upd

labs/lab2/scripts/script23.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+n=${1:-1000000}
+command -v bc >/dev/null 2>&1 || { echo "bc is required"; exit 1; }
+
+bench() {
+  printf 'scale=10\na=1.2345678901\nb=1.2345678901\nfor(i=0;i<%s;i++) x=a*b\n' "$n" | bc >/dev/null
+}
+
+start=$(date +%s.%N)
+bench
+end=$(date +%s.%N)
+
+dur=$(echo "$end - $start" | bc -l)
+flops=$(echo "$n / $dur" | bc -l)
+
+printf "iterations=%s\ntime_s=%s\nFLOPS=%s\n" "$n" "$dur" "$flops"
+