https://cdelmonte.dev/tags/bit-packing/ Recent content in Bit-Packing on cdelmonte.dev Hugo -- 0.147.7 en-us Tue, 09 Jun 2026 00:00:00 +0000 https://cdelmonte.dev/deep-dives/unpacking-parquet-where-explicit-simd-matters/ Tue, 09 Jun 2026 00:00:00 +0000 https://cdelmonte.dev/deep-dives/unpacking-parquet-where-explicit-simd-matters/ On the JVM, optimizing a hot kernel is not only about writing faster code: it is about controlling how much the result depends on the compiler recognizing the code’s shape. Using Parquet bit-unpacking as a concrete case, our experiment shows that a SIMD speedup depends on which scalar baseline C2 is handed, when explicit vectorization is actually justified, and why a more specialized scalar routine is not necessarily faster.