profile: https://share.firefox.dev/3XfPit8 The marker chart is extremely busy. Not sure which markers are the root causes & which are just symptoms, but one possible clue: the "DOMEvent" track seems to show that we're alternating between an `underflow` event and then an `overflow` event (over and over). Perhaps we're responding to one in some way, to avoid {under/over}-flowing, and we end up overshooting and triggering the other bad-condition?
Bug 1914831 Comment 2 Edit History
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profile: https://share.firefox.dev/3XfPit8 The marker chart is extremely busy. Not sure which markers are the root causes & which are just symptoms, but one possible clue: the "DOMEvent" track seems to show that we're alternating between an `underflow` event and then an `overflow` event (over and over). Perhaps we're responding to one in some way, to avoid {under/over}-flowing, and we end up overshooting and triggering the other one, and we respond to that, and this repeats forever?