Max 与 max

突然发现 , 在\(cpp\)中 , 计算\(10^9\) , 如果用\(std::max\)大概\(1000ms\) , , 内联函数也差不多\(1000ms\) , 而用\(define\)大概不到\(300ms\)

#include<bits/stdc++.h>
using namespace std;
#define Max(a,b) (a)<(b)?(b):(a)
int mx(int a,int b) {
    return a<b?b:a;
}
inline int read() {
    int res = 0,f= 1;
    char ch = getchar();
    while (ch >'9' || ch <'0') {
        if (ch=='-')
            f= -1;
        ch = getchar();
    }
    while (ch >='0' && ch <='9') {
        res = res * 10 + ch - '0';
        ch = getchar();
    }
    return res*f;
}
int main() {

    auto start = std::chrono::high_resolution_clock::now();
    int ans = 1;
    for (int i =1;i<=1e9;i++) {
        ans= mx(1,2);
    }
    auto stop = std::chrono::high_resolution_clock::now();
    auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(stop - start).count();
    std::cout << "Elapsed time: " << duration << " ms\n";

    return 0;
}