use std::time::Instant;

fn main() {
    let mut result: f64 = 100.0;
    let started_at = Instant::now();

    for _ in 0..1000_000_000 {
        result /= 1.0000000001;
    }

    let elapsed = started_at.elapsed();

    println!("Execution time: {}ms", elapsed.as_millis());
    println!("result = {}", result)
}

hett@hett-pc:/data/projects/rust-test$ cargo build --release
    Finished release [optimized] target(s) in 0.00s
hett@hett-pc:/data/projects/rust-test$ ./target/release/rust-test 
Execution time: 5528ms
result = 90.48374105540306

let start = new Date();

let result = 100.0;
for (let i = 0; i < 1000000000; i++) {
    result /= 1.0000000001
}

let end = new Date() - start;
console.info("Execution time: %dms", end);
console.info("Result: %f", result);

hett@hett-pc:/data/projects/rust-test$ g++ -Ofast -o /tmp/cpp-test /tmp/test.cpp
hett@hett-pc:/data/projects/rust-test$ /tmp/cpp-test
Time difference = 685[ms]
Result = 90.4837

#include <iostream>
#include <chrono>

int main() {

    std::chrono::steady_clock::time_point begin = std::chrono::steady_clock::now();

    double result = 100.0;
    for (long c = 0; c < 1000000000; c++) {
        result /= 1.0000000001;
    }

    std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();

    std::cout << "Time difference = " << std::chrono::duration_cast<std::chrono::milliseconds>(end - begin).count() << "[ms]" << std::endl;
    std::cout << "Result = " << result;

    return 0;
}

        mulpd   xmm0, xmm1
        add     eax, 1
        cmp     eax, 500000000
        jne     .L2
        movdqa  xmm1, xmm0
        psrldq  xmm1, 8
        mulpd   xmm0, xmm1
        mulsd   xmm0, QWORD PTR .LC2[rip]
        ret

        mulpd   xmm0, xmm1
        add     eax, 1
        cmp     eax, 500000000
        jne     .L2
        movdqa  xmm1, xmm0
        psrldq  xmm1, 8
        mulpd   xmm0, xmm1
        mulsd   xmm0, QWORD PTR .LC2[rip]
        ret