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Go easier on the CPU when moto sqs is idle

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For our local development setup we have found that moto is using around 25% CPU constantly. Digging in with gdb it turned out that it was burning that CPU in the sleeping loop. Here i'm increasing the sleep by 10x which brings the idle CPU usage down by 10x (to ~2%).

I'm not familiar enough with the moto/sqs codebase to know if lengthening this sleep will have an adverse effect; however, in other Python dev I've noticed that (in Python 2.7 anyway..) Python threading won't context switch a thread until a sleep of at least 0.01 seconds is performed (shockingly long!). So based on this guesswork I suspect sleeping for 0.01 seconds won't cause any grief.
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jamesandres 2018-10-31 11:39:49 +00:00 committed by GitHub
parent a8bc7a608e
commit e38eea751f
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1 changed files with 1 additions and 1 deletions
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moto/sqs/models.py
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@ -534,7 +534,7 @@ class SQSBackend(BaseBackend):
break
import time
time.sleep(0.001)
time.sleep(0.01)
continue
previous_result_count = len(result)