gecko-dev/dom/promise/tests/test_webassembly_compile_worker_terminate.js

const sampleURL = 'test_webassembly_compile_sample.wasm';

function spawnWork() {
  const N = 50;
  var arr = [];
  for (var i = 0; i < N; i++)
    arr.push(WebAssembly.compileStreaming(fetch(sampleURL)));
  Promise.all(arr).then(spawnWork);
}

spawnWork();
postMessage("ok");