Add go sdk

performancemetrics/cpu.go

@@ -0,0 +1,26 @@
+package performancemetrics
+
+import (
+	"os"
+	"syscall"
+)
+
+func getCpuTime() (float64, error) {
+	_, err := os.FindProcess(os.Getpid())
+	if err != nil {
+		return 0, err
+	}
+
+	// Use syscall to get CPU times
+	var ru syscall.Rusage
+	err = syscall.Getrusage(syscall.RUSAGE_SELF, &ru)
+	if err != nil {
+		return 0, err
+	}
+
+	// Total CPU time in seconds
+	userSec := float64(ru.Utime.Sec) + float64(ru.Utime.Usec)/1e6
+	sysSec := float64(ru.Stime.Sec) + float64(ru.Stime.Usec)/1e6
+
+	return userSec + sysSec, nil
+}