Refactor: Assign string label to each case in RCTPLTag enum for startup performance logging

Summary:
`_labelsForTags` is an array with string labels used only for local profiling, that we had to manually keep it in sync with `RCTPLTag`. Refactor so labels are assigned with switch instead.

Changelog: [iOS] Refactor: Assign string label to each case in RCTPLTag enum for startup performance logging

Reviewed By: fkgozali

Differential Revision: D32889043

fbshipit-source-id: 81da592a160a31b91e78289be0990cc2ff960f29

Author: p-sun

BUCK

@@ -287,9 +287,11 @@ REACT_PUBLIC_HEADERS = {
     "React/RCTModuleMethod.h": RCTBASE_PATH + "RCTModuleMethod.h",
     "React/RCTMultipartStreamReader.h": RCTBASE_PATH + "RCTMultipartStreamReader.h",
     "React/RCTNullability.h": RCTBASE_PATH + "RCTNullability.h",
+    "React/RCTPLTag.h": RCTBASE_PATH + "RCTPLTag.h",
     "React/RCTPackagerClient.h": RCTDEVSUPPORT_PATH + "RCTPackagerClient.h",
     "React/RCTPackagerConnection.h": RCTDEVSUPPORT_PATH + "RCTPackagerConnection.h",
     "React/RCTPerformanceLogger.h": RCTBASE_PATH + "RCTPerformanceLogger.h",
+    "React/RCTPerformanceLoggerLabels.h": RCTBASE_PATH + "RCTPerformanceLoggerLabels.h",
     "React/RCTPointerEvents.h": RCTVIEWS_PATH + "RCTPointerEvents.h",
     "React/RCTProfile.h": "React/Profiler/RCTProfile.h",
     "React/RCTPushNotificationManager.h": RCTLIB_PATH + "PushNotificationIOS/RCTPushNotificationManager.h",

React/Base/RCTPLTag.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+typedef NS_ENUM(NSInteger, RCTPLTag) {
+  RCTPLScriptDownload = 0,
+  RCTPLScriptExecution,
+  RCTPLRAMBundleLoad,
+  RCTPLRAMStartupCodeSize,
+  RCTPLRAMStartupNativeRequires,
+  RCTPLRAMStartupNativeRequiresCount,
+  RCTPLRAMNativeRequires,
+  RCTPLRAMNativeRequiresCount,
+  RCTPLNativeModuleInit,
+  RCTPLNativeModuleMainThread,
+  RCTPLNativeModulePrepareConfig,
+  RCTPLNativeModuleMainThreadUsesCount,
+  RCTPLNativeModuleSetup,
+  RCTPLTurboModuleSetup,
+  RCTPLJSCWrapperOpenLibrary,
+  RCTPLBridgeStartup,
+  RCTPLTTI,
+  RCTPLBundleSize,
+  RCTPLReactInstanceInit,
+  RCTPLSize // This is used to count the size
+};

React/Base/RCTPerformanceLogger.h

@@ -6,30 +6,7 @@
  */
 
 #import <Foundation/Foundation.h>
-
-// Keep this in sync with _labelsForTags
-typedef NS_ENUM(NSInteger, RCTPLTag) {
-  RCTPLScriptDownload = 0,
-  RCTPLScriptExecution,
-  RCTPLRAMBundleLoad,
-  RCTPLRAMStartupCodeSize,
-  RCTPLRAMStartupNativeRequires,
-  RCTPLRAMStartupNativeRequiresCount,
-  RCTPLRAMNativeRequires,
-  RCTPLRAMNativeRequiresCount,
-  RCTPLNativeModuleInit,
-  RCTPLNativeModuleMainThread,
-  RCTPLNativeModulePrepareConfig,
-  RCTPLNativeModuleMainThreadUsesCount,
-  RCTPLNativeModuleSetup,
-  RCTPLTurboModuleSetup,
-  RCTPLJSCWrapperOpenLibrary,
-  RCTPLBridgeStartup,
-  RCTPLTTI,
-  RCTPLBundleSize,
-  RCTPLReactInstanceInit,
-  RCTPLSize // This is used to count the size
-};
+#import "RCTPLTag.h"
 
 @interface RCTPerformanceLogger : NSObject
 
@@ -95,10 +72,4 @@ typedef NS_ENUM(NSInteger, RCTPLTag) {
  */
 - (int64_t)valueForTag:(RCTPLTag)tag;
 
-/**
- * Returns an array with values for all tags.
- * Use RCTPLTag to go over the array.
- */
-- (NSArray<NSString *> *)labelsForTags;
-
 @end

React/Base/RCTPerformanceLogger.m

@@ -9,54 +9,24 @@
 
 #import "RCTLog.h"
 #import "RCTPerformanceLogger.h"
+#import "RCTPerformanceLoggerLabels.h"
 #import "RCTProfile.h"
 #import "RCTRootView.h"
 
