[Tags] Fall back to --algo=v1 if tags file is too large (> 200MB)

autoload/fzf/vim.vim

@@ -773,9 +773,10 @@ function! fzf#vim#tags(query, ...)
   let tagfile = tagfiles()[0]
   " We don't want to apply --ansi option when tags file is large as it makes
   " processing much slower.
-  if getfsize(tagfile) > 1024 * 1024 * 20
+  let tagsize = getfsize(tagfile)
+  if tagsize > 1024 * 1024 * 20
     let proc = 'grep -av ''^\!'' '
-    let copt = ''
+    let copt = tagsize > 1024 * 1024 * 200 ? '--algo=v1 ' : ''
   else
     let proc = 'perl -ne ''unless (/^\!/) { s/^(.*?)\t(.*?)\t/'.s:yellow('\1', 'Function').'\t'.s:blue('\2', 'String').'\t/; print }'' '
     let copt = '--ansi '