Helix buffer becomes unresponsive/slow on paste operation

[matthias-kuklinski]

Reproduction steps

Copying the content of README.md from my system's clipboard into a helix buffer through CTRL+SHIFT+V results in the following:

Issues:

1. The content is (visually) inserted line by line. As a result pasting larger content results in a slow and unresponsive operation, as any input by the user seems to be ignored until the content is fully pasted into the helix buffer.
2. User action is required as can be seen in the asciinema-clip: on line 37 and 73 I had to press a key in order to let helix proceed. I pressed the ESC key. I tried pressing other keys, such as j, which were literally appended to the pasted content.

Environment

• Platform: Sway (Wayland) on Arch Linux
• Helix version: helix v0.6.0
• Helix log: empty

[kirawi]

Duplicate of #1021

[kirawi]

I'm guessing you're pasting in insert mode via ctrl-v instead of space-p in normal mode. We currently don't have bracketed paste support because crossterm doesn't support it yet (crossterm-rs/crossterm#557), so without that pressing ctrl-v literally works as if you typed out the pasted text character by character.

Originally posted by @archseer in #1021 (comment)