On Sun, 22 Oct 2023 17:26:52 GMT, Laurent Bourgès <lbour...@openjdk.org> wrote:

>> * improved  mixed insertion sort (makes whole sorting faster)
>> * introduced Radix which sort shows several times boost of performance and 
>> has linear complexity instead of n*ln(n)
>> * improved merging sort for almost sorted data
>> * optimized parallel sorting
>> * improved step for pivot candidates and pivot partitioning
>> * extended existing tests
>> * added benchmarking JMH tests
>> * suggested better buffer allocation: if no memory, it is switched to 
>> in-place sorting with no OutOfMemoryError, threshold is 1/16th heap
>> 
>> I am going on previous PR by Vladimir Yaroslavskyi: 
>> https://github.com/openjdk/jdk/pull/3938
>
> Laurent Bourgès has updated the pull request incrementally with one 
> additional commit since the last revision:
> 
>   add @SuppressWarnings (serial)

Comparision of Stock JDK ( with AVX512sort) vs. Radix sort for All 
(https://github.com/iaroslavski/sorting/blob/master/radixsort/DualPivotQuicksort_RadixForAll.java)
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Benchmark   (us/op) | Builder | (size) | Stock JDK     (+AVX512 sort) | Radix 
for      All (+AVX512 sort) | Speedup
-- | -- | -- | -- | -- | --
ArraysSort.Int.testSort | RANDOM | 800 | 3.345 | 2.329 | 1.436
ArraysSort.Int.testSort | RANDOM | 7000 | 31.617 | 29.886 | 1.058
ArraysSort.Int.testSort | RANDOM | 50000 | 304.558 | 258.662 | 1.177
ArraysSort.Int.testSort | RANDOM | 300000 | 2097.165 | 1626.93 | 1.289
ArraysSort.Int.testSort | RANDOM | 2000000 | 15357.603 | 11158.73 | 1.376
ArraysSort.Int.testSort | REPEATED | 800 | 0.921 | 0.997 | 0.924
ArraysSort.Int.testSort | REPEATED | 7000 | 3.386 | 4.434 | 0.764
ArraysSort.Int.testSort | REPEATED | 50000 | 22.774 | 22.85 | 0.997
ArraysSort.Int.testSort | REPEATED | 300000 | 161.34 | 172.827 | 0.934
ArraysSort.Int.testSort | REPEATED | 2000000 | 1138.572 | 994.153 | 1.145
ArraysSort.Int.testSort | STAGGER | 800 | 2.13 | 2.383 | 0.894
ArraysSort.Int.testSort | STAGGER | 7000 | 17.967 | 19.506 | 0.921
ArraysSort.Int.testSort | STAGGER | 50000 | 121.2 | 145.089 | 0.835
ArraysSort.Int.testSort | STAGGER | 300000 | 728.444 | 858.927 | 0.848
ArraysSort.Int.testSort | STAGGER | 2000000 | 4943.958 | 5976.788 | 0.827
ArraysSort.Int.testSort | SHUFFLE | 800 | 2.834 | 2.348 | 1.207
ArraysSort.Int.testSort | SHUFFLE | 7000 | 30.086 | 38.303 | 0.785
ArraysSort.Int.testSort | SHUFFLE | 50000 | 268.786 | 258.078 | 1.041
ArraysSort.Int.testSort | SHUFFLE | 300000 | 1996.706 | 2439.81 | 0.818
ArraysSort.Int.testSort | SHUFFLE | 2000000 | 14108.444 | 19083.22 | 0.739
ArraysSort.Int.testSortParallel | RANDOM | 800 | 3.318 | 8.074 | 0.41
ArraysSort.Int.testSortParallel | RANDOM | 7000 | 26.533 | 44.091 | 0.60
ArraysSort.Int.testSortParallel | RANDOM | 50000 | 213.697 | 173.553 | 1.23
ArraysSort.Int.testSortParallel | RANDOM | 300000 | 682.952 | 829.98 | 0.82
ArraysSort.Int.testSortParallel | RANDOM | 2000000 | 3872.564 | 5170.138 | 0.75
ArraysSort.Int.testSortParallel | REPEATED | 800 | 0.907 | 5.83 | 0.16
ArraysSort.Int.testSortParallel | REPEATED | 7000 | 7.308 | 22.218 | 0.33
ArraysSort.Int.testSortParallel | REPEATED | 50000 | 63.627 | 48.959 | 1.30
ArraysSort.Int.testSortParallel | REPEATED | 300000 | 190.258 | 191.384 | 0.99
ArraysSort.Int.testSortParallel | REPEATED | 2000000 | 1415.189 | 1258.653 | 
1.12
ArraysSort.Int.testSortParallel | STAGGER | 800 | 2.127 | 5.819 | 0.37
ArraysSort.Int.testSortParallel | STAGGER | 7000 | 18.726 | 25.198 | 0.74
ArraysSort.Int.testSortParallel | STAGGER | 50000 | 70.084 | 71.956 | 0.97
ArraysSort.Int.testSortParallel | STAGGER | 300000 | 255.61 | 307.352 | 0.83
ArraysSort.Int.testSortParallel | STAGGER | 2000000 | 1591.563 | 1853.58 | 0.86
ArraysSort.Int.testSortParallel | SHUFFLE | 800 | 2.842 | 5.562 | 0.51
ArraysSort.Int.testSortParallel | SHUFFLE | 7000 | 24.412 | 33.364 | 0.73
ArraysSort.Int.testSortParallel | SHUFFLE | 50000 | 113.109 | 85.321 | 1.33
ArraysSort.Int.testSortParallel | SHUFFLE | 300000 | 359.728 | 397.225 | 0.91
ArraysSort.Int.testSortParallel | SHUFFLE | 2000000 | 2443.197 | 4177.416 | 0.58



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PR Comment: https://git.openjdk.org/jdk/pull/13568#issuecomment-1815392394

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