mapleFU commented on PR #40335:
URL: https://github.com/apache/arrow/pull/40335#issuecomment-1984118180
After: (On My AMD 3800x)
```
BM_ByteStreamSplitDecode_Float_Sse2/1024 268 ns 268 ns
2597941 bytes_per_second=14.2391Gi/s
BM_ByteStreamSplitDecode_Float_Sse2/4096 1056 ns 1056 ns
659104 bytes_per_second=14.4464Gi/s
BM_ByteStreamSplitDecode_Float_Sse2/32768 8464 ns 8464 ns
82631 bytes_per_second=14.4228Gi/s
BM_ByteStreamSplitDecode_Float_Sse2/65536 17016 ns 17016 ns
41237 bytes_per_second=14.3476Gi/s
BM_ByteStreamSplitDecode_Double_Sse2/1024 863 ns 863 ns
811078 bytes_per_second=8.84518Gi/s
BM_ByteStreamSplitDecode_Double_Sse2/4096 3546 ns 3546 ns
196919 bytes_per_second=8.60728Gi/s
BM_ByteStreamSplitDecode_Double_Sse2/32768 28309 ns 28309 ns
24734 bytes_per_second=8.62408Gi/s
BM_ByteStreamSplitDecode_Double_Sse2/65536 56551 ns 56551 ns
12353 bytes_per_second=8.63435Gi/s
BM_ByteStreamSplitEncode_Float_Sse2/1024 349 ns 349 ns
2002774 bytes_per_second=10.9233Gi/s
BM_ByteStreamSplitEncode_Float_Sse2/4096 1381 ns 1381 ns
506294 bytes_per_second=11.053Gi/s
BM_ByteStreamSplitEncode_Float_Sse2/32768 11064 ns 11064 ns
63779 bytes_per_second=11.0334Gi/s
BM_ByteStreamSplitEncode_Float_Sse2/65536 26332 ns 26332 ns
26807 bytes_per_second=9.27175Gi/s
BM_ByteStreamSplitEncode_Double_Sse2/1024 963 ns 963 ns
728497 bytes_per_second=7.92249Gi/s
BM_ByteStreamSplitEncode_Double_Sse2/4096 4125 ns 4125 ns
170152 bytes_per_second=7.39747Gi/s
BM_ByteStreamSplitEncode_Double_Sse2/32768 34597 ns 34597 ns
20206 bytes_per_second=7.05663Gi/s
BM_ByteStreamSplitEncode_Double_Sse2/65536 69679 ns 69680 ns
10420 bytes_per_second=7.00753Gi/s
BM_ByteStreamSplitDecode_Float_Avx2/1024 230 ns 230 ns
3037165 bytes_per_second=16.5785Gi/s
BM_ByteStreamSplitDecode_Float_Avx2/4096 909 ns 909 ns
765138 bytes_per_second=16.7792Gi/s
BM_ByteStreamSplitDecode_Float_Avx2/32768 7275 ns 7275 ns
96407 bytes_per_second=16.7795Gi/s
BM_ByteStreamSplitDecode_Float_Avx2/65536 14672 ns 14672 ns
47858 bytes_per_second=16.6396Gi/s
BM_ByteStreamSplitDecode_Double_Avx2/1024 643 ns 643 ns
1086091 bytes_per_second=11.8583Gi/s
BM_ByteStreamSplitDecode_Double_Avx2/4096 2715 ns 2715 ns
257699 bytes_per_second=11.242Gi/s
BM_ByteStreamSplitDecode_Double_Avx2/32768 21646 ns 21646 ns
32293 bytes_per_second=11.2788Gi/s
BM_ByteStreamSplitDecode_Double_Avx2/65536 43594 ns 43594 ns
16003 bytes_per_second=11.2006Gi/s
BM_ByteStreamSplitEncode_Float_Avx2/1024 740 ns 740 ns
940892 bytes_per_second=5.15611Gi/s
BM_ByteStreamSplitEncode_Float_Avx2/4096 2891 ns 2891 ns
242620 bytes_per_second=5.27845Gi/s
BM_ByteStreamSplitEncode_Float_Avx2/32768 23174 ns 23174 ns
30344 bytes_per_second=5.26759Gi/s
BM_ByteStreamSplitEncode_Float_Avx2/65536 47080 ns 47080 ns
15025 bytes_per_second=5.1856Gi/s
BM_ByteStreamSplitEncode_Double_Avx2/1024 962 ns 962 ns
714181 bytes_per_second=7.92957Gi/s
BM_ByteStreamSplitEncode_Double_Avx2/4096 4206 ns 4206 ns
166235 bytes_per_second=7.25527Gi/s
BM_ByteStreamSplitEncode_Double_Avx2/32768 34696 ns 34696 ns
20041 bytes_per_second=7.03653Gi/s
BM_ByteStreamSplitEncode_Double_Avx2/65536 82677 ns 82677 ns
8268 bytes_per_second=5.90586Gi/s
```
Before:
```
BM_ByteStreamSplitDecode_Float_Sse2/1024 527 ns 527 ns
1918166 bytes_per_second=7.2438Gi/s
BM_ByteStreamSplitDecode_Float_Sse2/4096 1789 ns 1789 ns
532823 bytes_per_second=8.52931Gi/s
BM_ByteStreamSplitDecode_Float_Sse2/32768 11182 ns 11182 ns
77306 bytes_per_second=10.9164Gi/s
BM_ByteStreamSplitDecode_Float_Sse2/65536 30606 ns 30605 ns
20814 bytes_per_second=7.97704Gi/s
BM_ByteStreamSplitDecode_Double_Sse2/1024 1282 ns 1282 ns
730335 bytes_per_second=5.95065Gi/s
BM_ByteStreamSplitDecode_Double_Sse2/4096 5093 ns 5093 ns
137810 bytes_per_second=5.99156Gi/s
BM_ByteStreamSplitDecode_Double_Sse2/32768 42888 ns 42888 ns
13550 bytes_per_second=5.6925Gi/s
BM_ByteStreamSplitDecode_Double_Sse2/65536 93657 ns 93649 ns
8164 bytes_per_second=5.21396Gi/s
BM_ByteStreamSplitEncode_Float_Sse2/1024 655 ns 655 ns
1123042 bytes_per_second=5.82213Gi/s
BM_ByteStreamSplitEncode_Float_Sse2/4096 2577 ns 2577 ns
250103 bytes_per_second=5.92139Gi/s
BM_ByteStreamSplitEncode_Float_Sse2/32768 18899 ns 18899 ns
36646 bytes_per_second=6.45902Gi/s
BM_ByteStreamSplitEncode_Float_Sse2/65536 40659 ns 40659 ns
20018 bytes_per_second=6.00463Gi/s
BM_ByteStreamSplitEncode_Double_Sse2/1024 1081 ns 1078 ns
521342 bytes_per_second=7.07835Gi/s
BM_ByteStreamSplitEncode_Double_Sse2/4096 4089 ns 4084 ns
168537 bytes_per_second=7.47223Gi/s
BM_ByteStreamSplitEncode_Double_Sse2/32768 32269 ns 32237 ns
21543 bytes_per_second=7.57334Gi/s
BM_ByteStreamSplitEncode_Double_Sse2/65536 65524 ns 65427 ns
10961 bytes_per_second=7.46294Gi/s
```
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