// Copyright 2016 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// +build !js
// +build !windows

package clock

import (
	"time"
)

var initTime = time.Now()

func now() int64 {
	// time.Since() returns monotonic timer difference (#875):
	// https://golang.org/pkg/time/#hdr-Monotonic_Clocks
	return int64(time.Since(initTime))
}

// Copyright 2016 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// +build !js
// +build !windows

package clock

import (
	"time"
)

func now() int64 {
	// time.Now() is monotonic:
	// https://golang.org/pkg/time/#hdr-Monotonic_Clocks
	return time.Now().UnixNano()
}

--- 
+++ 
@@ -21,8 +21,10 @@
 	"time"
 )
 
+var initTime = time.Now()
+
 func now() int64 {
-	// time.Now() is monotonic:
+	// time.Since() returns monotonic timer difference (#875):
 	// https://golang.org/pkg/time/#hdr-Monotonic_Clocks
-	return time.Now().UnixNano()
+	return int64(time.Since(initTime))
 }
clock: Use time.Since for monotonic timer

Fixes #875
