Re: 回复：Propose to remove support for CompactStrings off

[Alan Bateman]

On 06/11/2025 18:48, Stuart Marks wrote:
>
> Hi wenshao,
>
> I've written up a draft JEP for deprecating the disabling of Compact 
> Strings. There hasn't been a good term for running the system with 
> Compact Strings disabled, so I made up a term "UTF-16-only" and used 
> it here.
>
> https://openjdk.org/jeps/8371379
>
>
This is deprecating something that I assume most developers have never 
heard of. It's important that anyone reading the JEP will quickly see 
that this is not deprecating String, it's not dropping UTF-16, and it's 
not changing the String constructor that take a Charset. Instead it's 
all about JDK internal representation of String. No change needed to my 
code. I think the JEP needs a clear call-to-action:  Audit your 
application launch scripts and configuration to see if you are using 
-XX:-CompactStrings. If you are, remove it, and re-test/re-benchmark to 
see if see if there is any impact, preferably with a recent JDK release.

-Alan.