Registering native modules optimization

Author: ikhvorost

Sources/ReactBridgeUtils/ReactBridgeUtils.m

@@ -35,33 +35,37 @@
   BOOL isSync;
 } RCTMethodInfo;
 
-@implementation ReactBridgeUtils
-
-+ (void)load {
-  SEL selector = @selector(_registerModule);
-  
-  int numClasses = objc_getClassList(NULL, 0);
-  Class* classes = (Class *)malloc(sizeof(Class) * numClasses);
-  numClasses = objc_getClassList(classes, numClasses);
-  
-  for (int i = 0; i < numClasses; i++) {
-    Class class = classes[i];
-    
-    unsigned int numMethods = 0;
-    Method *methods = class_copyMethodList(object_getClass(class), &numMethods);
-    for (int j = 0; j < numMethods; j++) {
-      Method method = methods[j];
-      if (sel_isEqual(method_getName(method), selector)) {
-        IMP imp = method_getImplementation(method);
-        ((void (*)(Class, SEL))imp)(class, selector);
-        continue;
-      }
+static void class_performClassSelector(Class class, SEL selector) {
+  unsigned int numMethods = 0;
+  Method *methods = class_copyMethodList(object_getClass(class), &numMethods);
+  for (int i = 0; i < numMethods; i++) {
+    Method method = methods[i];
+    if (sel_isEqual(method_getName(method), selector)) {
+      IMP imp = method_getImplementation(method);
+      ((void (*)(Class, SEL))imp)(class, selector);
+      break;
     }
-    free(methods);
   }
-  free(classes);
+  free(methods);
 }
 
+__attribute__((constructor))
+static void load() {
+  dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+    SEL selector = @selector(_registerModule);
+    int numClasses = objc_getClassList(NULL, 0);
+    Class* classes = (Class *)malloc(sizeof(Class) * numClasses);
+    numClasses = objc_getClassList(classes, numClasses);
+    for (int i = 0; i < numClasses; i++) {
+      Class class = classes[i];
+      class_performClassSelector(class, selector);
+    }
+    free(classes);
+  });
+}
+
+@implementation ReactBridgeUtils
+
 + (const void *)methodInfo:(NSString *)jsName objcName:(NSString *)objcName isSync:(BOOL)isSync {
   RCTMethodInfo* methodInfo = malloc(sizeof(RCTMethodInfo));
   methodInfo->jsName = strdup([jsName cStringUsingEncoding: NSUTF8StringEncoding]);