very slow motion when use foldexpr and same buffer in multiple window

[SolaWing]

reproduce step:

1. in nvim 5.0 head
2. use nvim-treesitter,
3. foldmethod=expr, foldexpr=nvim_treesitter#foldexpr()
4. edit a file, split it, so the buffer visible in multiple window
5. trigger a easymotion, like line jump jk.
6. jump is very slow, will consume several seconds..

profile.txt