diff --git a/SDWebImage/SDWebImageDownloaderOperation.m b/SDWebImage/SDWebImageDownloaderOperation.m
index 8bdfa27a..2a40af00 100644
--- a/SDWebImage/SDWebImageDownloaderOperation.m
+++ b/SDWebImage/SDWebImageDownloaderOperation.m
@@ -361,11 +361,13 @@ didReceiveResponse:(NSURLResponse *)response
         
         // progressive decode the image in coder queue
         dispatch_async(self.coderQueue, ^{
-            UIImage *image = SDImageLoaderDecodeProgressiveImageData(imageData, self.request.URL, finished, self, [[self class] imageOptionsFromDownloaderOptions:self.options], self.context);
-            if (image) {
-                // We do not keep the progressive decoding image even when `finished`=YES. Because they are for view rendering but not take full function from downloader options. And some coders implementation may not keep consistent between progressive decoding and normal decoding.
-                
-                [self callCompletionBlocksWithImage:image imageData:nil error:nil finished:NO];
+            @autoreleasepool {
+                UIImage *image = SDImageLoaderDecodeProgressiveImageData(imageData, self.request.URL, finished, self, [[self class] imageOptionsFromDownloaderOptions:self.options], self.context);
+                if (image) {
+                    // We do not keep the progressive decoding image even when `finished`=YES. Because they are for view rendering but not take full function from downloader options. And some coders implementation may not keep consistent between progressive decoding and normal decoding.
+                    
+                    [self callCompletionBlocksWithImage:image imageData:nil error:nil finished:NO];
+                }
             }
         });
     }
@@ -428,14 +430,16 @@ didReceiveResponse:(NSURLResponse *)response
                 } else {
                     // decode the image in coder queue
                     dispatch_async(self.coderQueue, ^{
-                        UIImage *image = SDImageLoaderDecodeImageData(imageData, self.request.URL, [[self class] imageOptionsFromDownloaderOptions:self.options], self.context);
-                        CGSize imageSize = image.size;
-                        if (imageSize.width == 0 || imageSize.height == 0) {
-                            [self callCompletionBlocksWithError:[NSError errorWithDomain:SDWebImageErrorDomain code:SDWebImageErrorBadImageData userInfo:@{NSLocalizedDescriptionKey : @"Downloaded image has 0 pixels"}]];
-                        } else {
-                            [self callCompletionBlocksWithImage:image imageData:imageData error:nil finished:YES];
+                        @autoreleasepool {
+                            UIImage *image = SDImageLoaderDecodeImageData(imageData, self.request.URL, [[self class] imageOptionsFromDownloaderOptions:self.options], self.context);
+                            CGSize imageSize = image.size;
+                            if (imageSize.width == 0 || imageSize.height == 0) {
+                                [self callCompletionBlocksWithError:[NSError errorWithDomain:SDWebImageErrorDomain code:SDWebImageErrorBadImageData userInfo:@{NSLocalizedDescriptionKey : @"Downloaded image has 0 pixels"}]];
+                            } else {
+                                [self callCompletionBlocksWithImage:image imageData:imageData error:nil finished:YES];
+                            }
+                            [self done];
                         }
-                        [self done];
                     });
                 }
             } else {
diff --git a/SDWebImage/SDWebImageManager.m b/SDWebImage/SDWebImageManager.m
index 31f4145a..4f40307a 100644
--- a/SDWebImage/SDWebImageManager.m
+++ b/SDWebImage/SDWebImageManager.m
@@ -282,29 +282,33 @@ static id<SDImageLoader> _defaultImageLoader;
                 id<SDWebImageCacheSerializer> cacheSerializer = context[SDWebImageContextCacheSerializer];
                 if (downloadedImage && (!downloadedImage.sd_isAnimated || (options & SDWebImageTransformAnimatedImage)) && transformer) {
                     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
-                        UIImage *transformedImage = [transformer transformedImageWithImage:downloadedImage forKey:key];
-                        if (transformedImage && finished) {
-                            NSString *transformerKey = [transformer transformerKey];
-                            NSString *cacheKey = SDTransformedKeyForKey(key, transformerKey);
-                            BOOL imageWasTransformed = ![transformedImage isEqual:downloadedImage];
-                            NSData *cacheData;
-                            // pass nil if the image was transformed, so we can recalculate the data from the image
-                            if (cacheSerializer) {
-                                cacheData = [cacheSerializer cacheDataWithImage:transformedImage  originalData:(imageWasTransformed ? nil : downloadedData) imageURL:url];
-                            } else {
-                                cacheData = (imageWasTransformed ? nil : downloadedData);
+                        @autoreleasepool {
+                            UIImage *transformedImage = [transformer transformedImageWithImage:downloadedImage forKey:key];
+                            if (transformedImage && finished) {
+                                NSString *transformerKey = [transformer transformerKey];
+                                NSString *cacheKey = SDTransformedKeyForKey(key, transformerKey);
+                                BOOL imageWasTransformed = ![transformedImage isEqual:downloadedImage];
+                                NSData *cacheData;
+                                // pass nil if the image was transformed, so we can recalculate the data from the image
+                                if (cacheSerializer) {
+                                    cacheData = [cacheSerializer cacheDataWithImage:transformedImage  originalData:(imageWasTransformed ? nil : downloadedData) imageURL:url];
+                                } else {
+                                    cacheData = (imageWasTransformed ? nil : downloadedData);
+                                }
+                                [self.imageCache storeImage:transformedImage imageData:cacheData forKey:cacheKey cacheType:storeCacheType completion:nil];
                             }
-                            [self.imageCache storeImage:transformedImage imageData:cacheData forKey:cacheKey cacheType:storeCacheType completion:nil];
+                            
+                            [self callCompletionBlockForOperation:strongOperation completion:completedBlock image:transformedImage data:downloadedData error:nil cacheType:SDImageCacheTypeNone finished:finished url:url];
                         }
-                        
-                        [self callCompletionBlockForOperation:strongOperation completion:completedBlock image:transformedImage data:downloadedData error:nil cacheType:SDImageCacheTypeNone finished:finished url:url];
                     });
                 } else {
                     if (downloadedImage && finished) {
                         if (cacheSerializer) {
                             dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
-                                NSData *cacheData = [cacheSerializer cacheDataWithImage:downloadedImage originalData:downloadedData imageURL:url];
-                                [self.imageCache storeImage:downloadedImage imageData:cacheData forKey:key cacheType:storeCacheType completion:nil];
+                                @autoreleasepool {
+                                    NSData *cacheData = [cacheSerializer cacheDataWithImage:downloadedImage originalData:downloadedData imageURL:url];
+                                    [self.imageCache storeImage:downloadedImage imageData:cacheData forKey:key cacheType:storeCacheType completion:nil];
+                                }
                             });
                         } else {
                             [self.imageCache storeImage:downloadedImage imageData:downloadedData forKey:key cacheType:storeCacheType completion:nil];