Velox

The Vector module provides an Arrow-compatible columnar memory layout with encodings like Flat and Dictionary, enabling efficient data interchange and lazy materialization, as documented in the developer guides.

With a fully vectorized expression evaluation engine, Velox leverages SIMD instructions and optimized encodings to execute expressions efficiently on large datasets, as highlighted in the expression evaluation documentation.

Velox allows developers to define custom types, functions, operators, file formats, and more, enabling deep integration into specialized data systems without reinventing core logic.

It includes sets of vectorized scalar, aggregate, and window functions following Presto and Spark semantics, reducing implementation overhead for common data operations.

Provides primitives for memory arenas, buffer management, spilling, and caching, helping optimize computational resources in complex data pipelines, as detailed in the resource management guides.