SERVER-15450 Avoid getStats() and keep interval stages as children in NearStage

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• Closed

SERVER-15451 Adaptive initial shell in near query with 2d index

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• Closed

SERVER-15363 Timer use in stages slows down queries

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• Closed

SERVER-15452 Create Performance Parity between 2.6 and 2.8 benchmarks.

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• Closed

SERVER-15455 Search inner covering first for geoWithin query

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• Backlog