diff --git a/fastping.go b/fastping.go
index 96950ca..349ec99 100644
--- a/fastping.go
+++ b/fastping.go
@@ -43,6 +43,7 @@ import (
 	"log"
 	"math/rand"
 	"net"
+	"runtime"
 	"sync"
 	"syscall"
 	"time"
@@ -105,6 +106,10 @@ func ipv4Payload(b []byte) []byte {
 	return b[hdrlen:]
 }
 
+func numGoRoutines() int {
+	return runtime.GOMAXPROCS(0) * 4
+}
+
 type packet struct {
 	bytes []byte
 	addr  net.Addr