Chris Tillman wrote: > Pkg download approx. md5sum wc -c > ------ --------------- ------ ----- > libc6 55 sec 15 sec 1 min 19 sec > dpkg 18 sec 5 sec 25 sec > > I have no idea why the sums and wc take so long on that machine in the > installer. Must be some effect of the reduced libraries. If I do the > same operations in a booted Linux system on that machine, they take > around a second or so. I also checked it in the installer system on my > iMac, and it's pretty much instant there too.
Good job of gathering data. Busybox wc does indeed have some severe efficiency problems, it seems: joey@silk:~>time busybox wc -c bigfile 10240000 bigfile 1.63user 0.04system 0:01.67elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (113major+15minor)pagefaults 0swaps joey@silk:~>time wc -c bigfile 10240000 bigfile 0.00user 0.00system 0:00.00elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (113major+13minor)pagefaults 0swaps This is a p2 400, I'm sure it's much worse on a pentium or 486. According to strace, busybox wc -c reads in the whole file in 4096 byte chunks. On the other hand, gnu wc -c just stats the thing, which is obviously tons more efficient. -- see shy jo -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
