foriftest.m

/*/../bin/ls > /dev/null
 COMPILED=${0%.*}
 clang $0  -o $COMPILED -framework Foundation;
 $COMPILED; rm $COMPILED; exit;
 */

#import <Foundation/Foundation.h>

@class CNSObject;

@interface CNSObject : NSObject
@property (nonatomic, retain) NSObject *obj;
@property (nonatomic, retain) CNSObject *obj_obj;
@property (nonatomic) bool b;
@property (nonatomic) BOOL bb;
@end

@implementation CNSObject

@end


int main(int argc, char *argv[])
{
    @autoreleasepool
    {
        
        CNSObject *obj = [[CNSObject alloc] init];
        obj.obj_obj = [[CNSObject alloc] init];
        obj.obj_obj.obj_obj = [[CNSObject alloc] init];
        
        void (^simpleBlock)(void);
        
        simpleBlock = ^{
          
        };
        
        
        double t;
        
        int it_times = INT_MAX;
        
        NSLog(@"Testing \"for\" with %d iterations and different if's", it_times);
        
        t = CFAbsoluteTimeGetCurrent();
        
        for (int i = 0; i < it_times; i++) {
            if (obj) {
                
            }
        }
        NSLog(@"object is not nil %f sec", CFAbsoluteTimeGetCurrent()-t);
        t = CFAbsoluteTimeGetCurrent();
        
        
        for (int i = 0; i < it_times; i++) {
            if (obj.b) {
                
            }
        }
        NSLog(@"object check bool %f sec", CFAbsoluteTimeGetCurrent()-t);
        t = CFAbsoluteTimeGetCurrent();
        
        for (int i = 0; i < it_times; i++) {
            if (obj.bb) {
                
            }
        }
        NSLog(@"object check BOOL %f sec", CFAbsoluteTimeGetCurrent()-t);
        t = CFAbsoluteTimeGetCurrent();
        
        for (int i = 0; i < it_times; i++) {
            if (obj.obj) {
                
            }
        }
        NSLog(@"object has object %f sec", CFAbsoluteTimeGetCurrent()-t);
        t = CFAbsoluteTimeGetCurrent();

        for (int i = 0; i < it_times; i++) {
            if (obj.obj_obj) {
                
            }
        }
        NSLog(@"object has object which is not nil %f sec", CFAbsoluteTimeGetCurrent()-t);
        t = CFAbsoluteTimeGetCurrent();
        
        
        for (int i = 0; i < it_times; i++) {
            if (obj.obj_obj.obj_obj) {
                
            }
        }
        NSLog(@"object has 3 level of objects %f sec", CFAbsoluteTimeGetCurrent()-t);
        t = CFAbsoluteTimeGetCurrent();
        
        for (int i = 0; i < it_times; i++) {
            
            if ([obj isKindOfClass:[CNSObject class]]) {

            }
        }
        NSLog(@"object isKindOfClass %f sec", CFAbsoluteTimeGetCurrent()-t);
        t = CFAbsoluteTimeGetCurrent();
        
        for (int i = 0; i < it_times; i++) {

            simpleBlock();
            
        }
        NSLog(@"perform block %f sec", CFAbsoluteTimeGetCurrent()-t);
        t = CFAbsoluteTimeGetCurrent();
        
        for (int i = 0; i < it_times; i++) {
            
            if (simpleBlock) {
                simpleBlock();
            }
        }
        NSLog(@"block is available and perform then %f sec", CFAbsoluteTimeGetCurrent()-t);
        t = CFAbsoluteTimeGetCurrent();

    
    }
    return 0;
}