Robert Burke created BEAM-4727:
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Summary: Reduce metrics overhead
Key: BEAM-4727
URL: https://issues.apache.org/jira/browse/BEAM-4727
Project: Beam
Issue Type: Sub-task
Components: sdk-go
Reporter: Robert Burke
Assignee: Robert Burke
There are a few opportunities to avoid metrics overhead.
First when setting state in the context, we allocate a new one for the stored
value, per element. This generates a fair amount of objects for the garbage
collector too. If we retain and re-use contexts within a bundle, we would have
the opportunity to save on these costs.
Also, it's possible that we have overhead on the metric updating paths. We can
possibly do better than the general sync.Map, and avoid the type assertion cost
for extracting values of known types from the maps.
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