Krazy: prefix vs. postfix ++ and -- operators

[Andreas Pakulat]

On 11.01.11 16:16:23, Christoph Feck wrote:
> Krazy says:
> 
> "You should use ++ and -- as prefix whenever possible as these are more 
> efficient than postfix operators. Prefix increments first and then uses the 
> variable, postfix uses the actual; the variable is incremented as well. 
> Because of this, the prefix operators are inherently more efficient."
> 
> Considering that today's CPUs have multiple pipelines, using a value directly 
> seems faster to me than waiting for it to be incremented or decremented.
> 
> Is this krazy warning still correct?

I can't answer that question, but I think there's at least one other reason
to prefer prefix over postfix. That is that prefix has no side-effects or
'surprises' when beginners are looking at the code. So the code actually is
easier to read and understand. So personally I think the krazy-check is
just fine, only the 'why' could need an additional paragraph.

Andreas

-- 
Your supervisor is thinking about you.