RFR: 8265028: JDWP debug agent thread lookup can be made faster

[Serguei Spitsyn]

On Mon, 12 Apr 2021 20:29:56 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

> Improved thread lookup speeds in the debug agent, especially when there is a large number of threads. See CR for details.

Looks good.

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Marked as reviewed by sspitsyn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/3444