diff --git a/React/Base/RCTJavaScriptLoader.m b/React/Base/RCTJavaScriptLoader.m
index 6af63ac71..889f136a0 100755
--- a/React/Base/RCTJavaScriptLoader.m
+++ b/React/Base/RCTJavaScriptLoader.m
@@ -13,6 +13,7 @@
 #import "RCTConvert.h"
 #import "RCTSourceCode.h"
 #import "RCTUtils.h"
+#import "RCTPerformanceLogger.h"
 
 @implementation RCTJavaScriptLoader
 
@@ -39,6 +40,7 @@ RCT_NOT_IMPLEMENTED(- (instancetype)init)
       NSData *source = [NSData dataWithContentsOfFile:filePath
                                               options:NSDataReadingMappedIfSafe
                                                 error:&error];
+      RCTPerformanceLoggerSet(RCTPLBundleSize, source.length);
       onComplete(error, source);
     });
     return;
@@ -73,7 +75,6 @@ RCT_NOT_IMPLEMENTED(- (instancetype)init)
         encoding = CFStringConvertEncodingToNSStringEncoding(cfEncoding);
       }
     }
-
     // Handle HTTP errors
     if ([response isKindOfClass:[NSHTTPURLResponse class]] && ((NSHTTPURLResponse *)response).statusCode != 200) {
       NSString *rawText = [[NSString alloc] initWithData:data encoding:encoding];
@@ -103,6 +104,7 @@ RCT_NOT_IMPLEMENTED(- (instancetype)init)
       onComplete(error, nil);
       return;
     }
+    RCTPerformanceLoggerSet(RCTPLBundleSize, data.length);
     onComplete(nil, data);
   }];
 
diff --git a/React/Base/RCTPerformanceLogger.h b/React/Base/RCTPerformanceLogger.h
index d2f8d7b50..4e123bbfd 100644
--- a/React/Base/RCTPerformanceLogger.h
+++ b/React/Base/RCTPerformanceLogger.h
@@ -18,9 +18,11 @@ typedef NS_ENUM(NSUInteger, RCTPLTag) {
   RCTPLNativeModulePrepareConfig,
   RCTPLNativeModuleInjectConfig,
   RCTPLTTI,
+  RCTPLBundleSize,
   RCTPLSize
 };
 
 void RCTPerformanceLoggerStart(RCTPLTag tag);
 void RCTPerformanceLoggerEnd(RCTPLTag tag);
+void RCTPerformanceLoggerSet(RCTPLTag tag, int64_t value);
 NSArray *RCTPerformanceLoggerOutput(void);
diff --git a/React/Base/RCTPerformanceLogger.m b/React/Base/RCTPerformanceLogger.m
index 1a7a94362..67156f3de 100644
--- a/React/Base/RCTPerformanceLogger.m
+++ b/React/Base/RCTPerformanceLogger.m
@@ -30,6 +30,12 @@ void RCTPerformanceLoggerEnd(RCTPLTag tag)
   }
 }
 
+void RCTPerformanceLoggerSet(RCTPLTag tag, int64_t value)
+{
+  RCTPLData[tag][0] = 0;
+  RCTPLData[tag][1] = value;
+}
+
 NSArray *RCTPerformanceLoggerOutput(void)
 {
   return @[
@@ -45,6 +51,8 @@ NSArray *RCTPerformanceLoggerOutput(void)
     @(RCTPLData[RCTPLNativeModuleInjectConfig][1]),
     @(RCTPLData[RCTPLTTI][0]),
     @(RCTPLData[RCTPLTTI][1]),
+    @(RCTPLData[RCTPLBundleSize][0]),
+    @(RCTPLData[RCTPLBundleSize][1]),
   ];
 }
 
@@ -87,6 +95,7 @@ RCT_EXPORT_MODULE()
       @"NativeModulePrepareConfig",
       @"NativeModuleInjectConfig",
       @"TTI",
+      @"BundleSize",
     ],
   ]];
 }