[Python-Dev] Expression optimizations (original) (raw)

Cesare Di Mauro cesare.dimauro at a-tono.com
Tue Feb 10 21:36:03 CET 2009

On Mar, Feb 10, 2009 at 05:38 PM, Daniel Stutzbach wrote:

On Tue, Feb 10, 2009 at 10:24 AM, Cesare Di Mauro <cesare.dimauro at a-tono.com

wrote:

Could it be applyable to other operations as well? So, if I wrote: c = not(a < b)_ _the compiler and/or peephole optimizer can generate bytecodes_ _instructions_ _which, instead, execute the following operation:_ _c = a >= b

Those two expressions are equivalent for integers, but not necessarily equivalent for objects that define their own comparison operator.

OK, so I can make assumptions only for built-in types.

Thank you

Cesare

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