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With just those four patches, memory usage went *up* slightly. Add in the 5th patch (which does #2 below), and we get an overall memory drop of 4%. The intermediate result of a memory increase makes sense. While the first four patches reduce the number of (and size of) `DIEValue` allocations, they increase the cost of the `SmallVector` overhead. 0005 (attached) squeezes the abbreviation data

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