ccaominh commented on issue #9278: Speed up joins on indexed tables with string keys URL: https://github.com/apache/druid/pull/9278#issuecomment-579887920 > How do these numbers compare to the standard lookup case? Lookups are about 5x faster: ``` Benchmark (columnCacheSizeBytes) Score Error Units lookupVirtualColumnStringKey 0 3.374 ± 0.065 ms/op lookupVirtualColumnStringKey 16384 3.364 ± 0.054 ms/op lookupVirtualColumnStringKeyWithFilter 0 4.553 ± 0.114 ms/op lookupVirtualColumnStringKeyWithFilter 16384 5.529 ± 0.305 ms/op ```
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