Function transform

packages/computer/src/backends/worker-javascript/frames.ts:55–58

(chunk, controller)

  return source.pipeThrough(
    new TransformStream<Uint8Array, RuntimeFrame>({
      transform(chunk, controller) {
        buffer += decoder.decode(chunk, { stream: true });
        drain(controller, false);
      },
      flush(controller) {
        buffer += decoder.decode();
        drain(controller, true);