High CPU from Kite, Spyder lags when typing

Problem Description

User quickly types requests.post() on keyboard, but on screen chars show up one by one (see many calls in terminal, kite engine is >100%).

What steps reproduce the problem?

1. While in debug mode
2. Types requests.post() really quickly
3. See video: https://www.dropbox.com/s/ux28c7o5r6oieis/kite_lag_spyder_requests_.mov?dl=0

What is the expected output? What do you see instead?

Keystrokes should match typing speed.

Paste Traceback/Error Below (if applicable)

Versions

• Spyder version: latest Spyder beta
• Python version:
• Qt version:
• PyQt version:
• Operating System name/version:

[CAM-Gerlach]

This may not have anything to do with Kite; I noticed this lag too in beta 5 (the latest Spyder beta at the time this was posted that @plungg appears to ambiguously be referring to), and I have never had Kite installed nor do I have any interest in ever doing so. It seemed to be a result of regular on-the-fly completion; with the changes that were implemented as a result of #10134 to add an idle and character delay as well as not try to complete in inappropriate places, the lag has all but vanished for me in dev builds and beta 6 and the UX is way better.

[ccordoba12]

Ok, I think @andfoy added some lockers to avoid interference with the LSP, but this could be solved after making Kite to take over the LSP instead.