Profiling PHP With XHProf

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Profiling PHP with XHProf SunshinePHP 2014 Jonathan Klein @jonathanklein Friday, February 7, 14

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Slides, Links: jkle.in/xhprof Friday, February 7, 14

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Who Am I? • Performance Engineer at Etsy • Boston Web Perf Meetup Organizer Friday, February 7, 14

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Etsy Stats Friday, February 7, 14

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Agenda Friday, February 7, 14

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Agenda • Why do you care? Friday, February 7, 14

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Agenda • Why do you care? • Installing XHProf/XHGui Friday, February 7, 14

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Agenda • Why do you care? • Installing XHProf/XHGui • Analyzing the data Friday, February 7, 14

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Agenda • Why do you care? • Installing XHProf/XHGui • Analyzing the data • Takeaways Friday, February 7, 14

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Part 1: Why do you care? Friday, February 7, 14

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Real World Examples http://www.phpied.com/the-performance-business-pitch/ Friday, February 7, 14

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Real World Examples • Shopzilla: -5 seconds = 7-12% increase in revenue http://www.phpied.com/the-performance-business-pitch/ Friday, February 7, 14

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Real World Examples • Shopzilla: -5 seconds = 7-12% increase in revenue • Firefox: -2.2 seconds = 15.4% more downloads http://www.phpied.com/the-performance-business-pitch/ Friday, February 7, 14

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Real World Examples • Shopzilla: -5 seconds = 7-12% increase in revenue • Firefox: -2.2 seconds = 15.4% more downloads • Google: +400ms = 0.76% fewer searches http://www.phpied.com/the-performance-business-pitch/ Friday, February 7, 14

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Real World Examples • Shopzilla: -5 seconds = 7-12% increase in revenue • Firefox: -2.2 seconds = 15.4% more downloads • Google: +400ms = 0.76% fewer searches • Amazon: +100ms = -1% revenue http://www.phpied.com/the-performance-business-pitch/ Friday, February 7, 14

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~80% of page load time takes place on the client Friday, February 7, 14

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...if your backend is fast Friday, February 7, 14

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A fast page load is 1 second This means you have 200ms to get that HTML to the client Friday, February 7, 14

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But network time could be ~100ms This means you have 200ms 100ms to build the page Friday, February 7, 14

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< 100ms feels instant < 1 sec feels responsive < 10 sec to keep user’s attention http://www.nngroup.com/articles/response-times-3-important-limits/ Friday, February 7, 14

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< 100ms feels instant < 1 sec feels responsive < 10 sec to keep user’s attention Full Page Load – 1 Second http://www.nngroup.com/articles/response-times-3-important-limits/ Friday, February 7, 14

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< 100ms feels instant < 1 sec feels responsive < 10 sec to keep user’s attention Full Page Load – 1 Second Base HTML – 200ms http://www.nngroup.com/articles/response-times-3-important-limits/ Friday, February 7, 14

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< 100ms feels instant < 1 sec feels responsive < 10 sec to keep user’s attention Full Page Load – 1 Second Base HTML – 200ms Server Generation Time – 100ms http://www.nngroup.com/articles/response-times-3-important-limits/ Friday, February 7, 14

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#perfmatters Friday, February 7, 14

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Part 2: Installing XHProf/XHGui Friday, February 7, 14

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Steps Friday, February 7, 14

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Steps • Install MongoDB Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui • Generate some data Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui • Generate some data Friday, February 7, 14

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service mongod start Friday, February 7, 14

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pecl install mongo Friday, February 7, 14

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echo "extension=mongo.so" \ > /etc/php.d/mongo.ini Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui • Generate some data Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui • Generate some data Friday, February 7, 14

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pecl install xhprof-beta Friday, February 7, 14

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echo "extension=xhprof.so" \ > /etc/php.d/xhprof.ini Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui • Generate some data Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui • Generate some data Friday, February 7, 14

