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https://issues.apache.org/jira/browse/HDDS-2445?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Attila Doroszlai updated HDDS-2445:
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Status: Patch Available (was: In Progress)
> Replace ToStringBuilder in BlockData
> ------------------------------------
>
> Key: HDDS-2445
> URL: https://issues.apache.org/jira/browse/HDDS-2445
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Reporter: Attila Doroszlai
> Assignee: Attila Doroszlai
> Priority: Minor
> Labels: perfomance, pull-request-available
> Attachments: blockdata.png, setchunks.png
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> {{BlockData#toString}} uses {{ToStringBuilder}} for ease of implementation.
> This has a few problems:
> # {{ToStringBuilder}} uses {{StringBuffer}}, which is synchronized
> # the default buffer is 512 bytes, more than needed here
> # {{BlockID}} and {{ContainerBlockID}} both use another {{StringBuilder}} or
> {{StringBuffer}} for their {{toString}} implementation, leading to several
> allocations and copies
> The flame graph shows that {{BlockData#toString}} may be responsible for 1.5%
> of total allocations while putting keys.
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