Changing a delay time of "Autoscroll from source"

I use IntelliJ IDEA 12.1.6 on Windows 7.

I noticed the feature "Auto scroll from source" and I use it.

It works fine, but I feel dissatisfied that a delay time of it is too long.

I hope autoscroll would be invoked immediately after I changed a viewing file in tabs.

But in actually, it seems to be invoked after a little delay time.

I want to make it to zero or next to zero time.

Is there a way to change this delay time?