Repeating typing with `.` is extremely slow.

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What happened:

Typing a bunch of stuff, exiting insert mode, perform a motion, then press . to repeat typing. The previously typed characters will be inserted one at a time. If you typed a whole word or two, it can take up to a second to repeat the typing action.

What did you expect to happen:

It should instantaneously insert all of the typed characters in one go.

How to reproduce it:

1. Open a new file and insert several blank lines.
2. Go to the first blank line, type i to enter insert mode, and type random giberish on that line.
3. Press esc to exit insert mode.
4. Press j to go to the next line.
5. Press . to repeat the typing from step 2.

Notice how long it takes for the gibberish insert to be reproduced.

You may repeat steps 4 and 5 for as many blank lines as you have to experience the issue again.

Depending on timing factors, you may also notice that about halfway through the insertion, the auto-completion dropdown momentarily appears, indicating that this assert is not being performed atomically.

Reproduce the issue using the numbered VSCodeVim steps: repeat inserted text with . across blank lines and observe the delay and autocomplete dropdown. Trace the repeat-insertion path and verify that the full text is inserted atomically and instantaneously, without triggering the dropdown midway.