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https://issues.apache.org/jira/browse/KAFKA-5515?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bill Bejeck updated KAFKA-5515:
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Description: Currently the {{Segments}} class uses a date when calculating
the segment id and uses {{SimpleDateFormat}} for formatting the segment id.
However this is a high volume code path and creating a new {{SimpleDateFormat}}
for each segment id is expensive. We should look into removing the date from
the segment id or at a minimum use a faster alternative to
{{SimpleDateFormat}}. We should also consider keeping a lookup of existing
segments to avoid as many string operations as possible. (was: Currently the
{{Segments}} class uses a date when calculating the segment id and uses
{{SimpleDateFormat}} for formatting the segment id. However this is a high
volume code path and creating a new {{SimpleDateFormat}} for each segment id is
expensive. We should look into removing the date from the segment id or at a
minimum use a faster alternative to {{SimpleDateFormat}} )
> Consider removing date formatting from Segments class
> -----------------------------------------------------
>
> Key: KAFKA-5515
> URL: https://issues.apache.org/jira/browse/KAFKA-5515
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Bill Bejeck
> Labels: performance
>
> Currently the {{Segments}} class uses a date when calculating the segment id
> and uses {{SimpleDateFormat}} for formatting the segment id. However this is
> a high volume code path and creating a new {{SimpleDateFormat}} for each
> segment id is expensive. We should look into removing the date from the
> segment id or at a minimum use a faster alternative to {{SimpleDateFormat}}.
> We should also consider keeping a lookup of existing segments to avoid as
> many string operations as possible.
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