[Python-Dev] Christmas Wishlist
jepler at unpythonic.net
Sun Dec 14 22:03:47 EST 2003
On Sun, Dec 14, 2003 at 04:31:09PM -0500, Raymond Hettinger wrote:
> I. eval() to accept custom mapping arguments for globals and locals.
> This makes it possible to write a smart __getitem__ method for
> applications like spreadsheets or case-insensitive evaluation.
[and the rest of that thread]
A 3% slowdown in the common case was considered too big to allow a
feature like this to be included. The slowdown might be smaller if
the builtin module wasn't allowed to be anything but a dict instance, or
might disappear if there were two versions of ceval.c were included, and
one used PyObject_ APIs and the other used PyDict_ APIs (as long as only
one was fighting for space in the cpu cache, main memory, etc)
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