Frequent allocations / promotions of StringCoding$String{Encoder,Decoder} objects

Aleksey Shipilev aleksey.shipilev at
Thu Feb 25 21:16:27 UTC 2016

On 02/25/2016 11:48 PM, Tony Printezis wrote:
> Has anyone identified this issue before? 

Hm, there is a blast from the past:

In comments there, Mark suggests a patch that apparently handles
multiple coders. I wonder where did that go. Also, Martin Buchholz is
still an assignee there :)

> We believe that caching a small number of coders per thread (instead
> of just one) could avoid this unnecessary churn. We’ll be happy to
> contribute such a fix if there’s interest in getting it accepted.

Yes, this seems important.


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