From 67c26c71b6e5f60155dc01266ba068da6aab08be Mon Sep 17 00:00:00 2001
From: Asim Aslam <asim@aslam.me>
Date: Wed, 4 Mar 2020 15:37:17 +0000
Subject: [PATCH] add jitter (#1298)

---
 util/jitter/jitter.go | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 util/jitter/jitter.go

diff --git a/util/jitter/jitter.go b/util/jitter/jitter.go
new file mode 100644
index 00000000..24e0700d
--- /dev/null
+++ b/util/jitter/jitter.go
@@ -0,0 +1,17 @@
+// Package jitter provides a random jitter
+package jitter
+
+import (
+	"math/rand"
+	"time"
+)
+
+var (
+	r = rand.New(rand.NewSource(time.Now().UnixNano()))
+)
+
+// Do returns a random time to jitter with max cap specified
+func Do(d time.Duration) time.Duration {
+	v := r.Float64() * float64(d.Nanoseconds())
+	return time.Duration(v)
+}