Preview lags for large files

[kapral18]

Both grep and fd previews choke on big text files sometimes taking 5 to 15 seconds to unfreeze in the picker preview.
While with vanilla fzf it's still choking but much more responsive so I was wondering how does the preview work do you use your own preview with treesitter or do you use the fzf vanilla preview coloring?

What is the best practice to speed previews up for large files bigger than 500kb for example giant .map or .json files, Given that I don't want to fully hide them I still want to be able to find the text in the preview with rg or see the output with fd?

Thanks

my config https://github.com/kapral18/config.nvim/blob/7f87d49990a0a3034da365c550f8a574a7d33f22/lua/plugins/fzf.lua

my fzf config:

# FZF
set FD_OPTIONS "--hidden --follow"
set -gx FZF_DEFAULT_OPTS "--no-mouse --height 80% --reverse --multi --info=inline --preview='bat {} --color always' --preview-window='right:60%:wrap' --bind=ctrl-d:half-page-down,ctrl-u:half-page-up,ctrl-b:page-up,ctrl-f:page-down"
set -gx FZF_DEFAULT_COMMAND "git ls-files --cached --others --exclude-standard 2>/dev/null || fd --type f --type l $FD_OPTIONS"
set -gx FZF_CTRL_T_COMMAND "$FZF_DEFAULT_COMMAND"
set -gx FZF_ALT_C_COMMAND "fd --type d $FD_OPTIONS"

alias fzfi='git ls-files --cached --others --exclude-standard 2>/dev/null || fd --type f --type l $FD_OPTIONS'

[kapral18]

I confused the repos :D