iOS 知识点

dispatch_benchmark-Monkey

##dispatch_benchmark-Monkey
GCD 之 dispatch_benchmark 测量指定代码块执行时间

#import <Foundation/Foundation.h>

// 声明GCD中dispatch_benchmark函数原型
extern uint64_t dispatch_benchmark(size_t count, void (^block)(void));

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        // insert code here...
        NSLog(@"Hello, World!");
        uint64_t n = dispatch_benchmark(100, ^{
            NSLog(@"hello");
        });
        NSLog(@"Block 耗时多少纳秒 : %llu",n);
    }
    return 0;
}