Don't call dinvoke on Object methods

lib/runtime/dart/core.js

 var core;
 (function(exports) {
   'use strict';
   class Object {
     constructor() {
       var name = this.constructor.name;
       var init = this[name];
       var result = void 0;
       if (init)
         result = init.apply(this, arguments);
@@ skipping 2709 matching lines @@
     }
     ['=='](other) {
       if (!dart.is(other, Uri))
         return false;
       let uri = dart.as(other, Uri);
       return dart.notNull(this.scheme == uri.scheme) && this.hasAuthority == uri.hasAuthority && dart.notNull(this.userInfo == uri.userInfo) && dart.notNull(this.host == uri.host) && this.port == uri.port && dart.notNull(this.path == uri.path) && this.hasQuery == uri.hasQuery && dart.notNull(this.query == uri.query) && this.hasFragment == uri.hasFragment && dart.notNull(this.fragment == uri.fragment);
     }
     get hashCode() {
       // Function combine: (dynamic, dynamic) → int
       function combine(part, current) {
-        return dart.as(dart.dbinary(dart.dbinary(dart.dbinary(current, '*', 31), '+', dart.dload(part, 'hashCode')), '&', 1073741823), int);
+        return dart.as(dart.dbinary(dart.dbinary(dart.dbinary(current, '*', 31), '+', part.hashCode), '&', 1073741823), int);
       }
       return combine(this.scheme, combine(this.userInfo, combine(this.host, combine(this.port, combine(this.path, combine(this.query, combine(this.fragment, 1)))))));
     }
     static [_addIfNonEmpty](sb, test, first, second) {
       if ("" != test) {
         sb.write(first);
         sb.write(second);
       }
     }
     static encodeComponent(component) {
@@ skipping 348 matching lines @@
   exports.StackTrace = StackTrace;
   exports.Stopwatch = Stopwatch;
   exports.String = String;
   exports.RuneIterator = RuneIterator;
   exports.StringBuffer = StringBuffer;
   exports.StringSink = StringSink;
   exports.Symbol = Symbol;
   exports.Type = Type;
   exports.Uri = Uri;
 })(core || (core = {}));