title: How Can I reduce one download time, when I have two webwork to download the same file?
body: <p>In my web module, I have two webwork, one webwork to decode audio, another to encode audio.
  In each webwork, I need to download a same wasm code(by now, I don't want to split the code). I want to know whether there is  a method that I can download once(like cache), and each webwork can use the code?</p>