Re: [PATCH v4 2/5] lib/lz4: update LZ4 decompressor module

Hi Jianan,

On Sat, 26 Feb 2022 at 18:05, Huang Jianan jnhuang95@gmail.com wrote:

Update the LZ4 compression module based on LZ4 v1.8.3 in order to use the newest LZ4_decompress_safe_partial() which can now decode exactly the nb of bytes requested.

Signed-off-by: Huang Jianan jnhuang95@gmail.com

I noticed after this commit LZ4 decompression is slower. ulz4fn function call takes 1.209670 seconds with this commit. After reverting this commit, the ulz4fn function call takes 0.587032 seconds.

I am decompressing a LZ4 compressed kernel (compressed with lz4 v1.9.4 using -9 option for maximum compression) on RK3399.

Any ideas why it is slower with this commit and how the performance regression can be fixed?

Thanks.

Regards, Jonathan