Re: NSInvocation question
Re: NSInvocation question
- Subject: Re: NSInvocation question
- From: Chris Suter <email@hidden>
- Date: Fri, 22 Feb 2008 15:18:57 +1100
On 22/02/2008, at 3:00 PM, Hank Heijink wrote:
I made NSInvocations because timing is critical and I didn't want to
spend the time constructing the call when it needs to be invoked. I
haven't profiled the difference yet though, so maybe the tradeof
isn't bad. I'll give it a whirl.
I'm not sure what exactly you're trying to do, but NSInvocation isn't
that fast a way of making a call. It's certainly going to somewhat
slower than a compiler generated call and it's not NSInvocation's
intended use.
If you want fast calls, you should use -[NSObject methodSelector:],
cache the result and then call it directly with whatever arguments you
want. Make sure you read the documentation to see an example as it
usually requires a cast.
Having said that, let me say what has been said many times before,
unless you know it's going to be a performance bottleneck, you should
be writing your code so that it's as readable/maintainable as possible
and then optimise for performance if necessary.
- Chris
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