Huge Command-T slowdown with vim-bufferline installed

[zaript]

Hi.
Pretty much as title says. I am using airline and bufferline with following settings:

let g:airline#extensions#bufferline#enabled = 0
let g:airline_powerline_fonts = 1
let g:bufferline_echo = 1

and Command-T with no settings, which is extremely slow unless I disable bufferline plugin. Not sure how I can investigate deeper into it.

[bling]

check out my https://github.com/bling/minivimrc repository for some mappings that will generate profile logs. if you can provide those it'll help with troubleshooting. thanks.

[daniele-orlando]

Same situation.
vim-bufferline slows down Command-T dramatically.