Array iteration speed testing

gistfile1.matlab

// clang -framework Foundation -fobjc-arc -O3 test.m

#import <Cocoa/Cocoa.h>


static void Time(dispatch_block_t block)
{
    NSProcessInfo *pi = [NSProcessInfo processInfo];
    NSTimeInterval start = [pi systemUptime];
    int iterations = 100;
    for(int i = 0; i < iterations; i++)
        block();
    NSTimeInterval end = [pi systemUptime];
    
    NSLog(@"Took %f seconds", (end - start) / iterations);
}

int main(int argc, char **argv)
{
    for(int i = 1; i <= 1000000; i *= 10)
    {
        NSMutableArray *array = [NSMutableArray array];
        for(int j = 0; j < i; j++)
            [array addObject: [[NSObject alloc] init]];
        
        NSLog(@"Testing with %d objects", i);
        Time(^{
            for(id obj in array)
                [obj self];
        });
    }
    
    return 0;
}

.matlab?