mirror of
https://github.com/status-im/react-native.git
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4a3857ef1d
Summary: public Benchmarking our startup path has shown we spend a lot of time decoding strings (iPhone 4S / iPhone 5): * reading a 2MB JS bundle: 35ms / 15ms * decoding is to an `NSString`: 186ms / 78ms * transforming that to a `JSString`: 29ms / 10ms Instead of going through an `NSString` transformation, we generate a null-terminated bundle (0.1ms / 0.05ms to copy the data) and use `JSStringCreateWithUTF8CString` (121ms / 53ms) to generate the string. That makes decoding 70% faster. Reviewed By: javache Differential Revision: D2541140 fb-gh-sync-id: 09a016b8edfd46a9b62682c76705564d2024e75e
73 lines
2.3 KiB
Objective-C
73 lines
2.3 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import <objc/runtime.h>
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#import <JavaScriptCore/JavaScriptCore.h>
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#import "RCTBridgeModule.h"
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#import "RCTInvalidating.h"
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typedef void (^RCTJavaScriptCompleteBlock)(NSError *error);
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typedef void (^RCTJavaScriptCallback)(id json, NSError *error);
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/**
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* Abstracts away a JavaScript execution context - we may be running code in a
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* web view (for debugging purposes), or may be running code in a `JSContext`.
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*/
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@protocol RCTJavaScriptExecutor <RCTInvalidating, RCTBridgeModule>
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/**
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* Used to set up the executor after the bridge has been fully initialized.
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* Do any expensive setup in this method instead of `-init`.
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*/
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- (void)setUp;
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/**
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* Whether the executor has been invalidated
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*/
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@property (nonatomic, readonly, getter=isValid) BOOL valid;
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/**
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* Executes given method with arguments on JS thread and calls the given callback
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* with JSValue and JSContext as a result of the JS module call.
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*/
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- (void)executeJSCall:(NSString *)name
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method:(NSString *)method
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arguments:(NSArray *)arguments
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callback:(RCTJavaScriptCallback)onComplete;
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/**
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* Runs an application script, and notifies of the script load being complete via `onComplete`.
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*/
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- (void)executeApplicationScript:(NSData *)script
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sourceURL:(NSURL *)sourceURL
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onComplete:(RCTJavaScriptCompleteBlock)onComplete;
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- (void)injectJSONText:(NSString *)script
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asGlobalObjectNamed:(NSString *)objectName
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callback:(RCTJavaScriptCompleteBlock)onComplete;
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/**
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* Enqueue a block to run in the executors JS thread. Fallback to `dispatch_async`
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* on the main queue if the executor doesn't own a thread.
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*/
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- (void)executeBlockOnJavaScriptQueue:(dispatch_block_t)block;
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@optional
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/**
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* Special case for Timers + ContextExecutor - instead of the default
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* if jsthread then call else dispatch call on jsthread
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* ensure the call is made async on the jsthread
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*/
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- (void)executeAsyncBlockOnJavaScriptQueue:(dispatch_block_t)block;
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@end
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