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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