whale-plus/lib/upload-sdk/src/upload-client/split/imp-work/MultiThreadSplitor.js

A Component Library for Vue 3

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var ChunkSplitor = require('../ChunkSplitor.js');

const import_meta = {};
class MultiThreadSplitor extends ChunkSplitor.ChunkSplitor {
  constructor() {
    super(...arguments);
    this.workers = Array.from({
      length: navigator.hardwareConcurrency || 4
    }).fill(0).map(
      () => new Worker(new URL("./SplitWorker.ts", import_meta.url), {
        type: "module"
      })
    );
  }
  calcHash(chunks, emitter) {
    const workerSize = Math.ceil(chunks.length / this.workers.length);
    this.workers.forEach((worker, index) => {
      const start = index * workerSize;
      const end = Math.min((index + 1) * workerSize, chunks.length);
      const workerChunks = chunks.slice(start, end);
      worker.postMessage(workerChunks);
      worker.onmessage = (e) => {
        emitter.emit("chunks", e.data);
      };
    });
  }
  dispose() {
    this.workers.forEach((worker) => worker.terminate());
  }
}

exports.MultiThreadSplitor = MultiThreadSplitor;
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