| Date | Wed, 12 Apr 2023 23:33:15 +0200 | From | "Arnd Bergmann" <> | Subject | Re: [PATCH 0/3] ARM ZSTD boot compression |
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On Wed, Apr 12, 2023, at 23:21, Jonathan Neuschäfer wrote: > This patchset enables ZSTD kernel (de)compression on 32-bit ARM. > Unfortunately, it is much slower than I hoped (tested on ARM926EJ-S): > > - LZO: 7.2 MiB, 6 seconds > - ZSTD: 5.6 MiB, 60 seconds
That seems unexpected, as the usual numbers say it's about 25% slower than LZO. Do you have an idea why it is so much slower here? How long does it take to decompress the generated arch/arm/boot/Image file in user space on the same hardware using lzop and zstd?
Arnd
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