Performance is no more a curse

I bet you are writing unit tests for your apps; if not, you probably feel ashamed. But what about performance? Everyone is talking about it but very few people actually integrate performance into their development workflow... After some quick theory, I will show you how to use Blackfire that makes it so easy to profile your apps that you won't have any more excuses anymore for not doing it. Finally, I will talk about my new holy grail: Continuous Performance Profiling.

Transcript

1. Performance is no more a curse
 with RomainNeutron https://www.flickr.com/photos/latitudes/348189242
2. Romain Neutron 
 
 
 Blackfire.io developer
 OpenSource contributor
 
 https://github.com/romainneutron https://twitter.com/romainneutron
3. Why Profiling? https://www.flickr.com/photos/latitudes/348189242
4. https://www.flickr.com/photos/latitudes/348189242 Performance means Resources Less CPU Less Memory Less Network Less Servers ...
 Sustainable computing
5. 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
6. abandon a website that takes more than 3 seconds to load 40% of users
7. -100ms +1%
 revenue -2.2s +15%
 downloads
8. Performance as a feature https://www.flickr.com/photos/jprovost/5733297977
9. Profiling Benchmarking Load-testing Monitoring https://www.flickr.com/photos/fallsroad/13240207
10. Performance?
11. microtime() https://www.flickr.com/photos/rainriver/6967744353
12. Instrumentation https://www.flickr.com/photos/dlajholt/4939986995/
13. Wall Clock Time https://www.flickr.com/photos/guiseiz/6094701062
14. function foo()
 { bar();
 echo 'foo';
 }
 foo(); Wall-Clock Time
15. function foo()
 { bar();
 echo 'foo';
 }
 foo(); Inclusive Time
16. Inclusive Time Critical path of an app
17. function foo()
 { bar();
 echo 'foo';
 }
 foo(); Exclusive Time
18. Exclusive Time Find the functions to optimize first
19. Wall Time = CPU + I/O I/O = Network + Disk
20. Memory
21. Call Graph Profiler
22. 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
23. 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
24. LA DEMO
25. Continuous Performance
26. Performance Tests https://www.flickr.com/photos/garrett/2548828323/
27. # ~/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
28. # ~/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
29. Try it today! @blackfireio #blackfireio OSLEZMEETUP092015