Export 'ko.computed' functions just once, not per-instance

src/subscribables/dependentObservable.js

@@ -80,11 +80,6 @@ ko.computed = ko.dependentObservable = function (evaluatorFunctionOrOptions, eva
         ko.utils.extend(dependentObservable, deferEvaluationOverrides);
     }
 
-    ko.exportProperty(dependentObservable, 'peek', dependentObservable.peek);
-    ko.exportProperty(dependentObservable, 'dispose', dependentObservable.dispose);
-    ko.exportProperty(dependentObservable, 'isActive', dependentObservable.isActive);
-    ko.exportProperty(dependentObservable, 'getDependenciesCount', dependentObservable.getDependenciesCount);
-
     // Add a "disposeWhen" callback that, on each evaluation, disposes if the node was removed without using ko.removeNode.
     if (state.disposeWhenNodeIsRemoved) {
         // Since this computed is associated with a DOM node, and we don't want to dispose the computed
@@ -419,6 +414,11 @@ ko.exportSymbol('dependentObservable', ko.dependentObservable);
 ko.exportSymbol('computed', ko.dependentObservable); // Make "ko.computed" an alias for "ko.dependentObservable"
 ko.exportSymbol('isComputed', ko.isComputed);
 
+ko.exportProperty(ko.dependentObservable['fn'], 'peek', ko.dependentObservable['fn'].peek);
+ko.exportProperty(ko.dependentObservable['fn'], 'dispose', ko.dependentObservable['fn'].dispose);
+ko.exportProperty(ko.dependentObservable['fn'], 'isActive', ko.dependentObservable['fn'].isActive);
+ko.exportProperty(ko.dependentObservable['fn'], 'getDependenciesCount', ko.dependentObservable['fn'].getDependenciesCount);
+
 ko.pureComputed = function (evaluatorFunctionOrOptions, evaluatorFunctionTarget) {
     if (typeof evaluatorFunctionOrOptions === 'function') {
         return ko.computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, {'pure':true});