Sinсe Google Chrome was updated to 50.x version, it become impossible to work with DevTools. This issue reproduced mostly in \"Network\" tab. Every time when you click on \"requ
Make devtools snappy again by deactivating all breakpoints:
Go to the Sources tab, show the debugger (may be hidden) and hit Deactivate breakpoints.
Sources
Deactivate breakpoints
(Chrome v62.0 on Windows 10)