diff --git a/SDWebImage/SDImageCachesManager.m b/SDWebImage/SDImageCachesManager.m
index 18657853..e8d8d319 100644
--- a/SDWebImage/SDImageCachesManager.m
+++ b/SDWebImage/SDImageCachesManager.m
@@ -18,7 +18,7 @@
 
 @implementation SDImageCachesManager
 {
-    NSMutableArray<id<SDImageCache>> *caches_;
+    NSMutableArray<id<SDImageCache>> *_imageCaches;
 }
 
 + (SDImageCachesManager *)sharedManager {
@@ -39,7 +39,7 @@
         self.containsOperationPolicy = SDImageCachesManagerOperationPolicySerial;
         self.clearOperationPolicy = SDImageCachesManagerOperationPolicyConcurrent;
         // initialize with default image caches
-        caches_ = [NSMutableArray arrayWithObject:[SDImageCache sharedImageCache]];
+        _imageCaches = [NSMutableArray arrayWithObject:[SDImageCache sharedImageCache]];
         _cachesLock = dispatch_semaphore_create(1);
     }
     return self;
@@ -47,16 +47,16 @@
 
 - (NSArray<id<SDImageCache>> *)caches {
     SD_LOCK(self.cachesLock);
-    NSArray<id<SDImageCache>> *caches = [caches_ copy];
+    NSArray<id<SDImageCache>> *caches = [_imageCaches copy];
     SD_UNLOCK(self.cachesLock);
     return caches;
 }
 
 - (void)setCaches:(NSArray<id<SDImageCache>> *)caches {
     SD_LOCK(self.cachesLock);
-    [caches_ removeAllObjects];
+    [_imageCaches removeAllObjects];
     if (caches.count) {
-        [caches_ addObjectsFromArray:caches];
+        [_imageCaches addObjectsFromArray:caches];
     }
     SD_UNLOCK(self.cachesLock);
 }
@@ -68,7 +68,7 @@
         return;
     }
     SD_LOCK(self.cachesLock);
-    [caches_ addObject:cache];
+    [_imageCaches addObject:cache];
     SD_UNLOCK(self.cachesLock);
 }
 
@@ -77,7 +77,7 @@
         return;
     }
     SD_LOCK(self.cachesLock);
-    [caches_ removeObject:cache];
+    [_imageCaches removeObject:cache];
     SD_UNLOCK(self.cachesLock);
 }
 
diff --git a/SDWebImage/SDImageCodersManager.h b/SDWebImage/SDImageCodersManager.h
index cd77091a..14b655da 100644
--- a/SDWebImage/SDImageCodersManager.h
+++ b/SDWebImage/SDImageCodersManager.h
@@ -39,7 +39,7 @@
 /**
  All coders in coders manager. The coders array is a priority queue, which means the later added coder will have the highest priority
  */
-@property (nonatomic, copy, readwrite, nullable) NSArray<id<SDImageCoder>> *coders;
+@property (nonatomic, copy, nullable) NSArray<id<SDImageCoder>> *coders;
 
 /**
  Add a new coder to the end of coders array. Which has the highest priority.
diff --git a/SDWebImage/SDImageCodersManager.m b/SDWebImage/SDImageCodersManager.m
index e358542b..2a25fdb2 100644
--- a/SDWebImage/SDImageCodersManager.m
+++ b/SDWebImage/SDImageCodersManager.m
@@ -18,6 +18,9 @@
 @end
 
 @implementation SDImageCodersManager
+{
+    NSMutableArray<id<SDImageCoder>> *_imageCoders;
+}
 
 + (nonnull instancetype)sharedManager {
     static dispatch_once_t once;
@@ -31,12 +34,30 @@
 - (instancetype)init {
     if (self = [super init]) {
         // initialize with default coders
-        _coders = @[[SDImageIOCoder sharedCoder], [SDImageGIFCoder sharedCoder], [SDImageAPNGCoder sharedCoder]];
+        _imageCoders = [NSMutableArray arrayWithArray:@[[SDImageIOCoder sharedCoder], [SDImageGIFCoder sharedCoder], [SDImageAPNGCoder sharedCoder]]];
         _codersLock = dispatch_semaphore_create(1);
     }
     return self;
 }
 
