FuRyanf opened a new pull request, #32379:
URL: https://github.com/apache/beam/pull/32379
This PR addresses the performance overhead caused by repeated string
concatenation in the toString() method of the MetricName and MetricKey classes.
The issue was identified as a significant contributor to CPU usage during
metric processing in Beam’s Samza integration.
To mitigate this, the toString() results for MetricName and MetricKey are
now cached. By storing the computed string representation on first access, we
eliminate redundant concatenation operations in subsequent calls. This change
reduces the computational cost associated with metrics processing, leading to
improved performance in scenarios with frequent metric updates.
------------------------
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