On Fri, Sep 01, 2023 at 10:42:16AM +0100, Richard W.M. Jones wrote:
> Results:
>
> Cluster Compression Compressed size Prog Decompression speed
>
> 4k zlib 3228811264 qemu 5.921 s ± 0.074 s
> 4k zstd 3258097664 qemu 5.189 s ± 0.158 s
>
> 4k zlib/zstd nbdkit failed, bug!!
Stupid bounds checking bug, fixed now [1]:
4k zlib 3228811264 nbdkit 1.390 s ± 0.094 s
4k zstd 3258097664 nbdkit 1.328 s ± 0.055 s
> 64k zlib 3164667904 qemu 3.579 s ± 0.094 s
> 64k zstd 3132686336 qemu 1.770 s ± 0.060 s
>
> 64k zlib 3164667904 nbdkit 1.254 s ± 0.065 s
> 64k zstd 3132686336 nbdkit 1.315 s ± 0.037 s
>
> 512k zlib 3158744576 qemu 4.008 s ± 0.058 s
> 512k zstd 3032697344 qemu 1.503 s ± 0.072 s
>
> 512k zlib 3158744576 nbdkit 1.702 s ± 0.026 s
> 512k zstd 3032697344 nbdkit 1.593 s ± 0.039 s
>
> 2048k zlib 3197569024 qemu 4.327 s ± 0.051 s
> 2048k zstd 2995143168 qemu 1.465 s ± 0.085 s
>
> 2048k zlib 3197569024 nbdkit 3.660 s ± 0.011 s
> 2048k zstd 2995143168 nbdkit 3.368 s ± 0.057 s
[1] https://gitlab.com/nbdkit/nbdkit/-/commit/73b58dc13dd7a3bbc7e7b3b718a535ee362caa92
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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