RFR: 8290391: Reduce runtime of java.util package microbenchmarks

[Claes Redestad]

On Fri, 15 Jul 2022 18:41:09 GMT, Eric Caspole <ecaspole at openjdk.org> wrote:

> Adds Warmup, Measurement and Fork annotations to reduce the run time from 1 day 16 hours to 8 hours for this set.

LGTM, some suggestions inline that you can choose to ignore

test/micro/org/openjdk/bench/java/util/ArraysFill.java line 48:

> 46: public class ArraysFill {
> 47: 
> 48:     @Param({"10", "16", "31", "59", "89", "126", "250", "266", "511", "1021", "2047", "2048", "4095", "8195"})

Can we prune a few of these?

test/micro/org/openjdk/bench/java/util/ArraysMismatchPartialInlining.java line 47:

> 45: public class ArraysMismatchPartialInlining {
> 46: 
> 47:     @Param({"3", "4", "5", "6", "7", "15", "31", "63", "95", "800"})

Can we prune a few of these? At least 4, 5, 6 seem like they'll not add much signal.

test/micro/org/openjdk/bench/java/util/Base64VarLenDecode.java line 87:

> 85: 
> 86:     @Benchmark
> 87:     @Warmup(iterations = 4, time = 2)

I prefer putting these at class level (even when there's only one `@Benchmark`)

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Marked as reviewed by redestad (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9523