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Bun Web vs PM2 Cluster (with Express web)

· 5 min read
Wayne
Wayne
Wayne

Bun.js 以高性能为卖点，而 PM2 可以提供nodejs作为服务的解决方案，而且支持cluster模式，可以最大限度的利用现代多核CPU性能。

但是我更关心 Bun.js 性能是否强到我来自己注册服务 来替换 PM2。

Bun​

Bun 是一个高性能的 JavaScript 运行时，旨在提供 Node.js 的功能，同时提供更快的启动速度和更小的内存占用。它支持 ES6 模块，TypeScript，以及原生的 WebAssembly。Bun 还内置了一个 HTTP 服务器，使得开发和部署 Web 应用程序变得更加简单。

  • 第一次运行
  █ TOTAL RESULTS 

    HTTP
    http_req_duration..............: avg=1.61ms min=274.48µs med=1.2ms max=39.05ms p(90)=2.77ms p(95)=3.87ms
      { expected_response:true }...: avg=1.61ms min=274.48µs med=1.2ms max=39.05ms p(90)=2.77ms p(95)=3.87ms
    http_req_failed................: 0.00%  0 out of 42199
    http_reqs......................: 42199  233.748209/s

    EXECUTION
    iteration_duration.............: avg=1s     min=1s       med=1s    max=1.04s   p(90)=1s     p(95)=1s    
    iterations.....................: 42199  233.748209/s
    vus............................: 4      min=4          max=500
    vus_max........................: 500    min=500        max=500

    NETWORK
    data_received..................: 6.2 MB 35 kB/s
    data_sent......................: 3.0 MB 16 kB/s




running (3m00.5s), 000/500 VUs, 42199 complete and 0 interrupted iterations
default ✓ [======================================] 000/500 VUs  3m0s
  • 第二次运行
  █ TOTAL RESULTS 

    HTTP
    http_req_duration..............: avg=1.62ms min=241.31µs med=1.2ms max=71.94ms p(90)=2.66ms p(95)=3.59ms
      { expected_response:true }...: avg=1.62ms min=241.31µs med=1.2ms max=71.94ms p(90)=2.66ms p(95)=3.59ms
    http_req_failed................: 0.00%  0 out of 42196
    http_reqs......................: 42196  233.695522/s

    EXECUTION
    iteration_duration.............: avg=1s     min=1s       med=1s    max=1.07s   p(90)=1s     p(95)=1s    
    iterations.....................: 42196  233.695522/s
    vus............................: 4      min=4          max=500
    vus_max........................: 500    min=500        max=500

    NETWORK
    data_received..................: 6.2 MB 35 kB/s
    data_sent......................: 3.0 MB 16 kB/s




running (3m00.6s), 000/500 VUs, 42196 complete and 0 interrupted iterations
default ✓ [======================================] 000/500 VUs  3m0s
  • 额外的运行
  █ TOTAL RESULTS 

    HTTP
    http_req_duration..............: avg=1.5ms min=232.55µs med=1.19ms max=59.78ms p(90)=2.51ms p(95)=3.3ms
      { expected_response:true }...: avg=1.5ms min=232.55µs med=1.19ms max=59.78ms p(90)=2.51ms p(95)=3.3ms
    http_req_failed................: 0.00%  0 out of 42205
    http_reqs......................: 42205  233.79981/s

    EXECUTION
    iteration_duration.............: avg=1s    min=1s       med=1s     max=1.06s   p(90)=1s     p(95)=1s   
    iterations.....................: 42205  233.79981/s
    vus............................: 4      min=4          max=500
    vus_max........................: 500    min=500        max=500

    NETWORK
    data_received..................: 6.2 MB 35 kB/s
    data_sent......................: 3.0 MB 16 kB/s




running (3m00.5s), 000/500 VUs, 42205 complete and 0 interrupted iterations
default ✓ [======================================] 000/500 VUs  3m0s

PM2​

PM2 是一个用于管理 Node.js 应用程序的进程管理器。它提供了自动重启、负载均衡、集群模式等功能，使得 Node.js 应用程序更加稳定和高效。PM2 还支持多种监控和日志记录功能，使得开发者可以更好地了解应用程序的运行状态。

  • 第一次运行
  █ TOTAL RESULTS 

    HTTP
    http_req_duration..............: avg=25.6ms min=704.67µs med=2.79ms max=2.75s p(90)=41.28ms p(95)=85.25ms
      { expected_response:true }...: avg=25.6ms min=704.67µs med=2.79ms max=2.75s p(90)=41.28ms p(95)=85.25ms
    http_req_failed................: 0.00%  0 out of 41171
    http_reqs......................: 41171  227.889771/s

    EXECUTION
    iteration_duration.............: avg=1.02s  min=1s       med=1s     max=3.77s p(90)=1.04s   p(95)=1.09s  
    iterations.....................: 41171  227.889771/s
    vus............................: 1      min=1          max=500
    vus_max........................: 500    min=500        max=500

    NETWORK
    data_received..................: 11 MB  60 kB/s
    data_sent......................: 2.9 MB 16 kB/s




running (3m00.7s), 000/500 VUs, 41171 complete and 0 interrupted iterations
default ✓ [======================================] 000/500 VUs  3m0s
  • 第二次运行
  █ TOTAL RESULTS 

    HTTP
    http_req_duration..............: avg=16.23ms min=662.87µs med=2.47ms max=636.8ms p(90)=34.98ms p(95)=78.24ms
      { expected_response:true }...: avg=16.23ms min=662.87µs med=2.47ms max=636.8ms p(90)=34.98ms p(95)=78.24ms
    http_req_failed................: 0.00%  0 out of 41540
    http_reqs......................: 41540  230.651456/s

    EXECUTION
    iteration_duration.............: avg=1.01s   min=1s       med=1s     max=1.63s   p(90)=1.03s   p(95)=1.08s  
    iterations.....................: 41540  230.651456/s
    vus............................: 3      min=3          max=500
    vus_max........................: 500    min=500        max=500

    NETWORK
    data_received..................: 11 MB  60 kB/s
    data_sent......................: 2.9 MB 16 kB/s




running (3m00.1s), 000/500 VUs, 41540 complete and 0 interrupted iterations
default ✓ [======================================] 000/500 VUs  3m0s

K6 Test Script​

import http from 'k6/http';
import { sleep } from 'k6';

export const options = {
  // Key configurations for Stress in this section
  stages: [
    { duration: '1m', target: 500 }, // traffic ramp-up from 1 to a higher 200 users over 10 minutes.
    { duration: '1m', target: 200 }, // stay at higher 200 users for 30 minutes
    { duration: '1m', target: 0 }, // ramp-down to 0 users
  ],
};

export default () => {
  const urlRes = http.get('http://localhost:5000');
  sleep(1);
  // MORE STEPS
  // Here you can have more steps or complex script
  // Step1
  // Step2
  // etc.
};

Conclusion​

Bun 的性能要远好于 PM2 Cluster（express）。其实 Bun 也不是运行在单线程下的，Bun会自动发起多个线程来处理请求。

而且 Bun 对于 Serverless 应用的兼容性非常好，可以很好的平替（Cloudflare worker）。

ref​