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https://issues.apache.org/jira/browse/WICKET-6952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17485487#comment-17485487
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ASF GitHub Bot commented on WICKET-6952:
----------------------------------------
theigl edited a comment on pull request #497:
URL: https://github.com/apache/wicket/pull/497#issuecomment-1027288730
OK my previous benchmark was flawed because I created a new buffer for every
run. The new `isEmpty` method for `AppendingStringBuffer` is actually 40-50x
faster for medium-sized buffers.
```
Benchmark Mode Cnt Score Error
Units
StringsBenchmark.bufferFastIsEmpty thrpt 15 1918461027.579 ± 4949234.208
ops/s
StringsBenchmark.bufferIsEmpty thrpt 15 42567269.762 ± 40091.373
ops/s
StringsBenchmark.fastIsEmpty thrpt 15 1910306184.208 ± 4067311.978
ops/s
StringsBenchmark.isEmpty thrpt 15 1804225517.032 ± 1951669.787
ops/s
```
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> Performance improvements for Strings.isEmpty
> --------------------------------------------
>
> Key: WICKET-6952
> URL: https://issues.apache.org/jira/browse/WICKET-6952
> Project: Wicket
> Issue Type: Improvement
> Components: wicket-core
> Affects Versions: 9.7.0
> Reporter: Thomas Heigl
> Assignee: Thomas Heigl
> Priority: Minor
>
> {{Strings.isEmpty}} is one of the most called methods in our application and
> consistently shows up as hot in our production profiler.
> Two simple performance optimizations can be tried:
> - Overload the method with a {{String}} parameter, to help the JIT compiler
> with it's decision to inline the method
> - Avoid calling {{String.trim}} if the first character isn't whitespace
> See https://github.com/apache/wicket/pull/497.
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