On Sun, 18 May 2025 12:48:07 GMT, Shaojin Wen <[email protected]> wrote:
> Through JVM Option +PrintInlining, we found that String has a constructor
> codeSize of 852, which is too large. This caused failed to inline.
>
> The following is the output information of PrintInlining:
>
> @ 9 java.lang.String::<init> (12 bytes) inline (hot)
> !m @ 1 java.nio.charset.Charset::defaultCharset (52 bytes)
> inline (hot)
> ! @ 8 java.lang.String::<init> (852 bytes) failed to
> inline: hot method too big
>
>
> In Java code, the big method that cannot be inlined is the following
> constructor
>
>
> String(Charset charset, byte[] bytes, int offset, int length) {}
>
> The above String constructor is too large; break it down into smaller methods
> with a codeSize under 325 to allow them to be inlined by the C2.
This pull request has now been integrated.
Changeset: 839cede1
Author: Shaojin Wen <[email protected]>
URL:
https://git.openjdk.org/jdk/commit/839cede1a46b05d27abeaffbbd82c241910035cd
Stats: 181 lines in 1 file changed: 62 ins; 79 del; 40 mod
8357289: Break down the String constructor into smaller methods
Reviewed-by: liach, rriggs
-------------
PR: https://git.openjdk.org/jdk/pull/25290
