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

Steve Holden steve at holdenweb.com
Tue Feb 10 18:16:23 CET 2009

Daniel Stutzbach wrote:

On Tue, Feb 10, 2009 at 10:24 AM, Cesare Di Mauro <cesare.dimauro at a-tono.com <mailto: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. That's true, but the same could be said about the existing optimizations for objects that define their own contains.

regards Steve

Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/

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