b2ca19484a
This replaces that data structure that we use to resolve bucket ids in bucketing aggs that are inside other bucketing aggs. This replaces the "legoed together" data structure with a purpose built `LongLongHash` with semantics similar to `LongHash`, except that it has two `long`s as keys instead of one. The microbenchmarks show a fairly substantial performance gain on the hot path, around 30%. Rally's higher level benchmarks show anywhere from 0 to 7% speed improvements. Not as much as I'd hoped, but nothing to sneeze at. And, after all, we all allocating slightly less data per owningBucketOrd, which is always nice. |
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