<i18n dev> RFR: 8261254: Initialize charset mapping data lazily

[Naoto Sato]

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

Looks good to me. I initially thought of the same impression as Alan's, i.e., enumerating all charsets is not that common (in fact, same applies to Locale, and I once explored usages and it ended all up in test cases), but if real apps are using it, this is the right way to do so.

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Marked as reviewed by naoto (Reviewer).

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