I do indeed experience the HTML lag in all browsers on all computers I’ve tried it on. If you try opening the game linked above, don’t you get small lag spikes in the beginning that smooth out as you keep playing? I wanted to make a recording to show you exactly what I mean, but having a screen recording on made it very laggy, so I’ll skip that. Yeah, if you refresh the page things run a bit smoother, so maybe some of the warmup and caching could be done during the loading screen?
Thank you for the feedback! :]