RFR: 8267468: Rename refill waster counters in ThreadLocalAllocBuffer

[Albert Mingkun Yang]

On Fri, 21 May 2021 14:15:11 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Followup of https://bugs.openjdk.java.net/browse/JDK-8234532 (https://github.com/openjdk/jdk/pull/3756), dropping the "slow" segment in various counter names.

Thanks for the review.

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PR: https://git.openjdk.java.net/jdk/pull/4146