RFC: JDK-8031043: ClassValue's backing map should have a smaller initial size

[Charles Oliver Nutter]

It depends how JRuby is deployed. If the same code runs in every JRuby
runtime, then there would be one value attached to a given class per
runtime. Generally, this does not exceed a few dozen JRuby instances
for an individual app, and most folks don't deploy more than a few
apps in a given JVM.

- Charlie

On Thu, Jan 9, 2014 at 1:16 PM, Christian Thalinger
<christian.thalinger at oracle.com> wrote:
>
> On Jan 9, 2014, at 2:46 AM, Jochen Theodorou <blackdrag at gmx.org> wrote:
>
>> Am 08.01.2014 21:45, schrieb Christian Thalinger:
>> [...]
>>> If we’d go with an initial value of 1 would it be a performance problem for you if it grows automatically?
>>
>> that means the map will have to grow for hundreds of classes at startup.
>> I don't know how much impact that will have
>
> If it’s only hundreds it’s probably negligible.  You could do a simple experiment if you are worried:  change ClassValueMap.INITIAL_ENTRIES to 1, compile it and prepend it to the bootclasspath.
>
>>
>> bye Jochen
>>
>> --
>> Jochen "blackdrag" Theodorou - Groovy Project Tech Lead
>> blog: http://blackdragsview.blogspot.com/
>> german groovy discussion newsgroup: de.comp.lang.misc
>> For Groovy programming sources visit http://groovy-lang.org
>>
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