shift bit & performance?
dtj at uberh4x0r.org
Tue Oct 21 15:33:33 EDT 2003
On Tue, 2003-10-21 at 14:32, Eduardo Cesar Cabrera Flores wrote:
> sometime ago, somebody sent an info about performance working with "<<" &
> ">>" doing shift bits instead of using "*" or "/"
> Could anybody help me about it?
There is certainly performance to be had from using a logical shift instead of a
multiply or divide, but its of declining value. I am fairly sure that with modern
compilers you do a integer divide by a constant power of 2, that it will generate
a logical shift. That aint rocket science.
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