There have been some performance regressions in history display, we're working on this actively:

On Mon, Mar 25, 2013 at 5:06 PM, Langhorst, Brad <Langhorst@neb.com> wrote:

Is it my imagination or has the history panel become much slower in the latest release?

Maybe I have something misconfigured?

--
James Taylor, Assistant Professor, Biology/CS, Emory University