Hi all, I noticed that doing simple loops in Bash takes unexpectedly long under Cygwin on a Windows XP 32 bit machine (CYGWIN_NT-5.1 <machine> 2.2.1(0.289/5/3) 2015-08-20 11:40 i686 Cygwin)
I already followed the FAQ advice in trying to determine general causes, and made a 'shadow' copy of /etc/passwd as described. My PATH does not contain references to network shares. Still quite normal commands take a long time e.g. time cat some-file | while read i;do echo $i;/bin/true;done real 1m44.953s user 0m9.599s sys 1m36.865s for a file of 167 lines. Process Explorer showed a CPU load of 20% on bash.exe, which was almost completely Kernel time. Is such high Kernel load normal? I know it's a bit like comparing apples to oranges, but I run the SAME command from the same disk, from within a Debian 7 486 Linux on VirtualBox (!) on the same machine, it gave real 0m3.871s user 0m0.160s sys 0m3.292s So even running in emulator, real/user/sys time are about 30/60/30 times faster. That's quite shocking. Is this performance to be expected? That would make it an obvious choice to switch to VirtualBox on this machine. Thanks, Paul -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
