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Build Your High Concurrency App With PHP and Swoole

Build Your High Concurrency App With PHP and Swoole

Jomlaunch Asia 2021

Albert Chen

December 20, 2022
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  1. @JomLaunch 2021
    Build your High Concurrency App
    with PHP and Swoole
    Albert Chen

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  2. About Me
    {

    "data": {

    "human": {

    "name": "Albert Chen",

    "occupation": "Software Architect",

    "website": "https://albert-chen.com",

    "interests": [

    "traveling",

    "programming",

    "cooking"

    ]

    },

    "tags": [

    "Laravel Artisan",

    "Swoole Enthusiast",

    "Open Source Contributor"

    ]

    }

    }

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  3. Outline
    • Introduction of Swoole

    • PHP’s Internal Lifecycle

    • Blocking I/O in PHP

    • Server Structure of Swoole

    • Benchmark of Swoole

    • Coroutine in Swoole

    • Some Facts about Swoole

    • Q&A

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  4. Slido
    Join at

    slido.com
    #760920

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  5. Slido
    Join at


    slido.com
    #760920

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  6. What is Swoole?

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  8. What is Swoole?
    • Since 2012

    • Open source based on Apache-2.0 License

    • 17k stars until July 2021

    • More than 100 contributors

    • Adopted by many enterprises in China

    • O
    ffi
    cially supported by Laravel Octane

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  9. What is Swoole?
    • A C extension for PHP

    • An asynchronous network engine for PHP

    • Features:

    • Event-driven non-blocking I/O

    • HTTP / HTTP2 / Websocket / TCP / UDP

    • Coroutine (CSP Model)

    • Excellent performance for high concurrency

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  10. What is Swoole?
    • Not a new language, but an extension for PHP

    • Provides many new features for traditional PHP

    • New lifecycle in Swoole

    • Server patterns, coroutine, async I/O, Process Management, etc.

    • It's still under active development

    • Stable for production environment

    • High performance

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  11. Usage Statistics for Websites

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  12. PHP’s Benchmark
    https://kinsta.com/blog/php-benchmarks/

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  13. Benchmark Comparison
    https://www.toptal.com/back-end/server-side-io-performance-node-php-java-go

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  14. Why PHP Performs
    Poorly in High Concurrency?

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  15. PHP Lifecycle

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  16. How many files are required for one
    request in Laravel?
    426
    get_included_files()

    In Laravel 8.52

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  17. Stateless PHP
    • How do we serve PHP today?

    • PHP-FPM

    • mod_php for Apache

    • Both patterns are all stateless

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  18. Stateless PHP
    • Pros
    • Easy scaling

    • Simple, less risk causing memory leaks

    • Cons
    • States can't be shared between requests

    • States must rely on external storages

    • Resources can't be reused e
    ffi
    ciently

    • Connection cost is expensive (like database)

    • Not good for high performance

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  19. Blocking I/O in PHP
    • PHP is originally created as glue layer to call C functions

    • The I/O model is blocking by default

    • Almost all client-side libraries involving I/O are blocking

    • Multiple process for handling blocking I/O

    • I/O bound concurrency depends on process number

    • Cost for context switch in processes is expensive

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  20. Blocking I/O in PHP
    • Resource can't be reused

    • I/O requests are blocking

    • 80% time cost on blocking I/O

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  21. Blocking I/O in PHP

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  22. Event Loop in NodeJS

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  23. Concurrency Problem
    • 100 requests at the same time need 100 processes

    • 100 connections will be established as well

    • Scale to increase concurrency

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  24. Let’s See What Changes
    in Swoole

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  25. Server Structure in Swoole

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  26. PHP Lifecycle in Swoole
    Run only once!

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  27. Server Structure in Swoole
    • Code Is Persistent in Memory

    • Swoole Server Takes Lifecycle Over PHP

    • Reduce Initialization Steps

    • Reduce Response Latency

    • Event-driven Non-blocking I/O for Requests

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  28. Benchmark Comparison
    between Go and Swoole

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  29. Server Benchmark in Go

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  30. Server Benchmark in Go

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  31. Server Benchmark in PHP

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  32. Server Benchmark in PHP

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  33. This Doesn’t Mean
    PHP with Swoole is Faster Than Go
    (Of Course Not)

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  34. Coroutine in Swoole

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  35. Coroutine in Swoole
    • Non-Blocking I/Os are scheduled by coroutine automatically.
    PHP is the best

    Swoole is awesome!

    Hello world!

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  36. Coroutine in Swoole
    Hello Swoole

    1.2.3.4

    • Non-Blocking I/Os are scheduled by coroutine automatically.

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  37. Coroutine in Swoole
    1.2.3.4

    1.2.3.4

    1.2.3.4

    1.2.3.4



    Hello Swoole!

    • Non-Blocking I/Os are scheduled by coroutine automatically.

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  38. Coroutine in Swoole
    Hello Swoole!

    1.2.3.4

    1.2.3.4

    1.2.3.4

    1.2.3.4



    • Non-Blocking I/Os are scheduled by coroutine automatically.

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  39. Coroutine in Swoole
    • CSP Model
    1

    2

    3

    4

    5

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  40. Some Facts about Swoole
    • Most of traditional PHP projects needs to be refactored.

    • Convert requests and responses

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  41. Some Facts about Swoole
    • Global states in PHP needs to be used more carefully. (eg. $_GET,
    $_POST, static, global)

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  42. Some Facts about Swoole
    • Global states in PHP needs to be used more carefully. (eg. $_GET,
    $_POST, static, global)

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  43. Some Facts about Swoole
    • Don’t use exit/die function in your PHP application.

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  44. Some Facts about Swoole
    • Memory leak may happen!!!

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  45. Some Facts about Swoole
    • You can try Hyperf framework for your new projects.
    Hyperf = Hyperspeed + Flexibility
    https://www.hyperf.io

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  46. Some Facts about Swoole
    • Swoole is now o
    ffi
    cially supported by Laravel team.

    • Laravel will become friendly in long-running server

    • Some Octane features rely on Swoole

    • No coroutine features are supported yet

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  47. Some Facts about Swoole
    • There’s knowledge gap for traditional PHP developers.

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  48. Q&A

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