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Re: loop efficiency & messages
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Re: loop efficiency & messages


  • Subject: Re: loop efficiency & messages
  • From: Todd Blanchard <email@hidden>
  • Date: Wed, 23 Mar 2005 03:55:37 -0800

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Not exactly on topic but getCount is a lousy name for a method in objective C.

accessors are just the attrribute names ie count
mutators are setCount:

unless you want your code to look like it was done by a piker don't cha know.

On Mar 22, 2005, at 11:57 AM, Mark Dawson wrote:

if I have a getter: -getCount { return mCount; }

How much of a difference are there between the following two loops?

int count = [self getCount];
for (i = 0; i < count; i++)
…

for (i = 0; i < [self getCount]; i++)

Does compiler optimize this similar to a C++ inline so that count is just stored in a register, or does a message sequence happen each time? If messages happen each time, is it a better habit to do the first for loop (where the compiler should just keep count in a register)? I realize that it may not make much difference with most loops, but if there's a "better" way, I'd like to get into the habit of typing the "better" code…

Thanks,

mark
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References: 
 >loop efficiency & messages (From: Mark Dawson <email@hidden>)

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