TECHNICAL BLOG

Fast CSV parsing

Max Henger | 18th of January, 2026

In many of our projects we are processing large amounts of data for our clients. Both on servers, and their and our machines. This data is often supplied in CSV format, where we have to process hundreds of CSV files measuring around 50 MiB in size. After profiling our applications we saw that we were spending a significant amount of time parsing CSVs, and decided to optimize our loading routine. We thought it would be interested to share our findings.