github-featured / nrwl--nx

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  • 20.5.0-beta.0 5721ea3c21
    比较

    feat(core): lock graph creation when running in another process (#29408)

    frostbyte_neo 发布于 2025-01-28 14:46:52 +00:00

    Current Behavior

    Running Nx in multiple processes at the same time with the daemon
    disabled can cripple a system due to excess memory usage when creating
    the graph. This is due to plugin workers being started per-parent
    process when there is no daemon. This change enables a file lock to
    prevent the simultaneous processing, and read from the cache when the
    first run completes.

    Currently, running nx show projects 30 times in parallel looks
    something like this:

    30 processes exited within 37535ms

    Expected Behavior

    30 processes exited within 6435ms

    Test Script

    //@ts-check

const { spawn } = require('child_process');

let alive = new Set();

let start = Date.now();
let iterations = 30;

for (let i = 0; i < iterations; i++) {
  const cp = spawn('npx nx show projects', [], {
    shell: true,
    env: {
      ...process.env,
      NX_DAEMON: 'false',
      NX_VERBOSE_LOGGING: 'true',
    },
  });
  alive.add(i);
  //   cp.stdout.on('data', (data) => {
  //     console.log(`stdout [${i}]: ${data}`);
  //   });
  cp.stderr.on('data', (data) => {
    console.error(`stderr [${i}]: ${data}`);
  });
  cp.on('exit', (code) => {
    console.log(`child process ${i} exited with code ${code}`);
    alive.delete(i);
  });
}

const i = setInterval(() => {
  if (alive.size > 0) {
  } else {
    clearInterval(i);
    console.log(
      `${iterations} processes exited within ${Date.now() - start}ms`
    );
  }
}, 1);
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