RFR: 8294137: Review running times of java.math tests [v2]

[Joe Darcy]

On Thu, 2 Mar 2023 22:35:52 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Break up `BigIntegerTest` and `SymmetricRangeTests` into subsets which are run quasi-randomly as a function of second within the minute at the time the test is running. `LargeValueExceptions` does not appear amenable to this treatment.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8303269: Use Random instead of Calendar to select test subset

Hmm. What do you think about an idiom where it would be easy (through a small source change at least) to run all the subtests?

So the default selection could look for, say, a bit in position N being set rather than the selector being N.

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PR: https://git.openjdk.org/jdk/pull/12819