On 31 March 2013 22:57, rocdaddy <[email protected]> wrote: > Hey folks: > > In a rails app I'm building, the home page will have two forms: one to > sign-up for an account, another one to sign-in to an existing account. > > Now, if I were to use object form helpers to build these forms, the > controller for the homepage would need to create instances of the relevant > models each time someone visits the homepage. > > This concerns me a bit, because a visitor to the home page may or may not > end up using either the sign-up or sign-in forms. For instance, they may > instead click a link that gives a "tour" of the app. If they do so, will > the instance variables created by the controller in anticipation of the > POTENTIAL use of the forms be garbage-collected?
The use of the objects is only for building the view, once the view is rendered those objects are not used again. Remember when you post a form it is not the model object that is posted, only the contents of the fields as strings. Therefore it does not make any difference to the objects whether the form is posted or not, they will be garbage collected after the view is created in the same way whether the form is used or not. > > I'm just thinking about efficiency here -- don't want to have a bunch of > extra instance variables taking up space in the runtime memory just for the > sake of the (slight) convenience of using model object forms helpers rather > than plain-vanilla form handlers. Don't worry about efficiency until it becomes an issue. A long career in s/w development has shown me that the bottlenecks in an app are never where you expect them to be so optimising before you know where the critical parts are is a waste of time. Spend the time instead on ensuring full test coverage so that if you do need to optimise (which is unlikely) you can refactor the code without worrying about whether you have messed something up. Colin -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
