go/src/testing/testing_other.go

// isWindowsRetryable reports whether err is a Windows error code
// that may be fixed by retrying a failed filesystem operation.
func isWindowsRetryable(err error) bool { … }

type highPrecisionTime …

// highPrecisionTimeNow returns high precision time for benchmarking.
func highPrecisionTimeNow() highPrecisionTime { … }

// highPrecisionTimeSince returns duration since b.
func highPrecisionTimeSince(b highPrecisionTime) time.Duration { … }