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https://issues.apache.org/jira/browse/FLINK-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fabian Hueske closed FLINK-2882.
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Resolution: Fixed
Fix Version/s: 1.0.0
Fixed with b9ce8abb1bfc0cbc43e8c1800b4aeb7aee7c6e62
> Improve performance of string conversions
> -----------------------------------------
>
> Key: FLINK-2882
> URL: https://issues.apache.org/jira/browse/FLINK-2882
> Project: Flink
> Issue Type: Improvement
> Components: Core
> Affects Versions: 0.10.0
> Reporter: Greg Hogan
> Assignee: Greg Hogan
> Fix For: 1.0.0
>
>
> {{AbstractID.toString()}} and {{AbstractID.toShortString()}} call
> {{StringUtils.byteToHexString(...)}} which uses a StringBuilder to convert
> from binary to hex. This is a hotspot when scaling the number of workers.
> While testing on my single node with parallelism=512 jvisualvm reports
> 600,000 calls taking 13.4 seconds. Improving
> {{StringUtils.byteToHexString(...)}} reduces the time to 1.3 seconds.
> Additionally memoizing the string values in {{AbstractID}} reduce the time to
> 350 ms and the number of calls to {{StringUtils.byteToHexString(...)}} to
> ~1000.
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