Ah I understand. In this benchmark, Zstd's decompression time is 284 MB/s, and Gzip's is 330 MB/s. This benchmark is likely dominated by file IO for the faster decompressors.

On the incompressible files, I'd expect decompression of any algorithm to approach the speed of `memcpy()`. And would generally expect zstd's decompression speed to be faster. For example, on a x86 core running at 2GHz, Zstd is decompressing a file at 660 MB/s, and on my M1 at 1276 MB/s.

You could measure locally either using a specialized tool like lzbench [0], or for zstd by just running `zstd -b22 --ultra /path/to/file`, which will print the compression ratio, compression speed, and decompression speed.

[0] https://github.com/inikep/lzbench