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[AS*ImageNode] dispatch to the background before scheduling image download request (perf).

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This commit is contained in:
Scott Goodson
2016-02-20 13:01:03 -08:00
parent cd6ca2885e
commit ca8357a364
2 changed files with 66 additions and 59 deletions
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42
AsyncDisplayKit/ASNetworkImageNode.mm
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@@ -13,6 +13,7 @@
#import "ASDisplayNode+FrameworkPrivate.h"
#import "ASEqualityHelpers.h"
#import "ASThread.h"
#import "ASInternalHelpers.h"
#if PIN_REMOTE_IMAGE
#import "ASPINRemoteImageDownloader.h"
@@ -263,25 +264,28 @@
- (void)_downloadImageWithCompletion:(void (^)(UIImage *image, NSError*, id downloadIdentifier))finished
{
if (_downloaderSupportsNewProtocol) {
_downloadIdentifier = [_downloader downloadImageWithURL:_URL
callbackQueue:dispatch_get_main_queue()
downloadProgress:NULL
completion:^(UIImage * _Nullable image, NSError * _Nullable error, id _Nullable downloadIdentifier) {
if (finished != NULL) {
finished(image, error, downloadIdentifier);
}
}];
} else {
_downloadIdentifier = [_downloader downloadImageWithURL:_URL
callbackQueue:dispatch_get_main_queue()
downloadProgressBlock:NULL
completion:^(CGImageRef responseImage, NSError *error) {
if (finished != NULL) {
finished([UIImage imageWithCGImage:responseImage], error, nil);
}
}];
}
ASPerformBlockOnBackgroundThread(^{
ASDN::MutexLocker l(_lock);
if (_downloaderSupportsNewProtocol) {
_downloadIdentifier = [_downloader downloadImageWithURL:_URL
callbackQueue:dispatch_get_main_queue()
downloadProgress:NULL
completion:^(UIImage * _Nullable image, NSError * _Nullable error, id _Nullable downloadIdentifier) {
if (finished != NULL) {
finished(image, error, downloadIdentifier);
}
}];
} else {
_downloadIdentifier = [_downloader downloadImageWithURL:_URL
callbackQueue:dispatch_get_main_queue()
downloadProgressBlock:NULL
completion:^(CGImageRef responseImage, NSError *error) {
if (finished != NULL) {
finished([UIImage imageWithCGImage:responseImage], error, nil);
}
}];
}
});
}
- (void)_lazilyLoadImageIfNecessary