Question

I use a config object to store configuration information. So something like this example:

var value = myObject.Get('name');

The actual config is stored in an array – ie config['name'] = value

There are a lot of calls to the Get() function – over 25,000. How significant would the difference be if that array was accessed directly instead of via he Get() call?

Also – in an animation that 25,000 could be done 60 times per second (!)

Answer 1

The direct access should be faster, but you should do some tests, because the code performance is often influenced by the js engine.

For example, it’s about 50% faster to access an object’s key through the dot synthax (obj.key) than the asociative array like one (obj["key"]) in chrome, while in firefox it’s the other way around.
I recommend you don’t do micro-optimisations before you end your project and only after you do some testing/research.