- Use a map to lookup libraries by URL.

runtime/vm/object_store.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_OBJECT_STORE_H_
 #define VM_OBJECT_STORE_H_
 
 #include "vm/object.h"
 
 namespace dart {
@@ skipping 314 matching lines @@
   RawLibrary* root_library() const { return root_library_; }
   void set_root_library(const Library& value) {
     root_library_ = value.raw();
   }
 
   RawGrowableObjectArray* libraries() const { return libraries_; }
   void set_libraries(const GrowableObjectArray& value) {
     libraries_ = value.raw();
   }
 
+  RawArray* libraries_map() const { return libraries_map_; }
+  void set_libraries_map(const Array& value) {
+    libraries_map_ = value.raw();
+  }
+
   RawGrowableObjectArray* closure_functions() const {
     return closure_functions_;
   }
   void set_closure_functions(const GrowableObjectArray& value) {
     ASSERT(!value.IsNull());
     closure_functions_ = value.raw();
   }
 
   RawGrowableObjectArray* pending_classes() const { return pending_classes_; }
   void set_pending_classes(const GrowableObjectArray& value) {
@@ skipping 196 matching lines @@
   RawLibrary* internal_library_;
   RawLibrary* isolate_library_;
   RawLibrary* math_library_;
   RawLibrary* mirrors_library_;
   RawLibrary* native_wrappers_library_;
   RawLibrary* profiler_library_;
   RawLibrary* root_library_;
   RawLibrary* typed_data_library_;
   RawLibrary* vmservice_library_;
   RawGrowableObjectArray* libraries_;
+  RawArray* libraries_map_;
   RawGrowableObjectArray* closure_functions_;
   RawGrowableObjectArray* pending_classes_;
   RawGrowableObjectArray* pending_deferred_loads_;
   RawGrowableObjectArray* resume_capabilities_;
   RawGrowableObjectArray* exit_listeners_;
   RawGrowableObjectArray* error_listeners_;
   RawContext* empty_context_;
   RawInstance* stack_overflow_;
   RawInstance* out_of_memory_;
   RawUnhandledException* preallocated_unhandled_exception_;
@@ skipping 32 matching lines @@
   friend class FullSnapshotWriter;
   friend class SnapshotReader;
   friend class VmIsolateSnapshotReader;
 
   DISALLOW_COPY_AND_ASSIGN(ObjectStore);
 };
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_STORE_H_