Rust High-Frequency Quantitative Trading

Jun 18, 2026 · Fundamentals

Can hashbrown Make Quant System HashMaps 5× Faster Than std?

In quant trading systems, hash maps are on the hot path; replacing Rust's default std::collections::HashMap (which uses SipHash) with hashbrown's foldhash can speed up inserts and lookups by up to five times, and the article explains how, why, and when to make the switch.