RFR: 8339635: StringConcatFactory optimization for CompactStrings off

[Chen Liang]

On Tue, 27 Aug 2024 05:08:53 GMT, Shaojin Wen <swen at openjdk.org> wrote:

> A small optimization, when CompactStrings is turned off, the coder method is not generated, which improves the startup performance

src/java.base/share/classes/java/lang/System.java line 2641:

> 2639:             }
> 2640: 
> 2641:             public byte stringInitCoder() {

Why do we expose this as a coder instead of other ways, such as a `boolean hasCompactStrings()`? Are we going to use this coder elsewhere?

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PR Review Comment: https://git.openjdk.org/jdk/pull/20722#discussion_r1746298499