Lots of 'event already in timeline' warnings

[ara4n]

My JS console is filling up with warnings like:

room.js:491 Event $1456621160155193ZZdAy:matrix.org already in timeline [object Object]

Seems to happen particularly when i have RoomSettings open in a small window that such that the settings hide the view of the timeline itself.

[ara4n]

This also seems to happen whenever we get a spinner stuck at the top or bottom of the page for whatever reason - particularly common that new rooms with little scrollback get a spinner stuck at the top.

[richvdh]

they aren't warnings; if anything, they are debug.

If we're making the same pagination requests over and over, that's a separate problem.

[ara4n]

right - the thing i was worried about here is the fact that they tightloop chewing 100% CPU. Seems to happen on RoomViews with limited height.

[richvdh]

@ara4n: I was unclear on the repro conditions for this, but hopefully it's been fixed by matrix-org/matrix-js-sdk#91. Could you see if it still happens?

[ara4n]

haven't seen it so much since, and can't repro now - the most i've seen are a 3 or 4 in a row every now and then.