Re: bitwise operations in obj C
Re: bitwise operations in obj C
- Subject: Re: bitwise operations in obj C
- From: John Stiles <email@hidden>
- Date: Wed, 17 Oct 2007 09:54:19 -0700
Make increment a power of two, and then you can use bit masking (via
the & operator).
FWIW I would not worry about one division unless Shark tells you that
it is a problem. It's not free, but it's not that expensive either.
On Oct 17, 2007, at 9:34 AM, Erfan Aleemullah wrote:
hello all,
I have a modulus operation in my code and it runs fine, but my
original
algorithm avoided division all together for speed reasons - I am using
modulus due to a change in requirements.
How exactly (or can I) use bit operations to achieve the same
effect and
increase my speed here ?
Code:
line_Number++;
if(line_Number % increment == 0)
// lineNumber is any
integer
value > 0, can get large w/ time - 100,000++
{ // increment is user
selectable
integer from a set of given values
....
....
}
thanks.
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