RFR: 8261254: Initialize charset mapping data lazily

Mon Feb 8 11:44:47 UTC 2021

On Sun, 7 Feb 2021 19:08:18 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> This patch refactor JDK internal charsets to initialize charset mapping data lazily when needed via holder classes. This means both a startup improvement in some cases, and possible throughput improvements for all DoubleByte-based Charsets.
> 
> Testing: tier1-3

src/jdk.charsets/share/classes/sun/nio/cs/ext/AbstractCharsetProvider.java line 75:

> 73: 
> 74:     protected AbstractCharsetProvider(String pkgPrefixName) {
> 75:         packagePrefix = pkgPrefixName.concat(".");

Hm, I wonder why not just `pkgPrefixName + '.'` here and below?

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PR: https://git.openjdk.java.net/jdk/pull/2449