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Performance is no more a curse
 with RomainNeutron https://www.flickr.com/photos/latitudes/348189242

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Romain Neutron 
 
 
 Blackfire.io developer
 OpenSource contributor
 
 https://github.com/romainneutron https://twitter.com/romainneutron

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Why Profiling? https://www.flickr.com/photos/latitudes/348189242

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https://www.flickr.com/photos/latitudes/348189242 Performance means Resources Less CPU Less Memory Less Network Less Servers ...
 Sustainable computing

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Performance means Business More repeat business More page views per visit Better conversions More revenue Increased user satisfaction ... http://www.slideshare.net/stoyan/the-business-of-performance

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abandon a website that takes more than 3 seconds to load 40% of users

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-100ms +1%
 revenue -2.2s +15%
 downloads

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Performance as a feature https://www.flickr.com/photos/jprovost/5733297977

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Profiling Benchmarking Load-testing Monitoring https://www.flickr.com/photos/fallsroad/13240207

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Performance?

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microtime() https://www.flickr.com/photos/rainriver/6967744353

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Instrumentation https://www.flickr.com/photos/dlajholt/4939986995/

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Wall Clock Time https://www.flickr.com/photos/guiseiz/6094701062

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function foo()
 { bar();
 echo 'foo';
 }
 foo(); Wall-Clock Time

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function foo()
 { bar();
 echo 'foo';
 }
 foo(); Inclusive Time

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Inclusive Time Critical path of an app

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function foo()
 { bar();
 echo 'foo';
 }
 foo(); Exclusive Time

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Exclusive Time Find the functions to optimize first

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Wall Time = CPU + I/O I/O = Network + Disk

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Memory

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Call Graph Profiler

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The easiest way to profile applications in the development but also in the production environment The best visualization tool for interpreting profiling traces for memory, CPU, I/O and for all languages* * Specific extension for PHP, callgrind for other languages

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Browser Companion PHP Probe Agent 10/ Upload aggregated profile 1/ Sign request 2/ Signed request 3/ Create profile 4/ Check signature 5/ Request 6/ Response 7/ Send profile 8/ Continue or stop 9/ Continue or stop Storage 11/ Store

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LA DEMO

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Continuous Performance

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Performance Tests https://www.flickr.com/photos/garrett/2548828323/

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# ~/workspace/projet/.blackfire.yml
 
 tests:
 "Pages should be fast enough":
 path: "/.*"
 assertions:
 - "main.wall_time < 300ms"
 - "main.memory < 50M"
 - "main.peak_memory < 75M"
 - "main.io < 20ms"
 - "main.cpu_time < 100ms"
 "Pages should not do too many SQL queries":
 path: "/.*"
 assertions:
 - "metrics.sql.queries.count <= 12"
 "Pages should be light":
 path: "/.*"
 assertions:
 - "metrics.output.network_out < 100KB"
 "Pages should not become slower":
 path: "/.*"
 assertions:
 - "percent(main.wall_time) < 10%"
 - "diff(metrics.sql.queries.count) < 2"
 .blackfire.yml

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# ~/workspace/projet/.blackfire.yml
 
 tests:
 "Page should not tag a graph":
 path: ".*"
 assertions:
 - “metrics.process.run.count == 0"
 
 metrics:
 process.run:
 label: “Run a process"
 layer: ~
 matching_calls:
 php:
 - callee: “=proc_open" Custom Metrics

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Try it today! @blackfireio #blackfireio OSLEZMEETUP092015