b03446e27e
Summary:
@public
`RCTUIManager` would traverse the whole view hierarchy every time there was any
call from JS to Native to call `reactBridgeDidFinishTransaction` on the views
that would respond to it. This is a deprecated method that is only implemented
by 3 classes, so for now we keep track of these views as they're created and
just iterate through them on updates.
Test Plan:
> NOTE: I tested this on UIExplorer, since the internally none of the classes are used
I tried to keep it simple, so I added the following to the old code:
```
__block NSUInteger count = 0;
UIView *rootView = _viewRegistry[rootViewTag];
RCTTraverseViewNodes(rootView, ^(id<RCTViewNodeProtocol> view) {
count ++;
if ([view respondsToSelector:@selector(reactBridgeDidFinishTransaction)]) {
[view reactBridgeDidFinishTransaction];
}
});
NSLog(@"Views iterated: %zd", count);
```
The output after scrolling 20 sections of the `<ListView> - Paging` example was
```
2015-06-01 00:47:07.351 UIExplorer[67675:1709506] Views iterated: 1549
```
*every frame*
After the change
```
for (id<RCTViewNodeProtocol> node in _bridgeTransactionListeners) {
[node reactBridgeDidFinishTransaction];
}
NSLog(@"Views iterated: %zd", _bridgeTransactionListeners.count);
```
```
2015-06-01 00:51:23.715 UIExplorer[70355:1716465] Views iterated: 3
```
No matter how many pages are loaded, the output is always 3.
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|---|---|---|
| .. | ||
| RCTAlertManager.h | ||
| RCTAlertManager.m | ||
| RCTAppState.h | ||
| RCTAppState.m | ||
| RCTAsyncLocalStorage.h | ||
| RCTAsyncLocalStorage.m | ||
| RCTExceptionsManager.h | ||
| RCTExceptionsManager.m | ||
| RCTSourceCode.h | ||
| RCTSourceCode.m | ||
| RCTStatusBarManager.h | ||
| RCTStatusBarManager.m | ||
| RCTTiming.h | ||
| RCTTiming.m | ||
| RCTUIManager.h | ||
| RCTUIManager.m | ||