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Restricted image decoding to 2 simultaneous threads 

Reviewed By: zjj010104

Differential Revision: D2922292

fb-gh-sync-id: eddd47d02fc721acc1da69e7483c6570997320b5
shipit-source-id: eddd47d02fc721acc1da69e7483c6570997320b5
This commit is contained in:
Nick Lockwood 2016-02-10 12:48:41 -08:00 committed by facebook-github-bot-7
parent f2a60a202f
commit 915e5826ef
1 changed files with 9 additions and 2 deletions
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11
Libraries/Image/RCTImageLoader.m
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@ -38,6 +38,7 @@
{ {
NSArray<id<RCTImageURLLoader>> *_loaders; NSArray<id<RCTImageURLLoader>> *_loaders;
NSArray<id<RCTImageDataDecoder>> *_decoders; NSArray<id<RCTImageDataDecoder>> *_decoders;
NSOperationQueue *_imageDecodeQueue;
dispatch_queue_t _URLCacheQueue; dispatch_queue_t _URLCacheQueue;
NSURLCache *_URLCache; NSURLCache *_URLCache;
} }
@ -474,7 +475,13 @@ static UIImage *RCTResizeImageIfNeeded(UIImage *image,
completionHandler:completionHandler]; completionHandler:completionHandler];
} else { } else {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ // Serialize decoding to prevent excessive memory usage
if (!_imageDecodeQueue) {
_imageDecodeQueue = [NSOperationQueue new];
_imageDecodeQueue.name = @"com.facebook.react.ImageDecoderQueue";
_imageDecodeQueue.maxConcurrentOperationCount = 2;
}
[_imageDecodeQueue addOperationWithBlock:^{
if (cancelled) { if (cancelled) {
return; return;
} }
@ -501,7 +508,7 @@ static UIImage *RCTResizeImageIfNeeded(UIImage *image,
NSError *finalError = RCTErrorWithMessage(errorMessage); NSError *finalError = RCTErrorWithMessage(errorMessage);
completionHandler(finalError, nil); completionHandler(finalError, nil);
} }
}); }];
return ^{ return ^{
OSAtomicOr32Barrier(1, &cancelled); OSAtomicOr32Barrier(1, &cancelled);