Hmm that might also be contributing to dogshit Firefox performance on a web app of mine, I'm using that to store and fetch map tiles. Though that's all async so it shouldn't really matter in terms of rendering aside from having to wait a bit longer to retrieve.

But it already lags like fuck even without that part running or anything much at all, while being buttersmooth on Chrome almost regardless of how much I load up rendering. It infuriates me to hell because there is no optimization I can make to get equal or even usable performance.