More memory-efficient internal representation for Strings: call for more data

[Vitaly Davidovich]

Any consideration towards removing the char[] (or byte[]) indirection
altogether? .NET for example stores the bytes inline with the instance.

Sent from my phone
On Dec 2, 2014 4:59 PM, "Aleksey Shipilev" <aleksey.shipilev at oracle.com>
wrote:

> Hi,
>
> As you may already know, we are looking into more memory efficient
> representation for Strings:
>  https://bugs.openjdk.java.net/browse/JDK-8054307
>
> As part of preliminary performance work for this JEP, we have to collect
> the empirical data on usual characteristics of Strings and char[]-s
> normal applications have, as well as figure out the early estimates for
> the improvements based on that data. What we have so far is written up
> here:
>  http://cr.openjdk.java.net/~shade/density/string-density-report.pdf
>
> We would appreciate if people who are interested in this JEP can provide
> the additional data on their applications. It is double-interesting to
> have the data for the applications that process String data outside
> Latin1 plane. Our current data says these cases are rather rare. Please
> read the current report draft, and try to process your own heap dumps
> using the instructions in the Appendix.
>
> Thanks,
> -Aleksey.
>
>