javascript - Will a 'JavaScriptResult' return to an 'eval' in MVC and effect site performance? -

i looking ways redirect ajax request , came across solution:

return javascript("window.location = 'http://www.google.co.uk'"); 

i told might wrapped in eval upon return, can change how code compiled , effect efficiency.

eval("window.location = 'http://www.google.co.uk'"); //actually gets executed 

i told change return redirect url.

two questions this:

1) executing eval, in 'success' through ajax request, effect compilation of other javascript?

2) happens when return post javascript actionresult? run inside eval (implicitly)?

// in mvc controller [httppost] public actionresult myaction() {     return jsonresult("window.location = 'url'"); }  // in javascript $.ajax({     type: 'post',     url: '/myaction' }); 

javascriptresult returns javascript client, can, instance, access <script> element:

<script src="/mycoolcontroller/givemescript?param5=7"></script> 

how javascript gets executed you.

i don't see why performance of eval() concern if objective redirect page, sounds pretty questionable approach (especially if involves eval()).

why not return jsonresult indicates redirect using pre-decided convention, , have script act accordingly:

// in controller return jsonresult(new { redirectto = "http://www.google.co.uk" }); 

// in script $.ajax({     type: 'post',     url: '...',     success: function (result) {         if (result.redirectto) {             window.location = result.redirectto;         }         // handle result if not redirecting ...     } });