RFR(XS): 8229407: Avoid ConcurrentHashMap resizes during bootstrap

Daniel Fuchs daniel.fuchs at oracle.com
Mon Aug 12 11:03:34 UTC 2019

Hi Claes,

I'd suggest adding a comment such as:

// sized to 32 to avoid resizing during bootstrap

best regards (and no need for a new review if you
decide to take in my suggestion).

-- daniel

On 12/08/2019 11:13, Claes Redestad wrote:
> Hi core-libs,
> analysis shows that a handful of small ConcurrentHashMaps used during
> bootstrap is subject to some amount of resizing. Initializing these to
> slightly larger values improves startup metrics measurably on default
> images without regressing performance on minimal images.
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8229407
> Webrev: http://cr.openjdk.java.net/~redestad/8229407/webrev.00/
> Thanks!
> /Claes

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