I have been using Google Chrome\'s dev tool kit (element inspection, stack trace, javascript debugging, etc.) for some time with great success.
However, about two weeks
My transpiled file including source map is about 5MB. I have tried all of the solutions in this post and have only seen marginal improvement. I eventually gave up and uninstalled and reinstalled Chrome. Wish I did that right away, my source map load in the debugger went from about 15 seconds to 3.
My solution was to just delete a batch of projects that were running locally on my computer and were connected to IIS. Just removed folders/projects i don't use a lot or anymore. removed 25GB of data and now my dev toolbar works like charm!
This was solved by clearing my cache (temp files, cookies, etc) in Chrome. Not sure what the root cause was, but that fixed the problem.
I've had the same problem, tried the same solutions without luck, until I fired procmon and saw that Chrome was actually reading my entire Projects folder (which is several hundred thousand files worth).
There was a reference to that folder in the Workspace/Folders section in the dev tools Settings app. Removing the reference solved the problem.