8252827: Caching Integer.toString just like Integer.valueOf

Raffaello Giulietti raffaello.giulietti at gmail.com
Sat Apr 17 09:06:26 UTC 2021

On 2021-04-17 07:07, David Holmes wrote:
> On 17/04/2021 4:54 am, Raffaello Giulietti wrote:
>> I guess the reporter meant to limit the cache range similarly to the 
>> one used for valueOf().
>> I have no clue about the benefit/cost ratio for the proposed String 
>> cache. It really depends on usage, workload, etc. One can easily 
>> imagine both extreme scenarios but it's hard to tell how the average 
>> one would look.
>> My post is only about either solving the issue by implementing the 
>> cache, which I can contribute to; or closing it because of lack of 
>> real-world need or interest.
> Caching for the sake of caching is not an objective in itself. Unless 
> the caching can be shown to solve a real problem, and the strategy for 
> managing the cache is well-defined, then I would just close the 
> enhancement request. (Historically whether an issue we don't have any 
> firm plans to address is just left open "forever" or closed, depends 
> very much on who does the bug triaging in that area. :) )
> Cheers,
> David

Indeed, the impression is that many of the issues are probably open 
because it's unclear whether they should be addressed with some 
implementation or spec effort or whether they should be closed. Triaging 
is certainly a harder job than it appears at first sight ;-)

It would be useful to have a kind of "suspended" or "limbo" resolution 
state on the JBS for issues like this one, so people searching for more 
compelling open ones would not encounter them.

Personally, I would close this issue without a "fix"; or "suspend" it.


>> Greetings
>> Raffaello
>> On 2021-04-16 20:36, Roger Riggs wrote:
>>> Hi,
>>> Is there any way to quantify the savings?
>>> And what technique can be applied to limit the size of the cache.
>>> The size of the small integer cache is somewhat arbitrary.
>>> Regards, Roger
>>> On 4/16/21 12:48 PM, Raffaello Giulietti wrote:
>>>> Hello,
>>>> does the enhancement proposed in [1] make sense, both today and when 
>>>> wrappers will be migrated to primitive classes?
>>>> If so, it should be rather simple to add it and I could prepare a PR.
>>>> If not, the issue might perhaps be closed.
>>>> Greetings
>>>> Raffaello
>>>> ----
>>>> [1] https://bugs.openjdk.java.net/browse/JDK-8252827

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