Last modified: 2014-02-19 22:15:41 UTC
Using the Flow\View\History\HistoryRenderer in the board-history action results in 2 network requests per line rendered, one to find out which workflowId a given post is owned by and a second to find out what title that workflowId is owned by, so that it can generate a url for the post.
The WMF core features team tracks this bug on Mingle card https://mingle.corp.wikimedia.org/projects/flow/cards/578, but people from the community are welcome to contribute here and in Gerrit.