Stable release: Improvements for Construct Game Services, desktop exports, 9-patch, performance, and lots more.
Have you tried using Chrome beta/dev/canary? There have been some Chrome-side performance improvements for this very recently (see this issue). It might also be worth trying setting the renderer back to WebGL, as work to optimise WebGPU to be as fast as WebGL in this case is also ongoing (see also this issue).