ref: f1904837d4899a92c0beeef674a4efe772b2534d
dir: /readme/
threadpool Thread pool experiments. - main1: channel-based task queue - main2: rendezvous point task queue - main3: qlocked task queue - main4: channel-based memimage line raster task - main5: channel-based memimage block raster task - main6: main4 with counted task execution - main7: main5 with counted task execution