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Posted to commits@beam.apache.org by "Robert Burke (JIRA)" <ji...@apache.org> on 2018/07/03 19:53:00 UTC

[jira] [Created] (BEAM-4727) Reduce metrics overhead

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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