrari
- 19. 2007
- 20. 2009
- 21. Why Did I Choose This Topic?
- 22. I Want My Site To Be Faster
- 23. I Want My Site To Be Faster Less Like A Pinto
- 24. I Want My Site To Be Faster More Like A Ferrari
- 25. How Fast Is It Now?
- 26. How Fast Is It Now? Tools For Measuring Site Performance
- 27. Tools webpagetest.org pagespeed.googlelabs.com Firefox & Firebug Chrome/Safari & Dev Tools HttpWatch
- 28. Where To Start?
- 31. Browsers IE 8 still most commonly used browser (26.5% / 28.5%) http://gs.statcounter.com/#browser_version-na-monthly-201106-201108-bar
- 32. Connection Speed FIOS 20Mbps
- 34. Which Part?
- 37. The Initial Request Get the source for the page
- 38. The Initial Request Get the source 0.113 seconds for the page
- 39. The Initial Request DNS Lookup: 5 ms Initial Connection: 47 ms Time to First Byte: 57 ms Content Download: 4 ms Bytes In (downloaded): 9.6 KB Bytes Out (uploaded): 0.4 KB
- 40. Requests Per Page November 2010: 69 August 2011: 76 http://www.stevesouders.com/blog/2011/08/17/http-archive-nine-months/
- 43. Thinking Clearly About Performance http://carymillsap.blogspot.com/2010/02/thinking- clearly-about-performance.html
- 44. Average Lies List A List B 0.924 0.796 0.928 0.798 0.954 0.802 0.957 0.823 0.961 0.919 0.965 0.977 0.972 1.076 0.979 1.216 0.987 1.273 1.373 1.320 pg3, Exhibit 1
- 45. Aim For Consistent Performance
- 47. Know Your Limits Calculate the theoretical best performance for your setup
- 48. Know Your Limits Calculate the theoretical best performance for your setup What ever you actually end up with will be slower than that
- 49. Moving Up The Stack
- 51. The Stack Server Hardware Network
- 52. The Stack Operating System Server Hardware Network
- 53. The Stack HTTP Operating System Server Hardware Network
- 54. The Stack HTTP PHP Operating System Server Hardware Network
- 55. The Stack HTTP PHP MySQL Operating System Server Hardware Network
- 56. The Stack WordPress HTTP PHP MySQL Operating System Server Hardware Network
- 57. The Stack WordPress HTTP PHP MySQL Operating System Server Hardware Network
- 58. HTTP - The Web Server Apache remove any modules you aren’t using turn off host name lookups turn off FollowSymLinks turn off .htaccess (if you can) turn on compression (mod_deflate) tweak MaxClients
- 59. HTTP - The Web Server Apache - mod_pagespeed http://code.google.com/speed/page-speed/docs/module.html http://code.google.com/p/modpagespeed/
- 60. HTTP - The Web Server Consider Alternatives Nginx
- 61. HTTP - The Web Server HTTP Compression Keep-alive support Correctly Configured Caching
- 62. ETag Survey HTTP/1.1 200 OK ETag: "cd7ac991ff11"
- 63. ETag Survey If-None-Match: "cd7ac991ff11" HTTP/1.1 304 NOT MODIFIED
- 64. ETag Survey ETags used by 136 of the top 1,000 U.S. sites http://josephscott.org/archives/2011/09/etag-survey/
- 65. ETag Survey Of the 136 sites using ETags: 54 Worked Correctly (39.7%) 11 Sort of Worked (8%) 71 Broken/Useless (52.2%)
- 67. Understanding PHP Lifespan .php Read Parse Compile Execute Output
- 68. Understanding PHP Lifespan .php Read Parse Compile Execute Output Apache / mod_php
- 69. Understanding PHP .php Lifespan Read Parse Compile Execute Output FastCGI Nginx
- 70. Reading Open Read Close
- 71. Reading Open Read Close Avoid co$tly services like NFS
- 72. Parse hello.php <?php echo "Hello, World!n" Parse error: syntax error, unexpected $end, expecting ',' or ';' in /tmp/hello.php on line 3
- 73. Tokens <?php echo $tokens = token_get_all( ' "Hello, World!";' );
- 74. foreach ( $tokens as $token ) { if ( is_array( $token ) ) { echo token_name( $token[0] ) . " ( {$token[2]} ) - {$token[1]}n"; } else { echo "{$token}n"; } }
- 75. T_OPEN_TAG ( 1 ) - <?php T_ECHO ( 1 ) - echo T_WHITESPACE ( 1 ) - T_CONSTANT_ENCAPSED_STRING ( 1 ) - "Hello, World!" ;
- 76. Compile
- 77. Branch analysis from position: 0 Return found filename: /tmp/hello.php function name: (null) number of ops: 3 compiled vars: none line # op fetch ext return operands ------------------------------------------------------------------------------- 2 0 ECHO 'Hello%2C+World%21%0A' 3 1 RETURN 1 2* ZEND_HANDLE_EXCEPTION
- 78. Execute Deceptively Simple Term •Includes all sorts of activity •Database / remote requests
- 79. Output •PHP can buffer output •Don’t forget about compression
- 81. Making PHP Faster .php Read Parse Compile Execute Output
- 82. Making PHP Faster .php Read APC Parse Compile Execute Output
- 83. Making PHP Faster .php Read APC Parse Compile Execute Output opcode cache
- 84. PHP - opcode caching APC requests per second - increased 4x time per request - decreased 4x
- 85. Use An Opcode Cache (APC)
- 86. Use An Opcode Cache (APC)!
- 87. APC == Free Money
- 88. APC == Free Money
- 89. PHP use an opcode cache (APC) use newer versions don’t use on static files (unless you really need to) consider output buffering be careful with preg_* functions profile your running code (Xdebug, VLD) don’t re-invent native PHP functions, they are likely faster than yours
- 90. The Stack WordPress HTTP PHP MySQL Operating System Server Hardware Network
- 91. MySQL use InnoDB table type (unless you have a really good reason not to) use the slow query log use EXPLAIN on queries, learn what the output means double triple check your indexes learn about quirks
- 92. The Stack WordPress HTTP PHP MySQL Operating System Server Hardware Network
- 94. Memcached “Free & open source, high-performance, distributed memory object caching system” in memory only, won’t survive a reboot key/value data store http://memcached.org/
- 95. WordPress + Memcached Memcached Object Cache Persistent data store for WordPress objects Reduces the number of database queries http://wordpress.org/extend/plugins/memcached/
- 96. I’m Batcache
- 97. WordPress + Memcached Batcache Persistent data store for rendered pages http://wordpress.org/extend/plugins/batcache/
- 98. WordPress Caching - Alternatives WP Super Cache http://wordpress.org/extend/plugins/wp-super-cache/ W3 Total Cache http://wordpress.org/extend/plugins/w3-total-cache/
- 99. But Wait, There’s More!
- 100. MySQL Replication Master / Slave one way, asynchronous send writes to the master send reads to the slave supports multiple slaves, and chaining
- 101. WordPress + HyperDB Drop in replacement for default DB class distributed reads and writes partition data http://wordpress.org/extend/plugins/hyperdb/
- 102. What Could This Look Like?
- 103. What Could This Look Like? Net web & database
- 104. What Could This Look Like? Net db web
- 105. What Could This Look Like? db Net web memcached
- 106. What Could This Look Like? db db Net web memcached memcached
- 107. What Could This Look Like? web db db load web balancer web memcached memcached
- 108. Variations slave just for backups multiple data centers task specific web servers
- 109. When Things Go Wrong
- 110. Hire an Amazing SysAdmin
- 111. Questions?
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