Re: pglz performance

> 15 мая 2019 г., в 15:06, Andrey Borodin <x4mmm@yandex-team.ru> написал(а):
>
> Owners of AMD and ARM devices are welcome.

Yandex hardware RND guys gave me ARM server and Power9 server. They are looking for AMD and some new Intel boxes.

Meanwhile I made some enhancements to test suit:
1. I've added Shakespeare payload: concatenation of works of this prominent poet.
2. For each payload compute "sliced time" - time to decompress payload if it was sliced by 2Kb pieces or 8Kb pieces.
3. For each decompressor we compute "score": (sum of time to decompress each payload, each payload sliced by 2Kb and
8Kb)* 5 times 

I've attached full test logs, meanwhile here's results for different platforms.

Intel Server
NOTICE:  00000: Decompressor pglz_decompress_hacked result 10.346763
NOTICE:  00000: Decompressor pglz_decompress_hacked8 result 11.192078
NOTICE:  00000: Decompressor pglz_decompress_hacked16 result 11.957727
NOTICE:  00000: Decompressor pglz_decompress_vanilla result 14.262256

ARM Server
NOTICE:  Decompressor pglz_decompress_hacked result 12.966668
NOTICE:  Decompressor pglz_decompress_hacked8 result 13.004935
NOTICE:  Decompressor pglz_decompress_hacked16 result 13.043015
NOTICE:  Decompressor pglz_decompress_vanilla result 18.239242

Power9 Server
NOTICE:  Decompressor pglz_decompress_hacked result 10.992974
NOTICE:  Decompressor pglz_decompress_hacked8 result 11.747443
NOTICE:  Decompressor pglz_decompress_hacked16 result 11.026342
NOTICE:  Decompressor pglz_decompress_vanilla result 16.375315

Intel laptop
NOTICE:  Decompressor pglz_decompress_hacked result 9.445808
NOTICE:  Decompressor pglz_decompress_hacked8 result 9.105360
NOTICE:  Decompressor pglz_decompress_hacked16 result 9.621833
NOTICE:  Decompressor pglz_decompress_vanilla result 10.661968

From these results pglz_decompress_hacked looks best.

Best regards, Andrey Borodin.