On Wed, 30 Apr 2025 15:33:52 GMT, Per Minborg <pminb...@openjdk.org> wrote:
>> This PR is based on the work of @mernst-github and aims to implement an >> _internal_ thread-local 'stack' allocator, which works like a dynamically >> sized arena, but with reset functionality to reset the allocated size back >> to a certain level. The underlying memory could stay around between calls, >> which could improve performance. >> >> Re-allocated segments are not zeroed between allocations. > > Per Minborg has updated the pull request incrementally with one additional > commit since the last revision: > > Improve on comments Updated benchmarks: Benchmark (ELEM_SIZE) Mode Cnt Score Error Units BufferStackBench.OfVirtual.buffer 8 avgt 15 12.653 ± 0.189 ns/op BufferStackBench.OfVirtual.buffer 16 avgt 15 12.635 ± 0.228 ns/op BufferStackBench.OfVirtual.buffer 32 avgt 15 12.562 ± 0.062 ns/op BufferStackBench.OfVirtual.confined 8 avgt 15 22.649 ± 0.262 ns/op BufferStackBench.OfVirtual.confined 16 avgt 15 23.507 ± 0.146 ns/op BufferStackBench.OfVirtual.confined 32 avgt 15 25.426 ± 0.512 ns/op BufferStackBench.buffer 8 avgt 15 4.693 ± 0.037 ns/op BufferStackBench.buffer 16 avgt 15 4.715 ± 0.032 ns/op BufferStackBench.buffer 32 avgt 15 4.670 ± 0.038 ns/op BufferStackBench.confined 8 avgt 15 22.548 ± 0.022 ns/op BufferStackBench.confined 16 avgt 15 23.494 ± 0.092 ns/op BufferStackBench.confined 32 avgt 15 25.285 ± 0.076 ns/op and Benchmark Mode Cnt Score Error Units CallOverheadByValue.OfVirtual.byPtr avgt 15 4.095 ± 0.035 ns/op CallOverheadByValue.OfVirtual.byValue avgt 15 16.666 ± 0.208 ns/op CallOverheadByValue.byPtr avgt 15 4.132 ± 0.146 ns/op CallOverheadByValue.byValue avgt 15 11.835 ± 0.139 ns/op Pases `tier1` testing on various platforms and JVM configurations ------------- PR Comment: https://git.openjdk.org/jdk/pull/24829#issuecomment-2842462592