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cd path/to/xhgui php install.php Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui • Generate some data Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui • Generate some data Friday, February 7, 14

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1% Sample Rate Friday, February 7, 14

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ab -n 500 -c 10 www.foo.com Friday, February 7, 14

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Steps • Install MongoDB • Install XHProf • Install XHGui • Generate some data Friday, February 7, 14

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Vagrant Friday, February 7, 14

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XHGui + Vagrant Friday, February 7, 14

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XHGui + Vagrant • Install VirtualBox Friday, February 7, 14

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XHGui + Vagrant • Install VirtualBox • Install Vagrant Friday, February 7, 14

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XHGui + Vagrant • Install VirtualBox • Install Vagrant • http://goo.gl/GS837H Friday, February 7, 14

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XHGui + Vagrant • Install VirtualBox • Install Vagrant • http://goo.gl/GS837H • vagrant up Friday, February 7, 14

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XHGui + Vagrant • Install VirtualBox • Install Vagrant • http://goo.gl/GS837H • vagrant up • http://localhost:8080 Friday, February 7, 14

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1100MB File Friday, February 7, 14

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xhprof.jkle.in Friday, February 7, 14

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Part 3: Analyzing Results Friday, February 7, 14

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PrestaShop Friday, February 7, 14

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ab -n 500 -c 10 www.foo.com Friday, February 7, 14

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Disclaimer: This might break stuff Friday, February 7, 14

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Wordpress Friday, February 7, 14

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Find Problem Areas Friday, February 7, 14

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Frequent Issues Friday, February 7, 14

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Frequent Issues • Translation Friday, February 7, 14

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Frequent Issues • Translation • Tight loops Friday, February 7, 14

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Frequent Issues • Translation • Tight loops • Configuration Friday, February 7, 14

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Frequent Issues • Translation • Tight loops • Configuration • Networked resources Friday, February 7, 14

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It’s Always the Database Friday, February 7, 14

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Workflow Friday, February 7, 14

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Workflow • Run XHProf Friday, February 7, 14

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Workflow • Run XHProf • Find expensive functions Friday, February 7, 14

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Workflow • Run XHProf • Find expensive functions • Instrument with StatsD (optional) Friday, February 7, 14

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Workflow • Run XHProf • Find expensive functions • Instrument with StatsD (optional) • See performance in prod (optional) Friday, February 7, 14

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Workflow • Run XHProf • Find expensive functions • Instrument with StatsD (optional) • See performance in prod (optional) • Optimize Friday, February 7, 14

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Interlude: Pro Tips Friday, February 7, 14

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Pro Tip #1: Sort by # of calls Friday, February 7, 14

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40 Listings Friday, February 7, 14

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Look for multiples of 40 Friday, February 7, 14

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Pro Tip #2: Turn off CPU Measurement Friday, February 7, 14

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Pro Tip #3: Call Graphs Friday, February 7, 14

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Pro Tip #4: Enable Via Query String Param Friday, February 7, 14

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Pro Tip #5: Comparing Runs Friday, February 7, 14

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Aside: xdebug vs. XHProf Friday, February 7, 14

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Advantages of XHProf Friday, February 7, 14

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Advantages of XHProf • Nicer UI Friday, February 7, 14

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Advantages of XHProf • Nicer UI • Share-ability Friday, February 7, 14

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Advantages of XHProf • Nicer UI • Share-ability • Ease of setup/configuration Friday, February 7, 14

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Advantages of XHProf • Nicer UI • Share-ability • Ease of setup/configuration • Hackability Friday, February 7, 14

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Part 4: Takeaways Friday, February 7, 14

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Profiling is Easy Friday, February 7, 14

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You Get What You Measure Friday, February 7, 14

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“Tools Not Rules” Friday, February 7, 14

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Get in Touch http://web-performance.meetup.com/ www.etsy.com/careers jonathan@etsy.com @jonathanklein Friday, February 7, 14