Drawing performance is very low when scrolling very fast using FastScroller
Closed this issue · 5 comments
When enabling the GPU Profiler on-screen bars we'll see the drawing performance. It stays nicely below/around the 60fps-mark when scrolling the RecyclerView directly.
But when using the FastScroller very fast, it'll show spikes and the app gets really laggy. This does not happen when scrolling slowly using the FastScroller.
This does not happen when scrolling fast using a fling on the RecyclerView itself.
It also does not happen in the standard-contacts-app (but I think they're using ListView?).
Does anyone have an idea on this issue?
Good question. It does show spiked, but I don't see it get laggy.
About the contacts app, I don't know.
Hello @hardysim, in my library I've added this base FastScroller, with thousands of items (normal, not with pictures...) it is smooth, I don't see any lags.
@davideas But do you see spikes in the GPU graph?
@AndroidDeveloperLB, yes I see them even if we are scrolling really fast from one small position to a high position and viceversa, but it's not laggy anyway.
OK, I looked more into it and I came to the conclusion that "really" laggy might be too much ;-) It gets the spikes and it gets some sort of lag but not that laggy that it's not usable anymore.
It seems that this sort of lag is not related to the lib but to the system itself (it has to render much more in such a case than when simply scrolling using a fling).
I'll close this here. Thanks for the feedback.