return {
  provider = function()
    -- stackoverflow, compute human readable file size
    local suffix = { 'b', 'k', 'M', 'G', 'T', 'P', 'E' }
    local fsize = vim.fn.getfsize(vim.api.nvim_buf_get_name(0))
    fsize = (fsize < 0 and 0) or fsize
    if fsize <= 0 then
      return '0' .. suffix[1]
    end
    local i = math.floor((math.log(fsize) / math.log(1024)))
    return string.format('%.2g%s', fsize / math.pow(1024, i), suffix[i])
  end,
}