RFR: 8193066: Avoid use of capturing lambdas in JarFile

[Lance Andersen]

Hi Claes,

I think this looks good.  Thank you for making JarFile zippier ;-)

> On May 11, 2020, at 5:50 AM, Claes Redestad <claes.redestad at oracle.com> wrote:
> 
> Hi,
> 
> lambdas used in the interaction between JarFile and ZipFile can be
> avoided by having ZipFile call a shared secret in JarFile to create a
> JarFileEntry when appropriate. This removes an allocation per lookup.
> 
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8193066
> Webrev: http://cr.openjdk.java.net/~redestad/8193066/open.00/
> 
> Testing: tier1-2, verified a small per-op speed-up, significantly so
>         for negative lookups and during startup/warmup (10-20%
>         improvements when interpreting)
> 
> Thanks!
> 
> /Claes

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 <http://oracle.com/us/design/oracle-email-sig-198324.gif>Lance Andersen| Principal Member of Technical Staff | +1.781.442.2037
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