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
   

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2. Romain Neutron
   

   

   

   Blackfire.io developer

   OpenSource contributor

   

   https://github.com/romainneutron
   https://twitter.com/romainneutron
   

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

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

   Sustainable computing
   

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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
   

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

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7. -100ms
   +1%

   revenue
   -2.2s
   +15%

   downloads
   

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

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

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10. Performance?
    

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

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

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

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14. function foo()

    {
    bar();

    echo 'foo';

    }

    foo();
    Wall-Clock Time
    

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15. function foo()

    {
    bar();

    echo 'foo';

    }

    foo();
    Inclusive Time
    

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16. Inclusive Time
    Critical path of an app
    

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17. function foo()

    {
    bar();

    echo 'foo';

    }

    foo();
    Exclusive Time
    

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18. Exclusive Time
    Find the functions to optimize first
    

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

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20. Memory
    

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21. Call Graph
    Profiler
    

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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
    

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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
    

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24. LA DEMO
    

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25. Continuous Performance
    

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

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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
    

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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
    

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29. Try it today!
    @blackfireio #blackfireio
    OSLEZMEETUP092015
    

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