feat: use ahash for better hash performance

risinglightdb / risinglight

An educational OLAP database system.

Apache License 2.0

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feat: use ahash for better hash performance #839

Closed xiaguan closed 5 months ago

xiaguan commented 5 months ago

For tpch 10GB 's Q6 , 1:11 -> 1:05

xiaguan commented 5 months ago

std::collections::HashMap provides strong guarantees regarding DOS (Denial of Service) resistance, while ahash prioritizes performance over such guarantees.