Re: Loading from squashfs with zstd compression slower than ext4

Hi Jonathan,

On Wed, 31 May 2023 at 06:52, Jonathan Liu net147@gmail.com wrote:

Hi All,

I noticed that loading from squashfs with zstd compression is significantly slower than ext4 on RK3399 using U-Boot 2022.01. The filesystem is located on eMMC.

I have CONFIG_BLOCK_CACHE=y in .config and am using the generic load command.

ext4: 15682578 bytes read in 366 ms (40.9 MiB/s)

SquashFS with zstd compression: 15685001 bytes read in 2339 ms (6.4 MiB/s)

Any suggestions on how to speed up loading from SquashFS with zstd compression?

Could it just be that zstd is slow? Have you tried lz4?

Regards, Simon