On Tue, Oct 25, 2011 at 08:33:28PM +0200, Michał Piotrowski wrote: > 2011/10/25 Chris Adams <cmad...@hiwaay.net>: > > Once upon a time, Michał Piotrowski <mkkp...@gmail.com> said: > >> I created feature page > >> https://fedoraproject.org/wiki/Features/F18MorePortableInterpreters > > > > I strongly object to this "feature". /bin/sh is a Unix standard back to > > IIRC around 7th Edition, and there is NO good reason to break it. The > > "#!/usr/bin/env foo" suggested replacement has always been a hack to > > work around broken systems, not something suggested for all scripts. > > What is wrong with > #!/usr/bin/env interpreter > from technical POV?
This is what's wrong: $ cat > sh.sh #!/bin/sh $ cat > env.sh #!/usr/bin/env sh $ chmod +x sh.sh env.sh $ time for i in $(seq 1000); do ./sh.sh; done real 0m2.737s user 0m0.750s sys 0m1.519s $ time for i in $(seq 1000); do ./env.sh; done real 0m3.677s user 0m1.013s sys 0m2.296s Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
