I'm trying to get a handle on a real world problem related to raising an exception. This is in the reportlab SimpleDoctemplate class.
The following code takes a very long time (>60 seconds) in Python 2.2, 2.3, 2.4, but not in 2.1 (at least on windows).
raise LayoutError("Flowable %s too large on page %d" % (f.identity(30), self.page))
However, the supposedly functionally identical code
ident = f.identity(30) raise LayoutError("Flowable %s too large on page %d" % (ident, self.page))
does not take a long time (<< 1 second). The exception LayoutError is trivial
class LayoutError(Exception):
pass
.....
It seems this problem is caused by the above code being used in a cgitb.enabled() environment (in a cgi script). That also explains why it wasn't happening in 2.1 as we don't use cgitb in that case.
Moving f out of the cgitb evaluated variables lines allows things to work quickly.
Yet another cgitb problem. -- Robin Becker
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