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.