 @interface RCTPerformanceLogger () {
   int64_t _data[RCTPLSize][2];
-  NSUInteger _cookies[RCTPLSize];
+  NSInteger _cookies[RCTPLSize];
 }
 
-@property (nonatomic, copy) NSArray<NSString *> *labelsForTags;
-
 @end
 
 @implementation RCTPerformanceLogger
 
-- (instancetype)init
-{
-  if (self = [super init]) {
-    // Keep this in sync with RCTPLTag
-    _labelsForTags = @[
-      @"ScriptDownload",
-      @"ScriptExecution",
-      @"RAMBundleLoad",
-      @"RAMStartupCodeSize",
-      @"RAMStartupNativeRequires",
-      @"RAMStartupNativeRequiresCount",
-      @"RAMNativeRequires",
-      @"RAMNativeRequiresCount",
-      @"NativeModuleInit",
-      @"NativeModuleMainThread",
-      @"NativeModulePrepareConfig",
-      @"NativeModuleMainThreadUsesCount",
-      @"NativeModuleSetup",
-      @"TurboModuleSetup",
-      @"JSCWrapperOpenLibrary",
-      @"BridgeStartup",
-      @"RootViewTTI",
-      @"BundleSize",
-      @"ReactInstanceInit",
-    ];
-  }
-  return self;
-}
-
 - (void)markStartForTag:(RCTPLTag)tag
 {
 #if RCT_PROFILE
   if (RCTProfileIsProfiling()) {
-    NSString *label = _labelsForTags[tag];
+    NSString *label = RCTPLLabelForTag(tag);
     _cookies[tag] = RCTProfileBeginAsyncEvent(RCTProfileTagAlways, label, nil);
   }
 #endif
@@ -68,7 +38,7 @@ - (void)markStopForTag:(RCTPLTag)tag
 {
 #if RCT_PROFILE
   if (RCTProfileIsProfiling()) {
-    NSString *label = _labelsForTags[tag];
+    NSString *label = RCTPLLabelForTag(tag);
     RCTProfileEndAsyncEvent(RCTProfileTagAlways, @"native", _cookies[tag], label, @"RCTPerformanceLogger");
   }
 #endif

React/Base/RCTPerformanceLoggerLabels.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <React/RCTDefines.h>
+#import "RCTPLTag.h"
+
+// Return the string label for the enum RCTPLTag for performance logging
+__attribute__((used)) RCT_EXTERN NSString *RCTPLLabelForTag(RCTPLTag tag);

React/Base/RCTPerformanceLoggerLabels.m

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RCTPerformanceLoggerLabels.h"
+#import <React/RCTAssert.h>
+
+NSString *RCTPLLabelForTag(RCTPLTag tag)
+{
+  switch (tag) {
+    case RCTPLScriptDownload:
+      return @"ScriptDownload";
+    case RCTPLScriptExecution:
+      return @"ScriptExecution";
+    case RCTPLRAMBundleLoad:
+      return @"RAMBundleLoad";
+    case RCTPLRAMStartupCodeSize:
+      return @"RAMStartupCodeSize";
+    case RCTPLRAMStartupNativeRequires:
+      return @"RAMStartupNativeRequires";
+    case RCTPLRAMStartupNativeRequiresCount:
+      return @"RAMStartupNativeRequiresCount";
+    case RCTPLRAMNativeRequires:
+      return @"RAMNativeRequires";
+    case RCTPLRAMNativeRequiresCount:
+      return @"RAMNativeRequiresCount";
+    case RCTPLNativeModuleInit:
+      return @"NativeModuleInit";
+    case RCTPLNativeModuleMainThread:
+      return @"NativeModuleMainThread";
+    case RCTPLNativeModulePrepareConfig:
+      return @"NativeModulePrepareConfig";
+    case RCTPLNativeModuleMainThreadUsesCount:
+      return @"NativeModuleMainThreadUsesCount";
+    case RCTPLNativeModuleSetup:
+      return @"NativeModuleSetup";
+    case RCTPLTurboModuleSetup:
+      return @"TurboModuleSetup";
+    case RCTPLJSCWrapperOpenLibrary:
+      return @"JSCWrapperOpenLibrary";
+    case RCTPLBridgeStartup:
+      return @"BridgeStartup";
+    case RCTPLTTI:
+      return @"RootViewTTI";
+    case RCTPLBundleSize:
+      return @"BundleSize";
+    case RCTPLReactInstanceInit:
+      return @"ReactInstanceInit";
+    case RCTPLSize: // Only used to count enum size
+      RCTAssert(NO, @"RCTPLSize should not be used to track performance timestamps.");
+      return nil;
+  }
+}

React/CoreModules/RCTPerfMonitor.mm

@@ -24,6 +24,7 @@
 #import <React/RCTInvalidating.h>
 #import <React/RCTJavaScriptExecutor.h>
 #import <React/RCTPerformanceLogger.h>
+#import <React/RCTPerformanceLoggerLabels.h>
 #import <React/RCTRootView.h>
 #import <React/RCTUIManager.h>
 #import <React/RCTUtils.h>
@@ -40,6 +41,8 @@
 
 typedef BOOL (*RCTJSCSetOptionType)(const char *);
 
