RFR: 8245309: Re-examine use of ThreadLocalCoders in sun.net.www.ParseUtil

[Daniel Fuchs]

On Tue, 15 Sep 2020 08:53:35 GMT, Julia Boes <jboes at openjdk.org> wrote:

> Replaced the use of ThreadLocalCoders with regular non-caching CharsetEncoder and added a benchmark to confirm that
> there is no performance impact.

Changes requested by dfuchs (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/170