[Python-ideas] re.compile_lazy - on first use compiled regexes
Stefan Behnel stefan_ml at behnel.de Sun Mar 24 08:48:26 CET
2013  Eli Bendersky, 24.03.2013 04:39: > How about examining
what the size of that re cache is, and how much memory > it
typically occupies. Perhaps this cache can be changed to fit
more > regexes?  The problem is that there is no "default
workload" to measure against. If a stupid dispatch engine
automatically generates tons of regexes to compare, say, URLs
against, you can make the cache as large as you want and it
won't help. I doubt that that's a serious use case, though -
combining all of them into a single regex (and then actually
pre-compiling that statically instead of relying on the cache)
would be way smarter.  Apart from extreme cases like the above,
a cache size of 512 sounds *plenty* large, more like a "we don't
know, so make it large" kind of choice. Maybe measuring could
actually help in making it *smaller*, but I guess that's simply
not worth it. If the space is not used,