SMRTR ProgrammingMay 18, 2026Hacker News

Fast xlsx writer in Rust with Python bindings

SMRTR summary

Jetxl is a Rust-powered Python library for writing Excel (XLSX) files up to 47x faster than openpyxl, with near-zero memory overhead via zero-copy Arrow integration. It supports Polars, Pandas, and PyArrow DataFrames and includes rich formatting, charts, conditional formatting, tables, images, and multi-threaded parallel sheet generation — making it a serious upgrade for data-heavy Python workflows.

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