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? ? ????? JS ???? ??? ??? ? ?? ???? ??

??? ??? ? ?? ???? ??

Dec 28, 2024 pm 06:19 PM

??? ???? ???? ?? ????? JavaScript ??? ??? ? ????. SharedArrayBuffer? ?? ??? ?? ???? ???? ??? ?? ?? ??? ?? CPU ??? ??? ?????? ? ??????.

?? ????

?? ????? ???? ??? ????? ???? ?? Node.js ????? ????? ??? ??? ? ????. ??? ??? ???? JavaScript? ?? ???? ?? ????? ??? ? ?????.

??? ???? ?? ?? ??

1?? ??? ??
?? ??, ??? ?? ?? ??? ?? ??? ??? ??? ??? ? ??? ???? ??? ??? ??? ???? ?????? ?? ??? ??? ???? ?? ??? ? ????.

?:

const { Worker } = require('worker_threads');

function resizeImage(imagePath) {
  return new Promise((resolve, reject) => {
    const worker = new Worker('./resizeWorker.js', { workerData: imagePath });
    worker.on('message', resolve);
    worker.on('error', reject);
  });
}

// Usage
resizeImage('image.jpg').then(() => console.log('Image resized!'));

2?? ??? ?? ?? ? ??

??? JSON ??? ?? ????? CSV ???? ???? ???? ???? ?? ??? ? ????. ??? ???? ???? ??? ???? ??????? ???? ??? ? ????.

?:

const { Worker } = require('worker_threads');

const worker = new Worker('./dataParser.js');
worker.postMessage({ filePath: 'largeData.json' });
worker.on('message', (data) => {
  console.log('Parsed Data:', data);
});

3?? ??? ??

??? ???? ?? ??, ?? ?? ?? ?????? ?? ??? ??? ?????.

?:

const { Worker } = require('worker_threads');

function calculatePrimes(limit) {
  return new Promise((resolve, reject) => {
    const worker = new Worker('./primeWorker.js', { workerData: limit });
    worker.on('message', resolve);
    worker.on('error', reject);
  });
}

// Usage
calculatePrimes(100000).then(primes => console.log(primes));

?? ????? ?? ?? ??

1?? ? ?? ??

??????? ? ??? ???? ???? ?? ???? ?? ?? ?? ????? ???? ?? ????.

?:

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

exec('ls -l', (error, stdout, stderr) => {
  if (error) {
    console.error(`Error: ${error.message}`);
    return;
  }
  console.log(`Output:\n${stdout}`);
});

2?? ??????? ?? ???? ??

????? Python, Ruby ?? ?? ???? ??? ??? ?? ?? ????? ???? ??? ????? ???? ??? ??? ? ????.

?:

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

const pythonProcess = spawn('python', ['script.py']);

pythonProcess.stdout.on('data', (data) => {
  console.log(`Output: ${data}`);
});

3?? ??????? ????

???????? ?? ?? ????? ?? ????? ???? IPC(???? ? ??)? ?? ?? ????? ???? ???? ???? ??? ??? ? ????.

?:

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

const child = fork('./childService.js');

child.on('message', (message) => {
  console.log('Message from child:', message);
});

// Send a task to the child process
child.send({ task: 'processData', payload: [1, 2, 3] });

??? ???? ?? ???? ??? ??

Feature Worker Threads Child Processes
Memory Sharing Supported via SharedArrayBuffer Not supported
Task Isolation Shared environment, less isolated Fully isolated
Use Case CPU-intensive tasks in JavaScript System-level tasks or external code
Overhead Lower (same process) Higher (separate processes)
Communication Via message passing, faster Via IPC, slower
Supported Languages JavaScript/Node.js only Any scripting or system-level language
Startup Time Faster Slower
Error Containment Less contained, can crash the process Fully contained, isolated failures

??? ??? ? ?? ???? ?? ?? ??

? ???? ?? ????: CPU ??? ???? ??? ???? ???? I/O? ?? ???? ?? ???? ???? ?? ????? ?????.

? ?? ????: Node.js? ??? ?????? ?? ??? ???? ?? ??? ?????.

? ????? ?? ??: ??? ????? ?? ?? ? ?? ???? ?????.

? ???? ??: ??? ??? ???? ????? ???? ??? ?? ??? ?? ????? ?????.

??

??? ??? ? ?? ????? Node.js ???? ?? ??? ??? ??? ???? ??? ? ??? ?????. ??? ??? ???? CPU ? I/O ???? ??? ?? ?? ???? ???? ???? ??? ??????? ??? ? ????. ???? ????, ? ??? ????, ???????? ???? ??? ???? ?? ????? ???? ?? ??? ???? ?? Node.js ??????? ??? ????? ? ?????.

Understanding Worker Threads and Child Processes

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