On Tue, Feb 26, 2002 at 04:56:10PM -0800, Paul Eggert wrote: > > From: Zack Weinberg <[EMAIL PROTECTED]> > > Date: Tue, 26 Feb 2002 08:37:08 -0800 > > > > According to David Edelsohn <[EMAIL PROTECTED]>, AIX's /bin/sh and > > /bin/ksh support $LINENO but have the same performance problem with > > here documents. That means the _test_ as implemented is not good > > enough. It may be possible to detect the problem and add a check for > > it to the probe logic > > I thought about it a bit, but I don't see how to do this portably, > using just shell commands.
In this case, we know that the problem is due to the creation of thousands of temporary files which each subshell invocation creates hard links to. If, I say if, someone can generate a small script that causes the shell to do this, then it could look into /tmp for the scratch files. > Can you assume that the people with the performance problems have > access to a better shell like Bash? If so, you can ask them to put > CONFIG_SHELL=/path/to/bash before running configure. That should > solve the problem. That is the currently recommended workaround; however, we would prefer an automatic solution. > For example, you might try using 'case' rather than 'if'. Sometimes > that avoids weird performance bugs in /bin/sh. E.g. instead of: Oh really? That might indeed be worth trying, thanks. zw
