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PROFILING & OPTIMIZATION Tools, guidelines, and techniques Saturday, 9 November, 13
PERFORMANCE Saturday, 9 November, 13
GETTING BUY-IN Saturday, 9 November, 13
HIGHER CONVERSION RATES Saturday, 9 November, 13
SLOW MOBILE CONNECTIONS Saturday, 9 November, 13
RULES; MORE LIKE GUIDELINES Saturday, 9 November, 13
Guideline MEASURE EVERYTHING Saturday, 9 November, 13
Guideline HUNT THE BIG FISH Saturday, 9 November, 13
Guideline START CHEAP & ITERATE Saturday, 9 November, 13
Cost Order Minify assets Compress images Reduce number of HTTP requests Optimize database queries Add caching Code optimiz...
JUNK UP FRONT Saturday, 9 November, 13
Junk Up Front Saturday, 9 November, 13
Measuring Chrome developer tools Saturday, 9 November, 13
Junk up front Number of requests Number of hosts Image count & image size Script count & script size Saturday, 9 November...
Fixing Smushit (pngcrush, jpegtran, imagemagick) Uglify.js, CSSMin Make, phing, rake, grunt, shell scripts Saturday, 9 N...
Image sprites Easy way to reduce requests, and overall page size. Data-URIs. Icon WebFonts. Saturday, 9 November, 13
Guideline AVOID WORK TO GO FASTER Saturday, 9 November, 13
WEBSERVER TRICKS Saturday, 9 November, 13
Measuring Chrome developer tools Saturday, 9 November, 13
Webserver tricks GZIP all the things. Far Future cache headers. Consider a CDN. Saturday, 9 November, 13
SQL MOLASSES Saturday, 9 November, 13
Database slowness Many backend performance issues are caused by too many, or slow queries. Mysql has a pretty terrible que...
Database slowness Slow query logs - Percona makes great tools for MySQL. Disable query caching. Run EXPLAIN on slow querie...
Explain Queries Visual explain makes it easier. Saturday, 9 November, 13
Indexes Index commonly used columns. Column order in matters in indexes. Saturday, 9 November, 13
CACHING Saturday, 9 November, 13
Caching Can be expensive to rollout, if you need new infrastructure Cache expiration is really really hard. Saturday, 9 ...
What to Cache Results that don’t change often Use monitoring/analytics to find the busiest pages. Start using caching ther...
Where to cache Hopefully in RAM Failing that in shared memory Disk :( Saturday, 9 November, 13
Optimize cache use Watch cache miss rate. Tune cache expiration so you miss less often. Saturday, 9 November, 13
Guideline OPTIMIZE CODE LAST, MOST OF THE TIME Saturday, 9 November, 13
JAVASCRIPT Saturday, 9 November, 13
PHP Saturday, 9 November, 13
Javascript tools Chrome dev tools are the gold standard. CPU profiles are invaluable. Heap comparisons can be used to fin...
CPU Profiler Chrome dev tools Saturday, 9 November, 13
CPU Profiler Chrome dev tools Saturday, 9 November, 13
CPU Profiler Chrome dev tools Saturday, 9 November, 13
CPU Profiler Chrome dev tools Saturday, 9 November, 13
PHP TOOLS Saturday, 9 November, 13
XHProf PECL extension produced by Facebook. Captures runtime metrics at a function level. Possible to use in a sub-sample...
Xhgui Nicer UI to XHProf data Saturday, 9 November, 13
Xhgui Nicer UI to XHProf data Saturday, 9 November, 13
XDebug Not suitable for servers with traffic, Very detailed results. Saturday, 9 November, 13
Webgrind XDebug UI Saturday, 9 November, 13
Other PHP tweaks Opcode caching is a must. Don’t use file based sessions. Saturday, 9 November, 13
RECAP Saturday, 9 November, 13
MEASURE EVERYTHING Saturday, 9 November, 13
BE THRIFTY Saturday, 9 November, 13
START IN THE FRONT Saturday, 9 November, 13
AVOID WORK Saturday, 9 November, 13
OPTIMIZE CODE Saturday, 9 November, 13
THANKS Saturday, 9 November, 13
Thanks mark_story on Twitter. markstory on Github. Rate this talk: https://joind.in/9994 Saturday, 9 November, 13
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Performance and optimization

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Performance and optimization