+NSArray<NSString *> *LabelsForRCTPerformanceLoggerTags();
+
 static BOOL RCTJSCSetOption(const char *option)
 {
   static RCTJSCSetOptionType setOption;
@@ -515,7 +518,7 @@ - (void)loadPerformanceLoggerData
   NSMutableArray<NSString *> *data = [NSMutableArray new];
   RCTPerformanceLogger *performanceLogger = [_bridge performanceLogger];
   NSArray<NSNumber *> *values = [performanceLogger valuesForTags];
-  for (NSString *label in [performanceLogger labelsForTags]) {
+  for (NSString *label in LabelsForRCTPerformanceLoggerTags()) {
     long long value = values[i + 1].longLongValue - values[i].longLongValue;
     NSString *unit = @"ms";
     if ([label hasSuffix:@"Size"]) {
@@ -572,6 +575,15 @@ - (CGFloat)tableView:(__unused UITableView *)tableView heightForRowAtIndexPath:(
 
 @end
 
+NSArray<NSString *> *LabelsForRCTPerformanceLoggerTags()
+{
+  NSMutableArray<NSString *> *labels = [NSMutableArray new];
+  for (int i = 0; i < RCTPLSize; i++) {
+    [labels addObject:RCTPLLabelForTag((RCTPLTag)i)];
+  }
+  return labels;
+}
+
 #endif
 
 Class RCTPerfMonitorCls(void)

packages/rn-tester/Podfile.lock

@@ -891,7 +891,7 @@ SPEC CHECKSUMS:
   CocoaAsyncSocket: 065fd1e645c7abab64f7a6a2007a48038fdc6a99
   DoubleConversion: 831926d9b8bf8166fd87886c4abab286c2422662
   FBLazyVector: b81a2b70c72d8b0aefb652cea22c11e9ffd02949
-  FBReactNativeSpec: 755b7fee1b08aefd74fb2fa9f7312b253719d536
+  FBReactNativeSpec: 5bd61f19eb8d9ab489a9f89f6e862767fbb6cced
   Flipper: 30e8eeeed6abdc98edaf32af0cda2f198be4b733
   Flipper-Boost-iOSX: fd1e2b8cbef7e662a122412d7ac5f5bea715403c
   Flipper-DoubleConversion: 57ffbe81ef95306cc9e69c4aa3aeeeeb58a6a28c
@@ -904,7 +904,7 @@ SPEC CHECKSUMS:
   fmt: ff9d55029c625d3757ed641535fd4a75fedc7ce9
   glog: c10b67b343303f51715e5c5eedb18a41402f350a
   libevent: 4049cae6c81cdb3654a443be001fb9bdceff7913
-  MyNativeView: 4eaeecdc16568e81e702ef0a901127823d1ddc80
+  MyNativeView: 68ba0ad4bcfc2bc9b776a346c70ca9d19a2f2542
   OpenSSL-Universal: 1aa4f6a6ee7256b83db99ec1ccdaa80d10f9af9b
   RCT-Folly: 803a9cfd78114b2ec0f140cfa6fa2a6bafb2d685
   RCTRequired: af2d6080a4b9ba0885b28ca78879a92066c71cab
@@ -934,10 +934,10 @@ SPEC CHECKSUMS:
   React-RCTTest: 12bbd7fc2e72bd9920dc7286c5b8ef96639582b6
   React-RCTText: e9146b2c0550a83d1335bfe2553760070a2d75c7
   React-RCTVibration: 50be9c390f2da76045ef0dfdefa18b9cf9f35cfa
-  React-rncore: d09af3a25cbff0b484776785676c28f3729e07f5
+  React-rncore: 03e9b66d28812371afe3e7f180968f8e2a4ea71e
   React-runtimeexecutor: 4b0c6eb341c7d3ceb5e2385cb0fdb9bf701024f3
   ReactCommon: 7a2714d1128f965392b6f99a8b390e3aa38c9569
-  ScreenshotManager: e8a3fc9b2e24b81127b36cb4ebe0eed65090c949
+  ScreenshotManager: 6923f27c7ce9505117b8c743c9f099fa3054df6a
   Yoga: c0d06f5380d34e939f55420669a60fe08b79bd75
   YogaKit: f782866e155069a2cca2517aafea43200b01fd5a
 

packages/rn-tester/RNTesterUnitTests/RCTPerformanceLoggerTests.m

@@ -15,10 +15,4 @@ @interface RCTPerformanceLoggerTests : XCTestCase
 
 @implementation RCTPerformanceLoggerTests
 
-- (void)testLabelCountInSyncWithRCTPLTag
-{
-  RCTPerformanceLogger *logger = [RCTPerformanceLogger new];
-  XCTAssertEqual([logger labelsForTags].count, RCTPLSize);
-}
-
 @end