On Wed, Feb 27, 2013 at 09:51:39AM +0000, Russell King - ARM Linux wrote: > On Wed, Feb 27, 2013 at 04:36:47PM +0900, Kyungsik Lee wrote: > > Compiler: Linaro ARM gcc 4.6.2 > > 2. ARMv7, 1.7GHz based board > > Kernel: linux 3.7 > > Uncompressed Kernel Size: 14MB > > Compressed Size Decompression Speed > > LZO 6.0MB 34.1MB/s Old > > ---------------------------------------- > > 6.0MB 34.7MB/s New > > 6.0MB 52.2MB/s(UA) > > ============================================= > > LZ4 6.5MB 86.7MB/s > > UA: Unaligned memory Access support > > That is pretty conclusive - it shows an 8% increase in image size vs a > 66% increase in decompression speed. It will take a _lot_ to offset > that increase in decompression speed. > > So, what I think is that yes, we should accept LZ4 and drop LZO from > the kernel - the "fast but may not be small" compression title has > clearly been taken by LZ4.
I have read the comments regarding how many compressors the kernel should support and understand that it can not support all the compressors available. However, I don't think that LZO can be replaced by LZ4 in all the cases. The benchmark above shows only about improved decompression speed. Thanks, Kyungsik -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
