Re: NSMutableArray performance
Re: NSMutableArray performance
- Subject: Re: NSMutableArray performance
- From: Nat! <email@hidden>
- Date: Tue, 8 Oct 2002 01:40:25 +0200
Am Montag, 07.10.02 um 23:21 Uhr schrieb kubernan:
Hello,
I decided to rewrite my old C++ application in full Objective-C.
This application used extensively arrays of double values and makes
many computations.
I decided to replace all my arrays by NSMutableArray and all becomes
very slow.
The sequence execution between the C++ and Objective-C is the same
(executing the code in debug mode, step by step), so i can
think there is no dead code.
The mutable arrays can contain between 1 and 3 double value objects
only but
my programm makes lots of such thing :
double aValueToCompute = [[myArray objectAtIndex:index] doubleValue]
* [[theSecondArray objectAtIndex:index] doubleValue];
Is there somewhere a topic about NSMutableArray performances ?
Should i stay with simple C array ?
Yes and stay with doubles also. NSMutableArray and NSNumber are poison
for computation intensive tasks.
Ciao
Nat!
Jedenfalls sind zehn Fehlstarts hintereinander [E. Fuchs]
ein sehr interessanter Beweis
fuer unsere Theorie
von der natuerlichen Ueberlegenheit des Dezimalsystems
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