Hi, I've prepared a small package that updates the LZO version in the Linux kernel to LZO v2.06. Please get it from: http://www.oberhumer.com/opensource/lzo/download/Testing/linux-kernel-lzo-2.06.20120123.tar.gz As stated in the README, its main purpose is to allow easy benchmarking of the latest LZO versions - these do feature some nice speed improvements, and while I have done a lot of synthetic benchmarking I'm really very curious and appreciate feedback on "real-world" performance numbers like usage in btrfs and zram. Share and enjoy, Markus http://www.oberhumer.com/opensource/lzo/ On 2012-01-18 16:05, Markus F.X.J. Oberhumer wrote: > On 2012-01-13 01:28, Andi Kleen wrote: >> Here's a slightly updated version of the BTRFS snappy interface. >> snappy is a faster compression algorithm that provides similar >> compression as LZO, but generally better performance. > > I'd like to note that the LZO version in the current Linux kernel is > rather outdated - it seems to be based on the 2005 release. > > In fact the latest version LZO 2.06 does compress both slightly faster and > better than snappy 1.0.4 when benchmarking the Calgary and Silesia > compression corpus (tested with gcc 4.6 on Nehalem & Sandy Bridge). > > Furthermore please be aware that from a pure compression point of view > snappy et al. are very close cousins of LZO (strictly byte-aligned LZ77) > that mainly differ in implementation issues like using a table to > number of branches - and indeed similar optimizations could be applied > to any version. > > I'm not sure if there is an official kernel maintainer of LZO, but I'd > offer to assist you updating to the latest version and eliminating > any possible performance issues. -- Markus Oberhumer, <markus@xxxxxxxxxxxxx>, http://www.oberhumer.com/ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
