[foreign-memaccess+abi] RFR: Performance improvement to unchecked segment ofNativeRestricted [v2]

[Radoslaw Smogura]

On Mon, 18 Jan 2021 21:43:23 GMT, Radoslaw Smogura <github.com+7535718+rsmogura at openjdk.org> wrote:

>> Would you mind pasting the benchmark results before/after the patch, now that the benchmark has been fixed? Thanks!
>
> After patch
> Benchmark                                         Mode  Cnt  Score    Error  Units
> LoopOverNonConstant.BB_get                        avgt   30  3.915 ?  0.012  ns/op
> LoopOverNonConstant.BB_loop                       avgt   30  0.230 ?  0.001  ms/op
> LoopOverNonConstant.global_segment_get            avgt   30  3.878 ?  0.001  ns/op
> LoopOverNonConstant.global_segment_loop           avgt   30  0.400 ?  0.002  ms/op
> LoopOverNonConstant.global_segment_loop_no_align  avgt   30  0.248 ?  0.001  ms/op
> LoopOverNonConstant.segment_get                   avgt   30  5.497 ?  0.015  ns/op
> LoopOverNonConstant.segment_loop                  avgt   30  0.229 ?  0.001  ms/op
> LoopOverNonConstant.segment_loop_readonly         avgt   30  0.239 ?  0.001  ms/op
> LoopOverNonConstant.segment_loop_slice            avgt   30  0.241 ?  0.001  ms/op
> LoopOverNonConstant.segment_loop_static           avgt   30  0.229 ?  0.001  ms/op
> LoopOverNonConstant.unsafe_get                    avgt   30  3.434 ?  0.006  ns/op
> LoopOverNonConstant.unsafe_loop                   avgt   30  0.229 ?  0.001  ms/op
> before patch
> Benchmark                                         Mode  Cnt  Score    Error  Units
> LoopOverNonConstant.BB_get                        avgt   30  3.906 ?  0.012  ns/op
> LoopOverNonConstant.BB_loop                       avgt   30  0.231 ?  0.001  ms/op
> LoopOverNonConstant.global_segment_get            avgt   30  4.125 ?  0.012  ns/op
> LoopOverNonConstant.global_segment_loop           avgt   30  0.596 ?  0.004  ms/op
> LoopOverNonConstant.global_segment_loop_no_align  avgt   30  0.489 ?  0.002  ms/op
> LoopOverNonConstant.segment_get                   avgt   30  5.507 ?  0.017  ns/op
> LoopOverNonConstant.segment_loop                  avgt   30  0.231 ?  0.001  ms/op
> LoopOverNonConstant.segment_loop_readonly         avgt   30  0.238 ?  0.001  ms/op
> LoopOverNonConstant.segment_loop_slice            avgt   30  0.242 ?  0.001  ms/op
> LoopOverNonConstant.segment_loop_static           avgt   30  0.230 ?  0.001  ms/op
> LoopOverNonConstant.unsafe_get                    avgt   30  3.442 ?  0.008  ns/op
> LoopOverNonConstant.unsafe_loop                   avgt   30  0.230 ?  0.001  ms/op

Hi Maurizio,

I added benchmarks, in previous comment. If you would like more, please let me know!

Have a great day,
Rado

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PR: https://git.openjdk.java.net/panama-foreign/pull/437