Pool analyzer diagnostic reporters#39034
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agocke merged 1 commit intodotnet:masterfrom Oct 9, 2019
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This has shown up as a significant source of allocations. The design here is that when an analyzer reports a diagnostic we may need to filter or alter it based on some configuration. Previously we stored the configuration information by closing over captured variables, but that could be very expensive if it's being done for every analyzer invocation. Since we can only really execute one analyzer per running thread on the machine, the actual number of concurrent objects we need to create is approximately the number of running threads. Pooling is a good solution to this problem.
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This has shown up as a significant source of allocations. The design
here is that when an analyzer reports a diagnostic we may need to filter
or alter it based on some configuration. Previously we stored the
configuration information by closing over captured variables, but that
could be very expensive if it's being done for every analyzer
invocation. Since we can only really execute one analyzer per running
thread on the machine, the actual number of concurrent objects we need
to create is approximately the number of running threads. Pooling is a
good solution to this problem.
Before:
After:
Note: I don't think this is that much faster -- my machine wasn't completely quiet during the noise measurements, but I do believe that bytes allocated is accurate and a significant improvement.