code review 5334051: runtime: add timer support, use for package time

src/pkg/time/sys.go

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 package time
 
 // Seconds reports the number of seconds since the Unix epoch,
 // January 1, 1970 00:00:00 UTC.
 func Seconds() int64 {
         return Nanoseconds() / 1e9
 }
 
 // Nanoseconds is implemented by package runtime.
 
 // Nanoseconds reports the number of nanoseconds since the Unix epoch,
 // January 1, 1970 00:00:00 UTC.
 func Nanoseconds() int64
 
 // Sleep pauses the current goroutine for at least ns nanoseconds.
-// Higher resolution sleeping may be provided by syscall.Nanosleep
-// on some operating systems.
 func Sleep(ns int64)