RFR: 8315098: Improve URLEncodeDecode microbenchmark [v3]

[Claes Redestad]

On Wed, 30 Aug 2023 15:33:01 GMT, Francesco Nigro <duke at openjdk.org> wrote:

>> Claes Redestad has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Print out distribution of generated strings, improve precision at extremes (short strings, very low percentages), fix issue with decodable not getting the expected distribution
>
> test/micro/org/openjdk/bench/java/net/URLEncodeDecode.java line 86:
> 
>> 84:         tokens[n++] = '*';
>> 85: 
>> 86:         Random r = new Random(mySeed);
> 
> SplittableRandom allow to have perfectly reproducible sequences

Care to elaborate? `Random` with an explicit seed should be more than enough to have perfectly reproducible sequences for our case (`SplittableRandom` uses a different algorithm by default with a longer period, but I can't see how this'd be relevant to this case.)


 * If two instances of {@code Random} are created with the same
 * seed, and the same sequence of method calls is made for each, they
 * will generate and return identical sequences of numbers.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15448#discussion_r1310479054