I am using symfony2 for my application I am making my all js and css files in one file using the following code

```
{% block stylesheets %}
        {% stylesheets
            'updated/lib/bootstrap-datepicker/css/datepicker3.css'
            'updated/lib/prism/prism_default.css'
            'updated/lib/select2/select2.css'
            'updated/css/style.css'
            output='css/complete-registration.css'
            filter='cssrewrite'
            filter='yui_css'
    %}
    {% endstylesheets %}
<link rel="stylesheet" href="{{ asset('css/complete-registration.css') }}" />

```

It works fine for me but problem is during my development whenever i change any thing on my js and css file I have to generate assets again which takes too much time so anyone can suggest me any thing.

what I do that i dont have to generate assets in my development environment ?