Comments on: Bizarre HFS+ Tricks in Mac OS X 10.6 Snow Leopard http://blog.fosketts.net/2009/09/11/bizarre-hfs-tricks-in-mac-os-x-10-6-snow-leopard/ Understanding the accumulation of data Fri, 19 Mar 2010 00:14:36 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: DGentry http://blog.fosketts.net/2009/09/11/bizarre-hfs-tricks-in-mac-os-x-10-6-snow-leopard/comment-page-1/#comment-13964 DGentry Tue, 13 Oct 2009 16:56:49 +0000 http://blog.fosketts.net/?p=2302#comment-13964 Several years ago while working on an embedded system which used CompactFlash, we experimented with an uncompressed ext2 filesystem versus a compressed JFFS2. JFFS2 used dramatically more CPU time, an issue on a 300 MHz MIPS processor, but its overall I/O performance was slightly better because it read so much less data from the CF card.<br><br>If the ratio of CPU power to disk speed is even wider, as in a typical x86 desktop with one disk, compression should become a more significant performance win. Several years ago while working on an embedded system which used CompactFlash, we experimented with an uncompressed ext2 filesystem versus a compressed JFFS2. JFFS2 used dramatically more CPU time, an issue on a 300 MHz MIPS processor, but its overall I/O performance was slightly better because it read so much less data from the CF card.

If the ratio of CPU power to disk speed is even wider, as in a typical x86 desktop with one disk, compression should become a more significant performance win.

]]> By: DGentry http://blog.fosketts.net/2009/09/11/bizarre-hfs-tricks-in-mac-os-x-10-6-snow-leopard/comment-page-1/#comment-13759 DGentry Tue, 13 Oct 2009 12:56:49 +0000 http://blog.fosketts.net/?p=2302#comment-13759 Several years ago while working on an embedded system which used CompactFlash, we experimented with an uncompressed ext2 filesystem versus a compressed JFFS2. JFFS2 used dramatically more CPU time, an issue on a 300 MHz MIPS processor, but its overall I/O performance was slightly better because it read so much less data from the CF card.<br><br>If the ratio of CPU power to disk speed is even wider, as in a typical x86 desktop with one disk, compression should become a more significant performance win. Several years ago while working on an embedded system which used CompactFlash, we experimented with an uncompressed ext2 filesystem versus a compressed JFFS2. JFFS2 used dramatically more CPU time, an issue on a 300 MHz MIPS processor, but its overall I/O performance was slightly better because it read so much less data from the CF card.

If the ratio of CPU power to disk speed is even wider, as in a typical x86 desktop with one disk, compression should become a more significant performance win.

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