Dandandan opened a new pull request #698:
URL: https://github.com/apache/arrow-datafusion/pull/698
# Which issue does this PR close?
Closes #697
# Rationale for this change
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Currently, when polling for work, the executor always waits 250 ms in
between polling for tasks.
This means if the tasks themselves are small, it can be unproductive for a
large percent of the time.
We can track whether we received tasks in the last iterations to avoid
sleeping.
Also a slightly lower sleep time (e.g. 100ms) can help reduce the initial
delay.
# What changes are included in this PR?
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Keep track of whether we received some tasks last time. If it's the case we
don't sleep, otherwise we do.
Also reduce hard-coded 250 to 100ms to reduce initial delay a bit.
# Are there any user-facing changes?
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