Hi all, I noticed in Python/ceval.c that LOAD_GLOBAL uses a dictionary lookup, and was wondering if that can be optimized to a simple array lookup.
If i'm right there are 3 kinds of name lookups: locals, outer scopes(closures), and globals. (not counting attribute lookup). Locals are identified by, either the presence of assignments, or their presence in the arg list. So all name lookups can be classified into the 3 types at compile/load time. Since we know, at load time, which names are global.. Can't we simply build a global name table and replace LOAD_GLOBALs with a lookup at the corresponding index into the global name table? The module's dict object will need to be special so that whenever a name gets 'set', the global name table should get updated. Is this optimization possible or have i missed something? cheers [sreeram;]
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