Allowing measurement of multiple time slots

README.md

@@ -160,9 +160,13 @@ myTimer.getDuration() // 18000
 
 #### `.measureStart(label)`
 
-Start a high-performance measurement with an associated label, you need to use
+Start or continue a high-performance measurement with the associated label, you need to use
 the same label to stop measurement, so make sure you've saved it
 
+#### `.measurePause(label)`
+
+Pause the measurement with the associated label
+
 #### `.measureStop(label)`
 
 Stop the measument with the associated label, returns the number of elapsed ms
@@ -171,12 +175,23 @@ Example:
 
 ```javascript
 
-myTimer.measureStart('label1');
+var label = 'label1';
+
+myTimer.measureStart(label);
 var a = [];
 for (var i = 10000000; i >= 0; i--) {
     a.push(i * Math.random());
 };
-myTimer.measureStop('label1'); // 276 i.e.
+myTimer.measurePause(label);
+
+// do something else
+
+myTimer.measureStart(label);
+for (var i = 0, sum = 0; i < a.length; i++) {
+    sum += a[i];
+};
+var time_elapsed = myTimer.measureStop(label);
+
 ```
 
 > Note!

src/timer.js

@@ -105,12 +105,42 @@
   }
 
   Timer.prototype.measureStart = function (label) {
-    this._.measures[label || ''] = +new Date
+    var measure
+
+    if (!this._.measures[label || '']) {
+      measure = this._.measures[label || ''] = {
+        value: 0,
+      }
+    }
+    else measure = this._.measures[label || '']
+
+    measure.timeStamp = +new Date()
+    measure.paused = false
+
     return this
   }
 
+  Timer.prototype.measurePause = function (label) {
+    var measure = this._.measures[label || '']
+    if (measure && !measure.paused) {
+      measure.value += +new Date() - measure.timeStamp
+      measure.paused = true
+    }
+    return measure.value
+  }
+
+  Timer.prototype.measureLap = function (label) {
+    return +new Date() - this._.measures[label || ''].timeStamp
+  }
+
   Timer.prototype.measureStop = function (label) {
-    return +new Date - this._.measures[label || '']
+    value = this._.measures[label || ''].value
+    delete this._.measures[label || '']
+    return value
+  }
+
+  Timer.prototype.getTime = function (label) {
+    return this._.measures[label || ''].value
   }
 
   function end () {