The used helper method will be called again when changing the URL even if the URL is not the same

[qingdaojunzuo]

The code implemented in router_client.js: dispatch shown as below,

Line 96 : this._currentController = controller;
...
Line 141: if (this._currentController == controller)
Line 142 this._currentDep.changed();

If set created or old controller to current one on line 96, the check on line 141 is always true. Is this right? Or it is the design?

Currently, I see that the helper method will be called again when page changed even if the URL is not the same.
Do the helper methods or other autorun blocks need to be called again when page changed if URL is not the same?

Thanks a lot.