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>Yes there is lookup, always lookup. Dynamic language, something in loop could change what lstr is. And why is that presented as something inevitable? The int
by dmorgan 14y ago
>Yes there is lookup, always lookup. Dynamic language, something in loop could change what lstr is.
And why is that presented as something inevitable?
The interpreter/compiler could analyze that part and see that the function/name is not changed during the loop, and cache for that.
I'd guess that PyPy tries to do it that way, anyway...
- lvh 14y agoYes, that's one of the many optimizations PyPy does, however it's only a very limited one. PyPy goes much, much deeper than this, with tools like function inlining and escape analysis.