Method generatePolyfillsChunkCached

src/index.js:226–243

(polyfills, cwd, polyfillsFilename, timings)

  }

  async generatePolyfillsChunkCached (polyfills, cwd, polyfillsFilename, timings) {
    const polyfillsKey = polyfills.join('\n');

    let generatePolyfills = this.polyfillsCache.get(polyfillsKey);
    if (!generatePolyfills) {
      generatePolyfills = this.generatePolyfillsChunk(polyfills, cwd, timings);
      this.polyfillsCache.set(polyfillsKey, generatePolyfills);
    }

    const output = await generatePolyfills;

    return new SourceMapSource(
      output.code,
      polyfillsFilename,
      // @ts-ignore
      output.map
    );
  }

  /**
   * @todo Write cached polyfills chunk to disk