diff --git a/SDWebImage/Core/SDWebImagePrefetcher.m b/SDWebImage/Core/SDWebImagePrefetcher.m
index b6632fa6..91cbd9a7 100644
--- a/SDWebImage/Core/SDWebImagePrefetcher.m
+++ b/SDWebImage/Core/SDWebImagePrefetcher.m
@@ -111,49 +111,47 @@
 
 - (void)startPrefetchWithToken:(SDWebImagePrefetchToken * _Nonnull)token {
     for (NSURL *url in token.urls) {
-        @autoreleasepool {
-            @weakify(self);
-            SDAsyncBlockOperation *prefetchOperation = [SDAsyncBlockOperation blockOperationWithBlock:^(SDAsyncBlockOperation * _Nonnull asyncOperation) {
+        @weakify(self);
+        SDAsyncBlockOperation *prefetchOperation = [SDAsyncBlockOperation blockOperationWithBlock:^(SDAsyncBlockOperation * _Nonnull asyncOperation) {
+            @strongify(self);
+            if (!self || asyncOperation.isCancelled) {
+                return;
+            }
+            id<SDWebImageOperation> operation = [self.manager loadImageWithURL:url options:self.options context:self.context progress:nil completed:^(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, SDImageCacheType cacheType, BOOL finished, NSURL * _Nullable imageURL) {
                 @strongify(self);
-                if (!self || asyncOperation.isCancelled) {
+                if (!self) {
                     return;
                 }
-                id<SDWebImageOperation> operation = [self.manager loadImageWithURL:url options:self.options context:self.context progress:nil completed:^(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, SDImageCacheType cacheType, BOOL finished, NSURL * _Nullable imageURL) {
-                    @strongify(self);
-                    if (!self) {
-                        return;
+                if (!finished) {
+                    return;
+                }
+                atomic_fetch_add_explicit(&(token->_finishedCount), 1, memory_order_relaxed);
+                if (error) {
+                    // Add last failed
+                    atomic_fetch_add_explicit(&(token->_skippedCount), 1, memory_order_relaxed);
+                }
+                
+                // Current operation finished
+                [self callProgressBlockForToken:token imageURL:imageURL];
+                
+                if (atomic_load_explicit(&(token->_finishedCount), memory_order_relaxed) == token->_totalCount) {
+                    // All finished
+                    if (!atomic_flag_test_and_set_explicit(&(token->_isAllFinished), memory_order_relaxed)) {
+                        [self callCompletionBlockForToken:token];
+                        [self removeRunningToken:token];
                     }
-                    if (!finished) {
-                        return;
-                    }
-                    atomic_fetch_add_explicit(&(token->_finishedCount), 1, memory_order_relaxed);
-                    if (error) {
-                        // Add last failed
-                        atomic_fetch_add_explicit(&(token->_skippedCount), 1, memory_order_relaxed);
-                    }
-                    
-                    // Current operation finished
-                    [self callProgressBlockForToken:token imageURL:imageURL];
-                    
-                    if (atomic_load_explicit(&(token->_finishedCount), memory_order_relaxed) == token->_totalCount) {
-                        // All finished
-                        if (!atomic_flag_test_and_set_explicit(&(token->_isAllFinished), memory_order_relaxed)) {
-                            [self callCompletionBlockForToken:token];
-                            [self removeRunningToken:token];
-                        }
-                    }
-                    [asyncOperation complete];
-                }];
-                NSAssert(operation != nil, @"Operation should not be nil, [SDWebImageManager loadImageWithURL:options:context:progress:completed:] break prefetch logic");
-                SD_LOCK(token->_loadOperationsLock);
-                [token.loadOperations addPointer:(__bridge void *)operation];
-                SD_UNLOCK(token->_loadOperationsLock);
+                }
+                [asyncOperation complete];
             }];
-            SD_LOCK(token->_prefetchOperationsLock);
-            [token.prefetchOperations addPointer:(__bridge void *)prefetchOperation];
-            SD_UNLOCK(token->_prefetchOperationsLock);
-            [self.prefetchQueue addOperation:prefetchOperation];
-        }
+            NSAssert(operation != nil, @"Operation should not be nil, [SDWebImageManager loadImageWithURL:options:context:progress:completed:] break prefetch logic");
+            SD_LOCK(token->_loadOperationsLock);
+            [token.loadOperations addPointer:(__bridge void *)operation];
+            SD_UNLOCK(token->_loadOperationsLock);
+        }];
+        SD_LOCK(token->_prefetchOperationsLock);
+        [token.prefetchOperations addPointer:(__bridge void *)prefetchOperation];
+        SD_UNLOCK(token->_prefetchOperationsLock);
+        [self.prefetchQueue addOperation:prefetchOperation];
     }
 }