Tpcds on Q's tech noteshttps://qlong.github.io/tags/tpcds/Recent content in Tpcds on Q's tech notesHugoen-usQiegang LongMon, 27 Jul 2026 00:00:00 +0000Variant Benchmark: Open-Sourced, Two Spark Optimizer Fixes, and a ~4x TPC-DS Speeduphttps://qlong.github.io/posts/2026-07-27-variant-benchmark-open-source-and-spark-fixes/Mon, 27 Jul 2026 00:00:00 +0000https://qlong.github.io/posts/2026-07-27-variant-benchmark-open-source-and-spark-fixes/We open-sourced variant-conformance-benchmark, used it to surface two Spark optimizer problems, and measured a ~4x TPC-DS speedup after the fixes — Variant finally beats string JSON on analytical queries.