diff --git a/src/DebugBar/DataCollector/TimeDataCollector.php b/src/DebugBar/DataCollector/TimeDataCollector.php
index 5794ccd7..16a1fac0 100644
--- a/src/DebugBar/DataCollector/TimeDataCollector.php
+++ b/src/DebugBar/DataCollector/TimeDataCollector.php
@@ -38,6 +38,11 @@ class TimeDataCollector extends DataCollector implements Renderable
      */
     protected $measures = array();
 
+    /**
+     * @var bool
+     */
+    protected $memoryMeasure = false;
+
     /**
      * @param float $requestStartTime
      */
@@ -53,6 +58,14 @@ public function __construct($requestStartTime = null)
         $this->requestStartTime = (float)$requestStartTime;
     }
 
+    /**
+     * Starts memory measuring
+     */
+    public function showMemoryUsage()
+    {
+        $this->memoryMeasure = true;
+    }
+
     /**
      * Starts a measure
      *
@@ -66,6 +79,7 @@ public function startMeasure($name, $label = null, $collector = null)
         $this->startedMeasures[$name] = array(
             'label' => $label ?: $name,
             'start' => $start,
+            'memory' => $this->memoryMeasure ? memory_get_usage(false) : null,
             'collector' => $collector
         );
     }
@@ -94,6 +108,9 @@ public function stopMeasure($name, $params = array())
         if (!$this->hasStartedMeasure($name)) {
             throw new DebugBarException("Failed stopping measure '$name' because it hasn't been started");
         }
+        if (! is_null($this->startedMeasures[$name]['memory'])) {
+            $params['memoryUsage'] = memory_get_usage(false) - $this->startedMeasures[$name]['memory'];
+        }
         $this->addMeasure(
             $this->startedMeasures[$name]['label'],
             $this->startedMeasures[$name]['start'],
@@ -115,6 +132,10 @@ public function stopMeasure($name, $params = array())
      */
     public function addMeasure($label, $start, $end, $params = array(), $collector = null)
     {
+        if (isset($params['memoryUsage'])) {
+            $memory = $params['memoryUsage'];
+            unset($params['memoryUsage']);
+        }
         $this->measures[] = array(
             'label' => $label,
             'start' => $start,
@@ -123,6 +144,8 @@ public function addMeasure($label, $start, $end, $params = array(), $collector =
             'relative_end' => $end - $this->requestEndTime,
             'duration' => $end - $start,
             'duration_str' => $this->getDataFormatter()->formatDuration($end - $start),
+            'memory' => $memory ?? 0,
+            'memory_str' => $this->getDataFormatter()->formatBytes($memory ?? 0),
             'params' => $params,
             'collector' => $collector
         );
diff --git a/src/DebugBar/Resources/widgets.js b/src/DebugBar/Resources/widgets.js
index 56187190..c30f086b 100644
--- a/src/DebugBar/Resources/widgets.js
+++ b/src/DebugBar/Resources/widgets.js
@@ -438,6 +438,19 @@ if (typeof(PhpDebugBar) == 'undefined') {
                     return (seconds).toFixed(2) +  's';
                 };
 
+                // ported from php DataFormatter
+                var formatBytes = function formatBytes(size) {
+                    if (size === 0 || size === null) {
+                        return '0B';
+                    }
+
+                    var sign = size < 0 ? '-' : '',
+                        size = Math.abs(size),
+                        base = Math.log(size) / Math.log(1024),
+                        suffixes = ['B', 'KB', 'MB', 'GB', 'TB'];
+                    return sign + (Math.round(Math.pow(1024, base - Math.floor(base)) * 100) / 100) + suffixes[Math.floor(base)];
+                }
+
                 this.$el.empty();
                 if (data.measures) {
                     var aggregate = {};
@@ -446,10 +459,11 @@ if (typeof(PhpDebugBar) == 'undefined') {
                         var measure = data.measures[i];
 
                         if(!aggregate[measure.label])
-                            aggregate[measure.label] = { count: 0, duration: 0 };
+                            aggregate[measure.label] = { count: 0, duration: 0, memory : 0 };
 
                         aggregate[measure.label]['count'] += 1;
                         aggregate[measure.label]['duration'] += measure.duration;
+                        aggregate[measure.label]['memory'] += (measure.memory || 0);
 
                         var m = $('<div />').addClass(csscls('measure')),
                             li = $('<li />'),
@@ -460,7 +474,8 @@ if (typeof(PhpDebugBar) == 'undefined') {
                             left: left + "%",
                             width: width + "%"
                         }));
-                        m.append($('<span />').addClass(csscls('label')).text(measure.label + " (" + measure.duration_str + ")"));
+                        m.append($('<span />').addClass(csscls('label'))
+                            .text(measure.label + " (" + measure.duration_str +(measure.memory ? ' - ' + measure.memory_str: '') + ")"));
 
                         if (measure.collector) {
                             $('<span />').addClass(csscls('collector')).text(measure.collector).appendTo(m);
@@ -506,7 +521,7 @@ if (typeof(PhpDebugBar) == 'undefined') {
                         aggregateTable.append('<tr><td class="' + csscls('name') + '">' + aggregate.data.count + ' x ' + aggregate.label + ' (' + width + '%)</td><td class="' + csscls('value') + '">' +
                             '<div class="' + csscls('measure') +'">' +
                                 '<span class="' + csscls('value') + '" style="width:' + width + '%"></span>' +
-                                '<span class="' + csscls('label') + '">' + formatDuration(aggregate.data.duration) + '</span>' +
+                                '<span class="' + csscls('label') + '">' + formatDuration(aggregate.data.duration) + (aggregate.data.memory ? ' - ' + formatBytes(aggregate.data.memory) : '') + '</span>' +
                             '</div></td></tr>');
                     });