  1. 1. PROFILING & OPTIMIZATION Tools, guidelines, and techniques Saturday, 9 November, 13
  2. 2. PERFORMANCE Saturday, 9 November, 13
  3. 3. GETTING BUY-IN Saturday, 9 November, 13
  4. 4. HIGHER CONVERSION RATES Saturday, 9 November, 13
  5. 5. SLOW MOBILE CONNECTIONS Saturday, 9 November, 13
  6. 6. RULES; MORE LIKE GUIDELINES Saturday, 9 November, 13
  7. 7. Guideline MEASURE EVERYTHING Saturday, 9 November, 13
  8. 8. Guideline HUNT THE BIG FISH Saturday, 9 November, 13
  9. 9. Guideline START CHEAP & ITERATE Saturday, 9 November, 13
  10. 10. Cost Order Minify assets Compress images Reduce number of HTTP requests Optimize database queries Add caching Code optimization Saturday, 9 November, 13
  11. 11. JUNK UP FRONT Saturday, 9 November, 13
  12. 12. Junk Up Front Saturday, 9 November, 13
  13. 13. Measuring Chrome developer tools Saturday, 9 November, 13
  14. 14. Junk up front Number of requests Number of hosts Image count & image size Script count & script size Saturday, 9 November, 13
  15. 15. Fixing Smushit (pngcrush, jpegtran, imagemagick) Uglify.js, CSSMin Make, phing, rake, grunt, shell scripts Saturday, 9 November, 13
  16. 16. Image sprites Easy way to reduce requests, and overall page size. Data-URIs. Icon WebFonts. Saturday, 9 November, 13
  17. 17. Guideline AVOID WORK TO GO FASTER Saturday, 9 November, 13
  18. 18. WEBSERVER TRICKS Saturday, 9 November, 13
  19. 19. Measuring Chrome developer tools Saturday, 9 November, 13
  20. 20. Webserver tricks GZIP all the things. Far Future cache headers. Consider a CDN. Saturday, 9 November, 13
  21. 21. SQL MOLASSES Saturday, 9 November, 13
  22. 22. Database slowness Many backend performance issues are caused by too many, or slow queries. Mysql has a pretty terrible query planner. Sub-queries and derived table joins will eventually catch fire. Slow query logs, mtop, or monitoring like new relic are your best friend. Saturday, 9 November, 13
  23. 23. Database slowness Slow query logs - Percona makes great tools for MySQL. Disable query caching. Run EXPLAIN on slow queries. Add indexes/tweak queries, and repeat. Saturday, 9 November, 13
  24. 24. Explain Queries Visual explain makes it easier. Saturday, 9 November, 13
  25. 25. Indexes Index commonly used columns. Column order in matters in indexes. Saturday, 9 November, 13
  26. 26. CACHING Saturday, 9 November, 13
  27. 27. Caching Can be expensive to rollout, if you need new infrastructure Cache expiration is really really hard. Saturday, 9 November, 13
  28. 28. What to Cache Results that don’t change often Use monitoring/analytics to find the busiest pages. Start using caching there. Expand once you’ve learned more. Saturday, 9 November, 13
  29. 29. Where to cache Hopefully in RAM Failing that in shared memory Disk :( Saturday, 9 November, 13
  30. 30. Optimize cache use Watch cache miss rate. Tune cache expiration so you miss less often. Saturday, 9 November, 13
  31. 31. Guideline OPTIMIZE CODE LAST, MOST OF THE TIME Saturday, 9 November, 13
  32. 32. JAVASCRIPT Saturday, 9 November, 13
  33. 33. PHP Saturday, 9 November, 13
  34. 34. Javascript tools Chrome dev tools are the gold standard. CPU profiles are invaluable. Heap comparisons can be used to find memory leaks. Saturday, 9 November, 13
  35. 35. CPU Profiler Chrome dev tools Saturday, 9 November, 13
  36. 36. CPU Profiler Chrome dev tools Saturday, 9 November, 13
  37. 37. CPU Profiler Chrome dev tools Saturday, 9 November, 13
  38. 38. CPU Profiler Chrome dev tools Saturday, 9 November, 13
  39. 39. PHP TOOLS Saturday, 9 November, 13
  40. 40. XHProf PECL extension produced by Facebook. Captures runtime metrics at a function level. Possible to use in a sub-sample of production unlike xdebug. Saturday, 9 November, 13
  41. 41. Xhgui Nicer UI to XHProf data Saturday, 9 November, 13
  42. 42. Xhgui Nicer UI to XHProf data Saturday, 9 November, 13
  43. 43. XDebug Not suitable for servers with traffic, Very detailed results. Saturday, 9 November, 13
  44. 44. Webgrind XDebug UI Saturday, 9 November, 13
  45. 45. Other PHP tweaks Opcode caching is a must. Don’t use file based sessions. Saturday, 9 November, 13
  46. 46. RECAP Saturday, 9 November, 13
  47. 47. MEASURE EVERYTHING Saturday, 9 November, 13
  48. 48. BE THRIFTY Saturday, 9 November, 13
  49. 49. START IN THE FRONT Saturday, 9 November, 13
  50. 50. AVOID WORK Saturday, 9 November, 13
  51. 51. OPTIMIZE CODE Saturday, 9 November, 13
  52. 52. THANKS Saturday, 9 November, 13
  53. 53. Thanks mark_story on Twitter. markstory on Github. Rate this talk: https://joind.in/9994 Saturday, 9 November, 13

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