+- (NSArray<id<SDImageCoder>> *)coders
+{
+    SD_LOCK(self.codersLock);
+    NSArray<id<SDImageCoder>> *coders = [_imageCoders copy];
+    SD_UNLOCK(self.codersLock);
+    return coders;
+}
+
+- (void)setCoders:(NSArray<id<SDImageCoder>> *)coders
+{
+    SD_LOCK(self.codersLock);
+    [_imageCoders removeAllObjects];
+    if (coders.count) {
+        [_imageCoders addObjectsFromArray:coders];
+    }
+    SD_UNLOCK(self.codersLock);
+}
+
 #pragma mark - Coder IO operations
 
 - (void)addCoder:(nonnull id<SDImageCoder>)coder {
@@ -44,12 +65,7 @@
         return;
     }
     SD_LOCK(self.codersLock);
-    NSMutableArray<id<SDImageCoder>> *mutableCoders = [self.coders mutableCopy];
-    if (!mutableCoders) {
-        mutableCoders = [NSMutableArray array];
-    }
-    [mutableCoders addObject:coder];
-    self.coders = [mutableCoders copy];
+    [_imageCoders addObject:coder];
     SD_UNLOCK(self.codersLock);
 }
 
@@ -58,17 +74,13 @@
         return;
     }
     SD_LOCK(self.codersLock);
-    NSMutableArray<id<SDImageCoder>> *mutableCoders = [self.coders mutableCopy];
-    [mutableCoders removeObject:coder];
-    self.coders = [mutableCoders copy];
+    [_imageCoders removeObject:coder];
     SD_UNLOCK(self.codersLock);
 }
 
 #pragma mark - SDImageCoder
 - (BOOL)canDecodeFromData:(NSData *)data {
-    SD_LOCK(self.codersLock);
     NSArray<id<SDImageCoder>> *coders = self.coders;
-    SD_UNLOCK(self.codersLock);
     for (id<SDImageCoder> coder in coders.reverseObjectEnumerator) {
         if ([coder canDecodeFromData:data]) {
             return YES;
@@ -78,9 +90,7 @@
 }
 
 - (BOOL)canEncodeToFormat:(SDImageFormat)format {
-    SD_LOCK(self.codersLock);
     NSArray<id<SDImageCoder>> *coders = self.coders;
-    SD_UNLOCK(self.codersLock);
     for (id<SDImageCoder> coder in coders.reverseObjectEnumerator) {
         if ([coder canEncodeToFormat:format]) {
             return YES;
@@ -94,9 +104,7 @@
         return nil;
     }
     UIImage *image;
-    SD_LOCK(self.codersLock);
     NSArray<id<SDImageCoder>> *coders = self.coders;
-    SD_UNLOCK(self.codersLock);
     for (id<SDImageCoder> coder in coders.reverseObjectEnumerator) {
         if ([coder canDecodeFromData:data]) {
             image = [coder decodedImageWithData:data options:options];
@@ -111,9 +119,7 @@
     if (!image) {
         return nil;
     }
-    SD_LOCK(self.codersLock);
     NSArray<id<SDImageCoder>> *coders = self.coders;
-    SD_UNLOCK(self.codersLock);
     for (id<SDImageCoder> coder in coders.reverseObjectEnumerator) {
         if ([coder canEncodeToFormat:format]) {
             return [coder encodedDataWithImage:image format:format options:options];
diff --git a/SDWebImage/SDImageLoadersManager.h b/SDWebImage/SDImageLoadersManager.h
index 651b5e9e..948ca3fa 100644
--- a/SDWebImage/SDImageLoadersManager.h
+++ b/SDWebImage/SDImageLoadersManager.h
@@ -18,7 +18,7 @@
 /**
  All image loaders in manager. The loaders array is a priority queue, which means the later added loader will have the highest priority
  */
-@property (nonatomic, copy, readwrite, nullable) NSArray<id<SDImageLoader>>* loaders;
+@property (nonatomic, copy, nullable) NSArray<id<SDImageLoader>>* loaders;
 
