[Webkit-unassigned] [Bug 70623] Ensure CCLayerTreeHost actually frees textures when hidden

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=70623





--- Comment #6 from Iain Merrick <husky at google.com>  2011-10-24 05:44:31 PST ---
After some further experiments:

- We don't reduce down to 3MB unless the window is fairly small, because the root layer tiles are protected.

- The total size of the protected tiles varies, but not due to additional drawing as I thought, it's just because the number of visible tiles changes depending on the current scroll position. It's fairly common for ~10MB to be protected.

So it's actually working as intended. The 3MB limit doesn't seem particularly effective, though. Maybe we should increase that limit, but remove the special protection for root tiles?

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