Swoole 4: Introducing the New Coroutine Design Pattern in PHP

Transcript

1. 4:
   Introducing the New Coroutine Design Pattern in PHP
   Demin Yin
   

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2. About Me
   • Staff Engineer and Technical Lead on Glu Mobile’s Design Home team
   • Playing with PHP since 2000.
   • Worked for a diverse group of companies in China and US, including eBay, Visa and Glu
   • Focus on building high performance, secure web services
   • Born in China, worked in U.S., live in Canada
   • On twitter: @deminy
   • On Github: https://github.com/deminy
   2
   

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3. Agenda
   • What Is Swoole?
   • Benchmark Results
   • Swoole 4: Asynchronous Programming with Coroutines
   • Top Swoole Use Cases
   • History of Swoole, and What's New in Swoole 4
   • The Future of Swoole
   • Q & A
   3
   

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4. Agenda
   • What Is Swoole?
   • Benchmark Results
   • Swoole 4: Asynchronous Programming with Coroutines
   • Top Swoole Use Cases
   • History of Swoole, and What's New in Swoole 4
   • The Future of Swoole
   • Q & A
   4
   

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5. What Is Swoole: How Does Swoole Work?
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   under PHP-FPM under Swoole
   

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6. 6
   • Event-driven; asynchronous I/O.
   • Coroutines, channels, defer, and more.
   • Connection pool.
   • Build high performance, concurrent HTTP, WebSocket, TCP, UDP, Unix socket services.
   What Is Swoole:
   Enrich PHP with Some Amazing Features
   

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7. Agenda
   7
   • What Is Swoole?
   • Benchmark Results
   • Swoole 4: Asynchronous Programming with Coroutines
   • Top Swoole Use Cases
   • History of Swoole, and What's New in Swoole 4
   • The Future of Swoole
   • Q & A
   

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8. Benchmark Results: Single Query
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   Source: the TechEmpower Framework Benchmarks project
   best database-access responses per second, single query
   

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9. Benchmark Results: Multiple Queries
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   Source: the TechEmpower Framework Benchmarks project
   responses per second at 20 queries per request, 256 requests concurrently
   

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10. Benchmark Results: Fortunes
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    Source: the TechEmpower Framework Benchmarks project
    best fortunes responses per second
    

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11. Benchmark Results: Why Faster?
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    Why is Swoole faster?
    • Connection pool.
    • Extra operations when using PDO:
    • Message sent to MySQL server to deallocate the prepared statement when destroying a
    PDOStatement object.
    • Message sent to MySQL server to close the MySQL connection when destroying a PDO object.
    • ……
    

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12. Agenda
    12
    • What Is Swoole?
    • Benchmark Results
    • Swoole 4: Asynchronous Programming with Coroutines
    • Top Swoole Use Cases
    • History of Swoole, and What's New in Swoole 4
    • The Future of Swoole
    • Q & A
    

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13. Coroutine in Swoole 4: an example
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    under PHP under Swoole 4
    

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14. Coroutine in Swoole 4: an example (cont.)
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    under PHP under Swoole 4
    

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15. output: 123456
    Coroutine in Swoole 4: an example (cont.)
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16. Processes, Threads, and Coroutines
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    Multiprocessing Multithreading Coroutine
    Creation fork() pthread_create() go()
    Scheduling expensive cheap extremely cheap
    Concurrency hundreds thousands hundreds of thousands
    Programming difficult very difficult easy
    

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17. Create a Server Socket in PHP
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    under PHP
    

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18. Create a Server Socket in Swoole 4
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    under Swoole 4
    

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19. Coroutine: What’s the benefits?
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    • A coroutine can be paused when IO happens, and resumed after IO finishes.
    • PHP code still executed in sequential manner.
    • No new processes or threads created. Low costs on “scheduling”.
    • No locks needed when updating shared resources from different coroutines.
    • High concurrency.
    • Easier to use, especially when comparing to asynchronous callbacks.
    

