FLOPS

flops.sh

#!/usr/bin/env bash

FLOP=4000000;

gcc -o main main.c;

TIMEFORMAT=%R
ELAPSED=`( time ./main ) 2>&1 > /dev/null`

FLOPS=$(echo "$FLOP/$ELAPSED" | bc)

echo "elapsed: $ELAPSED seconds"
echo "flops: $FLOPS"

main.c

#define NUMBERS 1000000

int main(void) {
    float values[NUMBERS];
    float res;

    int i, j=3, k=42;

    for(i=0; i < NUMBERS; i++) {
        values[i] = (i + k) * j;
        res = values[i] / (float)k;
    }
}