Zhe I have asked this question twice in the past and experimented with different options. You can read my conclusion, and responses to my question here
https://groups.google.com/d/msg/tiddlywiki/WXr7I6OvTv0/OgyuiAaqBAAJ -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/c58b92e2-4d28-4105-9436-903ce3ce9dffo%40googlegroups.com.