User reports that it happens in WebRender, but not if he turns WebRender off. Looking at the profile when memory usage spikes, we spend a lot of time inside update_texture_cache, so there might be some suspicious churn going on there.
Bug 1697361 Comment 9 Edit History
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User reports that it happens in WebRender, but not if he turns WebRender off. Looking at the profile in comment 7, when memory usage spikes, we spend a lot of time inside update_texture_cache, so there might be some suspicious churn going on there.