Alex Merced • 4/13/2026

What is Apache Arrow? Erasing the Serialization Tax

This article discusses the performance bottleneck caused by serialization and deserialization when moving data between analytical systems, known as the 'serialization tax.' It introduces Apache Arrow as an open-source, language-agnostic, in-memory columnar format that standardizes data layout in RAM, enabling zero-copy sharing and SIMD acceleration. The article contrasts Arrow with Apache Parquet (disk storage) and explains how it improves data workflows for tools like Python, Java, and Spark. It is part of a series on open-source lakehouse technologies.

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#serialization #Apache Arrow #Zero Copy