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This reduces memory usage because we only need one allocation instead of two for the dynamic atom and its chars, and because we don't need to store a refcount and a size. It precludes sharing of chars between dynamic atoms, but we weren't benefiting much from that anyway. This reduces per-process memory usage by up to several hundred KiB on my Linux64 box. One consequence of this change is that we need to allocate + copy in DOMString::SetKnownLiveAtom(), which could make some things slower. --HG-- extra : rebase_source : ba4065ea31e509dd985c003614199f73def0596c |
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