Hi Tom,
to quote a 2018 FAT16 speed test example by Jack, copying a mix of files and directories of different sizes disk to disk: Plain FreeDOS 65s With LBACACHE 61s adds a small cache With UIDE 51s adds UDMA and larger cache With UHDD 47s all the above plus read-ahead With XHDD 43s all the above plus I/O transfer overlap Plain MS DOS 6.22 39s With UIDE 30s adds UDMA and large cache With UHDD 27.5s all the above plus read-ahead With XHDD 26.5s all the above plus overlap By now, the drivers have evolved further, but you can see a clear speed difference both with and without them. Interestingly, even FreeDOS XCOPY takes 10 % longer than MS XCOPY (both on MS DOS), probably because we use unaligned copy_file() buffers and call getdfree() too often. Could work with incremental estimates and only call getdfree() when in doubt. Also: chmod r/w? Loading NANSI at least improves screen I/O speed ;-) In a more recent 635 MB CF to CF copy test by Jack, FreeDOS XCOPY with MS DOS kernel and UHDD took 26 seconds, versus 44 seconds in FreeDOS. While CF is probably a low IOPS medium, there is some room for improvement for FreeDOS, even with harddisks or SSD. Regards, Eric _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
