diff --git a/src/performance-now.coffee b/src/performance-now.coffee
index e752fc5..b01d8d9 100644
--- a/src/performance-now.coffee
+++ b/src/performance-now.coffee
@@ -1,15 +1,19 @@
-if performance? and performance.now
-  module.exports = -> performance.now()
-else if process? and process.hrtime
-  module.exports = -> (getNanoSeconds() - loadTime) / 1e6
-  hrtime = process.hrtime
-  getNanoSeconds = ->
-    hr = hrtime()
-    hr[0] * 1e9 + hr[1]
-  loadTime = getNanoSeconds()
-else if Date.now
-  module.exports = -> Date.now() - loadTime
-  loadTime = Date.now()
-else
-  module.exports = -> new Date().getTime() - loadTime
-  loadTime = new Date().getTime()
+module.exports = (
+	if performance?.now?
+		-> performance.now()
+
+	else if process?.hrtime?
+		getNanoSeconds = ->
+			hr = process.hrtime()
+			hr[0] * 1e9 + hr[1]
+		loadTime = getNanoSeconds()
+		-> (getNanoSeconds() - loadTime) / 1e6
+
+	else if Date.now?
+		loadTime = Date.now()
+		-> Date.now() - loadTime
+
+	else
+		loadTime = new Date().getTime()
+		-> new Date().getTime() - loadTime
+)