-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Marc MERLIN schreef op 12-04-14 15:17: > On Fri, Apr 04, 2014 at 04:09:06PM +0100, Hugo Mills wrote: >>> - Generally speaking, does LZO compression improve or degrade >>> performance ? I'm not able to figure it out clearly. >> >> Yes, it improves or degrades performance. :) >> >> It'll depend entirely on what you're doing with it. If you're storing >> lots of zeroes (Phoronix, I'm looking at you), then you'll get huge >> speedups. If you're storing video data, you'll get a (very) slight >> performance drop as it scompresses the first few blocks of the file and >> then gives up. I suspect that in general, the performance differences >> won't be noticable unless you have highly compressible large files, but >> if you _really_ care about it, benchmark it(*). >> >> Hugo. >> >> (*) If you don't want to go through the effort of benchmarking, you >> don't care enough about it, and should just pick something at random. > > Speaking of this bit, I once tried to use zlib instead of lzo, and > somehow it felt that my laptop on SSD booted noticeably slower after > that, which felt weird since decompression speed should be about the > same. > > Has anyone else noticed anything like this?
LZO should decompress a lot faster than zlib, I know that's the case on ARM and 32bit x86. regards, Koen -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (Darwin) Comment: GPGTools - http://gpgtools.org iD8DBQFTSXQQMkyGM64RGpERAtTRAJ9WQg0xA3s3AA+jMryzn6PVWpyEegCbBZTR IzOZtgJvMbLT2fXdw0fOCxQ= =2FXK -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
