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https://issues.apache.org/jira/browse/GROOVY-11842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Sun resolved GROOVY-11842.
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Fix Version/s: 6.0.0-alpha-1
5.0.5
Assignee: Jochen Theodorou
Resolution: Fixed
Merged and backported. Thanks a lot!
> Invokedynamic first invocation should not have a line with IndyInterface
> ------------------------------------------------------------------------
>
> Key: GROOVY-11842
> URL: https://issues.apache.org/jira/browse/GROOVY-11842
> Project: Groovy
> Issue Type: Improvement
> Reporter: Jochen Theodorou
> Assignee: Jochen Theodorou
> Priority: Major
> Labels: performance
> Fix For: 6.0.0-alpha-1, 5.0.5
>
> Attachments: improved_indy.svg, improved_indy_startup.svg,
> screenshot-1.png
>
>
> As can be seen in the IndyInterfaceUsageTest there is a stack trace element
> showing IndyInterface. This is bad for inlining and general performance.
> !improved_indy.svg!
> of course a programm like
> {code:Java}
> int foo(){1}
> int a
> for (int i=0; i<MAX; i++) {
> a = foo()
> }
> {code}
> is not much of a test for anything. It was supposed to show better inlining,
> but unlike Groovy 3 all later Groovy version fail to unroll the loop and
> eliminate the assignment to a for later executions. The graph though shows
> that the branch performance is better than Groov 3 or 4. Not only in the long
> run, but also on start. But be aware the graph above is from the 5th
> iteration of 1k calls to be able to see things more in scale. The first 4
> iterations of 1k calls look like this:
> !improved_indy_startup.svg!
> to actually be able to see differences the iteration size is now 100 calls
> and the y-axis is logarithmic. I want to especially point out how the
> no-primopts variant has similar initial cost as indy.
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