diff --git a/Libraries/Inspector/PerformanceOverlay.js b/Libraries/Inspector/PerformanceOverlay.js
index c0be51242..3329dc341 100644
--- a/Libraries/Inspector/PerformanceOverlay.js
+++ b/Libraries/Inspector/PerformanceOverlay.js
@@ -24,11 +24,12 @@ var PerformanceOverlay = React.createClass({
 
     for (var key in perfLogs) {
       if (perfLogs[key].totalTime) {
+        var unit = (key === 'BundleSize') ? 'b' : 'ms';
         items.push(
           <View style={styles.row}>
             <Text style={[styles.text, styles.label]}>{key}</Text>
             <Text style={[styles.text, styles.totalTime]}>
-              {perfLogs[key].totalTime + 'ms'}
+              {perfLogs[key].totalTime + unit}
             </Text>
           </View>
         );
diff --git a/React/Profiler/RCTPerfMonitor.m b/React/Profiler/RCTPerfMonitor.m
index 93a6fd70a..caf660385 100644
--- a/React/Profiler/RCTPerfMonitor.m
+++ b/React/Profiler/RCTPerfMonitor.m
@@ -501,12 +501,13 @@ RCT_EXPORT_MODULE()
 
 - (void)loadPerformanceLoggerData
 {
-  NSMutableArray *data = [NSMutableArray new];
-  NSArray *times = RCTPerformanceLoggerOutput();
   NSUInteger i = 0;
+  NSMutableArray<NSString *> *data = [NSMutableArray new];
+  NSArray<NSNumber *> *values = RCTPerformanceLoggerOutput();
   for (NSString *label in RCTPerformanceLoggerLabels()) {
-    [data addObject:[NSString stringWithFormat:@"%@: %lldus", label,
-                     [times[i+1] longLongValue] - [times[i] longLongValue]]];
+    long long value = values[i+1].longLongValue - values[i].longLongValue;
+    NSString *unit = [label isEqualToString:@"BundleSize"] ? @"b" : @"ms";
+    [data addObject:[NSString stringWithFormat:@"%@: %lld%@", label, value, unit]];
     i += 2;
   }
   _perfLoggerMarks = [data copy];