Can't stop Visual Studio 2015 lagging for seconds in JS files saying "JavaScript language service is processing your request in the background..."?

Question

In the status-bar when I am typing in a Js file it shows this message on keyup and editor hangs for 2 or 3 seconds. This probably started happening suddenly When I moved some Js files into category folders but I am not sure this is the cause. I dont know what is the problem. Before the problem all js files were in a same folder like angular files and my own app files.
I also tried uninstalling the WebCompiler extension and resetting the visual studio from Import & Export Settings and hard resetting through devenv /ResetSettings command.

I have also applied this answer : Visual Studio 2015 JavaScript Language Service stuck in an infinite loop of downloading non-existing referenced files

Answer 1

I stopped the lagging by editing _references.js and setting autosync enabled="false" and removing a ton of 3rd-party (angular, ionic) library files from the listed references.

<autosync enabled="false" />

to the top of _references.js file

Answer 2

If previous answer is not clear enough or tl;dr

add

/// <autosync enabled="false" />

to the top of _references.js file