Improve performance of path.tail() and path.extension() by not matching with end-anchor $

lua/fzf-lua/core.lua

@@ -155,7 +155,12 @@ end
 M.make_entry_file = function(opts, x)
   local icon, hl
   local ret = {}
-  local file = utils.strip_ansi_coloring(string.match(x, '[^:]*'))
+  local file = x
+  for s in string.gmatch(x, '[^:]+') do
+    file = s
+    break
+  end
+  file = utils.strip_ansi_coloring(file)
   if opts.cwd_only and path.starts_with_separator(file) then
     local cwd = opts.cwd or vim.loop.cwd()
     if not path.is_relative(file, cwd) then

lua/fzf-lua/path.lua

@@ -12,13 +12,21 @@ end
 
 function M.tail(path)
   local os_sep = M.separator()
-  local match_string = '[^' .. os_sep .. ']*$'
+  local match_string = '[^' .. os_sep .. ']+'
 
-  return string.match(path, match_string)
+  local tail = path
+  for s in string.gmatch(path, match_string) do
+      tail = s
+  end
+  return tail
 end
 
 function M.extension(path)
-  return string.match(path, '[%w_+$]*$')
+  local ext = path
+  for s in string.gmatch(path, '[^.]+') do
+      ext = s
+  end
+  return ext
 end
 
 function M.to_matching_str(path)