bench.sh

#!/bin/bash
echo '
#![feature(core)]
use std::num::Float;
fn is_prime(i: i32) -> bool {
    for j in 2..(i as f32).sqrt() as i32 + 1 {
        unsafe { std::intrinsics::assume(j != 0) }
        if i % j == 0 {
            return false;
        }
    }
    return true;
}

fn main() {
    let mut primes = 0i64;
    for i in 2..10000000 {
        if is_prime(i) {
            primes += 1;
        }
    }
    println!("{}", primes);
}' > primes.rs

echo '
#include <stdio.h>
#include <math.h>
#include <stdbool.h>

bool is_prime(int i) {
    int upper = ((int) sqrtf((int) i)) + 1;
    int j;
    for (j = 2; j < upper; ++j) {
        if (i % j == 0) {
            return false;
        }
    }
    return true;
}

int main() {
    int i;
    long primes = 0;
    for (i = 2; i < 10000000; ++i) {
        if (is_prime(i)) {
            primes++;
        }
    }
    printf("%d\n", primes);
    return 0;
}' > primes.c

rustc -C opt-level=3 -C lto --cfg ndebug -C no-stack-check -C no-redzone -o rustc_primes primes.rs
objcopy -S rustc_primes rustc_primes_strip

gcc -lm -O3 -flto -Bstatic -o gcc_primes primes.c
objcopy -S gcc_primes gcc_primes_strip

clang -lm -O3 -Bstatic -o clang_primes primes.c
objcopy -S clang_primes clang_primes_strip

echo "Rust: "
/usr/bin/time -v ./rustc_primes_strip
perf record -o rustc.dat ./rustc_primes

echo "Gcc: "
/usr/bin/time -v ./gcc_primes_strip
perf record -o gcc.dat ./gcc_primes

echo "Clang: "
/usr/bin/time -v ./clang_primes_strip
perf record -o clang.dat ./clang_primes