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Profiling PHP Sebastian Grodzicki
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Sebastian Grodzicki CTO @ SHOWROOM
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abandon a website that takes more than 3 seconds to load 40% of users
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Amazon -100 ms = +1% revenue
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Google +500 ms = -25% searches
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– Steve Souders „80-90% of the end-user response time is spent on the frontend. Start There.” Performance Golden Rule
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Profiling: a way to measure where a program spends time.
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microtime()
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Xdebug
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xdebug.profiler_enable_trigger = 1 http://url?XDEBUG_PROFILE=1
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KCachegrind
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Webgrind
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XHProf
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XHProf
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Blackfire
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There’s a Blackfire Edition for any developer
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Blackfire Wall time I/O CPU Memory Network SQL
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Time Wall time I/O CPU Disk I/O Network = = + +
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Inclusive vs Exclusive Time function foo() { $str = bar(); return $str; } function foo() { $str = bar(); return $str; }
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Continuous Performance Testing
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Assertions
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Test Scenarios
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Callgraphs
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Hot paths, exclusive time & inclusive time
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Compare & iterate
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DEMO
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goo.gl/E2H1D6
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blackfire.io/docs/24-days
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