 /**
  Add a new image loader to the end of loaders array. Which has the highest priority.
diff --git a/SDWebImage/SDImageLoadersManager.m b/SDWebImage/SDImageLoadersManager.m
index ecb476c5..91e0d941 100644
--- a/SDWebImage/SDImageLoadersManager.m
+++ b/SDWebImage/SDImageLoadersManager.m
@@ -16,6 +16,9 @@
 @end
 
 @implementation SDImageLoadersManager
+{
+    NSMutableArray<id<SDImageLoader>>* _imageLoaders;
+}
 
 + (SDImageLoadersManager *)sharedManager {
     static dispatch_once_t onceToken;
@@ -30,12 +33,28 @@
     self = [super init];
     if (self) {
         // initialize with default image loaders
-        _loaders = @[[SDWebImageDownloader sharedDownloader]];
+        _imageLoaders = [NSMutableArray arrayWithObject:[SDWebImageDownloader sharedDownloader]];
         _loadersLock = dispatch_semaphore_create(1);
     }
     return self;
 }
 
+- (NSArray<id<SDImageLoader>> *)loaders {
+    SD_LOCK(self.loadersLock);
+    NSArray<id<SDImageLoader>>* loaders = [_imageLoaders copy];
+    SD_UNLOCK(self.loadersLock);
+    return loaders;
+}
+
+- (void)setLoaders:(NSArray<id<SDImageLoader>> *)loaders {
+    SD_LOCK(self.loadersLock);
+    [_imageLoaders removeAllObjects];
+    if (loaders.count) {
+        [_imageLoaders addObjectsFromArray:loaders];
+    }
+    SD_UNLOCK(self.loadersLock);
+}
+
 #pragma mark - Loader Property
 
 - (void)addLoader:(id<SDImageLoader>)loader {
@@ -43,12 +62,7 @@
         return;
     }
     SD_LOCK(self.loadersLock);
-    NSMutableArray<id<SDImageLoader>> *mutableLoaders = [self.loaders mutableCopy];
-    if (!mutableLoaders) {
-        mutableLoaders = [NSMutableArray array];
-    }
-    [mutableLoaders addObject:loader];
-    self.loaders = [mutableLoaders copy];
+    [_imageLoaders addObject:loader];
     SD_UNLOCK(self.loadersLock);
 }
 
@@ -57,18 +71,14 @@
         return;
     }
     SD_LOCK(self.loadersLock);
-    NSMutableArray<id<SDImageLoader>> *mutableLoaders = [self.loaders mutableCopy];
-    [mutableLoaders removeObject:loader];
-    self.loaders = [mutableLoaders copy];
+    [_imageLoaders removeObject:loader];
     SD_UNLOCK(self.loadersLock);
 }
 
 #pragma mark - SDImageLoader
 
 - (BOOL)canRequestImageForURL:(nullable NSURL *)url {
-    SD_LOCK(self.loadersLock);
     NSArray<id<SDImageLoader>> *loaders = self.loaders;
-    SD_UNLOCK(self.loadersLock);
     for (id<SDImageLoader> loader in loaders.reverseObjectEnumerator) {
         if ([loader canRequestImageForURL:url]) {
             return YES;
@@ -81,9 +91,7 @@
     if (!url) {
         return nil;
     }
-    SD_LOCK(self.loadersLock);
     NSArray<id<SDImageLoader>> *loaders = self.loaders;
-    SD_UNLOCK(self.loadersLock);
     for (id<SDImageLoader> loader in loaders.reverseObjectEnumerator) {
         if ([loader canRequestImageForURL:url]) {
             return [loader requestImageWithURL:url options:options context:context progress:progressBlock completed:completedBlock];