[PATCH] erofs-utils: avoid redundant memcpy and sha256() for dedupe

[Gao Xiang]

Hi Zijie,

On 2025/8/15 16:44, wangzijie wrote:
> We have already use xxh64() for filtering first for dedupe, when we
> need to skip the same xxh64 hash, no need to do memcpy and sha256(),
> relocate the code to avoid it.
> 
> Signed-off-by: wangzijie <wangzijie1 at honor.com>

Thanks for the patch, it makes sense to me since we only keep one
record according to xxh64 (instead of sha256) for now:

Reviewed-by: Gao Xiang <hsiangkao at linux.alibaba.com>

Although I think multi-threaded deduplication is more useful, see:
https://github.com/erofs/erofs-utils/issues/25
but I'm not sure if you're interested in it... ;-)

Thanks,
Gao Xiang