// FAILS to create a shared buffer. 

  // Server needs COOP and COEP headers set

  // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#security_requirements

  const sharedBufferSize = 10;

  const buffer = new SharedArrayBuffer(

    Float32Array.BYTES_PER_ELEMENT * sharedBufferSize

  );

  // currently we can only send unshareable memory in p5js editor

  // const buffer = new Float32Array(sharedBufferSize);

  // create some workers

  // resolve the p5js generated url for worker.js

  const workerUrl = resolveEditorUrl("/worker.js");

​

  const workers=  []

  for(let i = 0; i < 2; i++) 

    workers.push(createWorker(workerUrl, { num: i+1, buffer }))

  // resolve all workers in parallel

  Promise.all(workers)

    .then((x) => console.log(x));

}

​

// need to resolve the p5js-editor url to create the worker

function resolveEditorUrl(filePath) {

  for (let previewUrl in objectUrls) {

    const editorFilePath = objectUrls[previewUrl];

    if (filePath == editorFilePath) {

      return previewUrl;

    }

  }

}

​

function createWorker(workerUrl, message) {

  const worker = new Worker(workerUrl);

  return new Promise((s, r) => {

    worker.onmessage = (e) => s(e.data);

    worker.onerror = r;

    worker.postMessage(message);

  })

  // .finally(() => worker.terminate());

}

​

​