> it's hard to be much faster than kdb: 10 billion rows completes in 70msec on k... | Hacker News

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dozzie on Nov 11, 2017 | parent | context | favorite | on: How should you build a high-performance column sto...

> it's hard to be much faster than kdb: 10 billion rows completes in 70msec on kdb, but Hadoop takes something like 30 seconds.

Indeed, it's hard for exhaustive search beat index lookup.

geocar on Nov 12, 2017 [–]

> it's hard for exhaustive search beat index lookup.

kdb isn't using any indexes for this query.

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