diff --git a/MTDemo/MTDemo.xcodeproj/xcshareddata/xcbaselines/A4DB9EEB1FA709A400826A8F.xcbaseline/911AE3C1-0374-4D8D-86ED-1B16997177D6.plist b/MTDemo/MTDemo.xcodeproj/xcshareddata/xcbaselines/A4DB9EEB1FA709A400826A8F.xcbaseline/911AE3C1-0374-4D8D-86ED-1B16997177D6.plist
index 9d6b7f6..d801dab 100644
--- a/MTDemo/MTDemo.xcodeproj/xcshareddata/xcbaselines/A4DB9EEB1FA709A400826A8F.xcbaseline/911AE3C1-0374-4D8D-86ED-1B16997177D6.plist
+++ b/MTDemo/MTDemo.xcodeproj/xcshareddata/xcbaselines/A4DB9EEB1FA709A400826A8F.xcbaseline/911AE3C1-0374-4D8D-86ED-1B16997177D6.plist
@@ -11,7 +11,7 @@
 				<key>com.apple.XCTPerformanceMetric_WallClockTime</key>
 				<dict>
 					<key>baselineAverage</key>
-					<real>1.17</real>
+					<real>0.118</real>
 					<key>baselineIntegrationDisplayName</key>
 					<string>Local Baseline</string>
 				</dict>
diff --git a/MTDemo/MTDemo/SuperStub.m b/MTDemo/MTDemo/SuperStub.m
index b6238dc..3cc1697 100644
--- a/MTDemo/MTDemo/SuperStub.m
+++ b/MTDemo/MTDemo/SuperStub.m
@@ -11,8 +11,8 @@
 @implementation SuperStub
 
 - (void)foo:(NSDate *)arg {
-//    NSLog(@"SuperStub foo: %@", arg);
-    [NSThread sleepForTimeInterval:0.001];
+    NSLog(@"SuperStub foo: %@", arg);
+//    [NSThread sleepForTimeInterval:0.0001];
 }
 
 + (void)foo:(NSDate *)arg {
diff --git a/MessageThrottle.podspec b/MessageThrottle.podspec
index aa42bec..68348a2 100644
--- a/MessageThrottle.podspec
+++ b/MessageThrottle.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
 s.name         = "MessageThrottle"
-s.version      = "1.2.1"
+s.version      = "1.2.2"
 s.summary      = "A lightweight Objective-C message throttle and debounce library."
 s.description  = <<-DESC
 MessageThrottle is a lightweight, simple library for controlling frequency of forwarding Objective-C messages. You can choose to control existing methods per instance or per class. It's an implementation of function throttle/debounce developed with Objective-C runtime. 
diff --git a/MessageThrottle/MessageThrottle.m b/MessageThrottle/MessageThrottle.m
index dee55b7..6c74d0f 100644
--- a/MessageThrottle/MessageThrottle.m
+++ b/MessageThrottle/MessageThrottle.m
@@ -159,7 +159,7 @@ - (instancetype)init
     self = [super init];
     if (self) {
         _targetSELs = [NSMapTable weakToStrongObjectsMapTable];
-        _aliasSelectorCache = [NSMapTable mapTableWithKeyOptions:NSPointerFunctionsOpaqueMemory | NSMapTableObjectPointerPersonality                                                    valueOptions:NSPointerFunctionsOpaqueMemory | NSMapTableObjectPointerPersonality];
+        _aliasSelectorCache = [NSMapTable mapTableWithKeyOptions:NSPointerFunctionsOpaqueMemory | NSMapTableObjectPointerPersonality valueOptions:NSPointerFunctionsOpaqueMemory | NSMapTableObjectPointerPersonality];
         pthread_mutex_init(&mutex, NULL);
         pthread_mutex_init(&alias_selector_mutex, NULL);
     }
diff --git a/README.md b/README.md
index db34cf3..31deb77 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@ MessageThrottle is a lightweight, simple library for controlling frequency of fo
 
 - [Objective-C Message Throttle and Debounce](http://yulingtianxia.com/blog/2017/11/05/Objective-C-Message-Throttle-and-Debounce/)
 - [Associated Object and Dealloc](http://yulingtianxia.com/blog/2017/12/15/Associated-Object-and-Dealloc/)
+- [MessageThrottle Performance Benchmark and Optimization](http://yulingtianxia.com/blog/2018/05/31/MessageThrottle-Performance-Benchmark-and-Optimization/)
 
 ## 🌟 Features