As a followup to bug 1110277 (see particularly points (2) and (3) in bug 1110277 comment 41), we should see if we can change some aAsyncInsert and/or aAllowLazyConstruction parameters from false to true by replacing them with calls to CreateNeededFrames. (If we get all of the callers, we can potentially remove some or all of the parameters from the functions.) This might allow some batching of frame reconstruction to occur rather than none, and I think it's architecturally a better approach.