1 files changed, 36 insertions, 0 deletions
diff --git a/util/fasttime.go b/util/fasttime.go
index a18924cb..f1a81333 100644
--- a/util/fasttime.go
+++ b/util/fasttime.go
@@ -1,5 +1,41 @@
 package util
 
+import (
+	"sync/atomic"
+	"time"
+)
+
 // FastTime provides current unix time using specified resolution with reduced number of syscalls.
 type FastTime struct {
+	last   int64
+	ticker *time.Ticker
+}
+
+// NewFastTime returns new time provider with given resolution.
+func NewFastTime(resolution time.Duration) *FastTime {
+	ft := &FastTime{
+		last:   time.Now().UnixNano(),
+		ticker: time.NewTicker(resolution),
+	}
+
+	go ft.run()
+
+	return ft
+}
+
+// Stop ticking.
+func (ft *FastTime) Stop() {
+	ft.ticker.Stop()
+}
+
+// UnixNano returns current timestamps. Value might be delayed after current time by specified resolution.
+func (ft *FastTime) UnixNano() int64 {
+	return atomic.LoadInt64(&ft.last)
+}
+
+// consume time values over given resolution.
+func (ft *FastTime) run() {
+	for range ft.ticker.C {
+		atomic.StoreInt64(&ft.last, time.Now().UnixNano())
+	}
 }