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20. Coroutines in For Loop
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21. Nested Coroutines
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22. Nested Coroutines (cont.)
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23. Nested Coroutines (cont.)
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    output: 127983465 output: 123456789
    

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24. Blocking I/O in PHP
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    • PHP extension MySQLi, PDO: \Swoole\Coroutine\MySQL
    • PHP extension Redis: \Swoole\Coroutine\Redis
    • sleep(), usleep() : …
    • sockets and streams: …
    • file_get_contents(), fread(), fwrite() : …
    • ……
    • PHP extension SOAP.
    • PHP extension MongoDB.
    

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25. Swoole 4: Channels
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26. Swoole 4: Channels (cont.)
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    SplQueue Channels
    push()
    SplQueue>push()
    Always successful until
    memory exhausted.
    chan::push()
    Blocks if running out of
    allocated space.
    pop()
    SplQueue>pop()
    Throws an exception
    when the queue is empty.
    chan::pop()
    Blocks if no data available.
    

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27. Swoole 4: Channels (cont.)
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28. Swoole 4: defer
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29. Swoole 4: defer (cont.)
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    Golang (pseudocode) PHP (pseudocode)
    

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30. Agenda
    30
    • What Is Swoole?
    • Benchmark Results
    • Swoole 4: Asynchronous Programming with Coroutines
    • Top Swoole Use Cases
    • History of Swoole, and What's New in Swoole 4
    • The Future of Swoole
    • Q & A
    

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31. Top Swoole Use Cases
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    • Crawlers.
    • HTTP/RPC.
    • IM, online chat room.
    • Internet of things.
    • Gaming servers.
    

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32. Agenda
    32
    • What Is Swoole?
    • Benchmark Results
    • Swoole 4: Asynchronous Programming with Coroutines
    • Top Swoole Use Cases
    • History of Swoole, and What's New in Swoole 4
    • The Future of Swoole
    • Q & A
    

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33. History of Swoole
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    • 2012-07: First Git commit.
    • 2013-04: Swoole 1 released.
    • 2016-12: Swoole 2 released.
    • 2018-06: Swoole 4 released.
    

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34. The Future of Swoole (cont.)
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    A dedicated development team for the Swoole ecosystem, with more supports to the open
    source community:
    • SDLC process improvements.
    • Improved documentation.
    • Lots of refactors.
    • More components like ZooKeeper, Kafka, Hadoop, HBase, etcd, grpc, AMQP, MQTT, etc.
    

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35. Swoole 4.1
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    • 4.1.0: Added stream hook: support asynchronous IO on Redis, PDO, MySQLi.
    • 4.1.2: Added socket hook: allow building coroutine versions of PHP extensions for
    MongoDB, ZooKeeper and more.
    

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36. Swoole 4.1: Stream Hook
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37. Swoole 4.1: Stream Hook (cont.)
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38. Swoole 4.1: Stream Hook (cont.)
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    ≈
    

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39. Agenda
    39
    • What Is Swoole?
    • Benchmark Results
    • Swoole 4: Asynchronous Programming with Coroutines
    • Top Swoole Use Cases
    • History of Swoole, and What's New in Swoole 4
    • The Future of Swoole
    • Q & A
    

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40. The Future of Swoole
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    • Latest stable release: 4.3.0
    • Swoole 5.0
    • Coroutines only.
    • Clean up legacy code.
    

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41. The Future of Swoole (cont.)
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    lots of changes in Swoole since 2018
    Source: https://github.com/swoole/swoole-src/graphs/contributors
    

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42. Resources
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    • Sample code of this talk: https://github.com/deminy/swoole-by-examples
    • Swoole: https://github.com/swoole/swoole-src
    • Swoole frameworks:
    • https://github.com/zendframework/zend-expressive-swoole
    • https://github.com/easy-swoole/easyswoole
    • https://github.com/swoft-cloud/swoft/
    • https://github.com/swooletw/awesome-swoole
    

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43. 43
    QUESTIONS?
    

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44. 44
    Thanks
    Demin Yin
    Email: demin.yin@glu.com
    Twitter: @deminy
    GitHub: https://github.com/deminy
    

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