Decompression speed regression in zstd 1.5.6 (win)

[oleg-st]

Comparison between zstd-v1.5.6-win64.zip and zstd-v1.5.5-win64.zip:

C:\Downloads\zstd-v1.5.6-win64>zstd.exe -b5 C:\.data\dickens 5#dickens : 10192446 -> 3529639 (x2.888), 145.2 MB/s, 1608.3 MB/s C:\Downloads\zstd-v1.5.5-win64>zstd.exe -b5 C:\.data\dickens 5#dickens : 10192446 -> 3529639 (x2.888), 146.3 MB/s, 1662.8 MB/s

Desktop (please complete the following information):

• OS: Windows
• Version 1.5.6
• CPU: 12th Gen Intel Core i7-12700, 1 CPU, 20 logical and 12 physical cores