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arcade.gl.query.__exit__
extremely slow
#2363
Comments
Thanks for bringing this to our attention. The link to your repository doesn't work at the mo. Secondly, I wonder if you could also provide the top functions by the highest average time rather than the highest total time given that the method was called 30000+ times, which means each call takes around 0.5 ms to complete (admittedly not insignificant but it will be interesting to see the slowest methods aswell) |
I strongly suspect this isn’t anything Arcade can really do about it. My guess is this is just the result of the GL querying being slow, querying blocks the pipeline in GL and is generally a pretty expensive operation to perform. Would need more in depth profiling to determine the exact function call eating the bulk of the time, but I strongly suspect that it’s one of the GL query operations. If it is that, the performance can vary a decent bit between different hardware/drivers as well. |
It's unsurprising that this particular exit method takes a while. multiple gl calls are made per property queried. Given that these are getting information directly from the GPU, they are probably blocking methods, which will cause your program to hang until the GPU responds. If you are querying large or complex gl operations such as data transfers, then you will have to wait for that whole process to finish rather than continuing immediately and letting it complete in the background. From my investigation, no internal arcade process uses the Query object, so if it isn't critical to your applications functionality, it might be better to disable it when not debugging. |
It likely needs to wait for the rendering queue to process the call you are measuring to obtain the query info. If there are many things already in the queue it also needs to wait for those to complete. |
Thanks for your responses.
cProfile doesn't support sorting by time percall. And most of the ones that take up the most time aren't really revelant anyways, because they are only called once. However, the update function of the main game takes about 0.026 seconds to complete and is called 163 times, but that's really all that's significant.
I tried commenting it out, but collision checking stopped working. Are you referring to something else? |
It seems it's being called when checking for collisions. I've added custom collision detection using AABBs and it has replaced arcade.gl.query as the slowest method. |
Bug Report
When profiling my code, I found out that
arcade.gl.query.__exit__
was taking up the vast majority of my performance time, more than four times than anything else. It doesn't seem right that an__exit__
function should take this long, and my project is running slowly because of this. I'm surprised this hasn't been brought up before, and it may be a problem with my code.System Info
Steps to reproduce/example code:
My project is located at https://github.com/eschan145/SpaceShooter.
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