I'm not using drawImage. You're right - it's way too slow. I copy the canvas buffer array and put on pixel by pixel to that array. It's only using a low amount of percentage of your CPU because it's single threaded and probably using 100% of one core. I need to look into WebGL for sure. I just like working out the math for these myself, but I gotta stop doing that and start using at least a graphics library or maybe even a game library. I'll check out ArrowBench, thanks!