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From: <ke...@us...> - 2002-08-23 11:23:32
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>Ken has all of the utilities in perl, and I have a one as well that >prepare network bootable images. And for the longest time I could >not figure out how to perl to do a reasonably fast job of computing >the ip checksum. Reasonable as in under a minute. The attached >code accomplishes that. Your code runs in 0.1s on a 1MB vmlinuz file on my system (350MHz K6-2). Congratulations. >Does anyone have any objects to included this checksum ability >into mknbi? Go for it. >Or ideas on how to speed of the ckecksum computation, >even more? You can get 20% improvement by using pass by reference. Call compute_ip_checksum(\$string). In the routine, replace all but the first $str with $$str. |
