HTML input performance problem

Development Platform & Builds
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1

Hi,

I’ve made some sort of app, for mobile and web. It works perfect on mobile but while I’m running it in browser,
it causes one but big problem. At the beginning all seems to be ok, but after a few seconds it is nearly impossible
to make a “swipe” movement. Im not sure whats going on, but it seems that I have not enough ticks or something
like that. It’s probably some kind of performance problem but how to check whats going on? There’s no build in
profiler here or any other tool :confused:

Any suggestions?

The project you will find HERE

2

Btw. its not about performance of rendering, because if I make very short swipe it works quite good. It seems that it’s all about catching a mouse input.

3

Bumping the topic

4

Took a peek with gecko profiler, which is the tool we use for profiling Firefox Nightly performance. The profiler can be found here: Performance — Firefox Source Docs documentation

The profile I got is here: Firefox Profiler

There’s three big performance hotspots, each of which I have seen happen in UE4 projects before (glBufferData, glUniform4fv, emscripten_get_now. There are fixes identified to each of these, hopefully UE 4.16 will have them.

Though like you mentioned, I also think that the drag issue is not performance related. One thing that does come to mind which can affect timing in HTML5 builds is to disable the “Smooth Frame Rate” and “Use Fixed Frame Rate” features, see this post: "Smooth Frame Rate" and "Use Fixed Frame Rate" should not be used in HTML 5 exports - Platform & Builds - Epic Developer Community Forums