Analyzing Vectorized Hash Tables across CPU Architectures
Maximilian Böther,
Lawrence Benson,
Ana Klimovic
et al.
Abstract:Data processing systems often leverage vector instructions to achieve higher performance. When applying vector instructions, an often overlooked data structure is the hash table, even though it is fundamental in data processing systems for operations such as indexing, aggregating, and joining. In this paper, we characterize and evaluate three fundamental vectorized hashing schemes, vectorized linear probing (VLP), vectorized fingerprinting (VFP), and bucket-based comparison (BBC). We implement these hashing sc… Show more
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