What python can NOT do?

Mon Sep 7 22:49:28 EDT 2009

On 2009年9月08日 00:09:26 +0000, Albert van der Horst wrote:
>>Existing Python implementations don't give you direct access to
>>hardware, and bit-manipulation has a lot of overhead in Python.
>>Numerical
>> Surely you don't mean that
> 0x17 & 0xAD
> has more overhead than
> 17 + 123
> So what do you mean here?

What I mean is that bit-manipulation in low-level languages like C is 
very close to the metal, and hence very efficient. In Python, *all* 
operations (including bit-manipulation and arithmetic) has the overhead 
of the Python virtual machine. You won't notice the difference if you're 
just ANDing a handful of numbers, but if you're doing millions of them 
(say, you're doing industrial-strength encryption) you certainly will.
-- 
Steven