---
title: "What is warm start?"
description: "A warm start begins work in an environment where dependencies are installed and caches are populated, so the first command you run is the one you care about."
url: "https://www.promigence.ai/glossary/warm-start"
site: "Promigence"
---

# What is warm start?

A warm start begins work in an environment where dependencies are installed and caches are populated, so the first command you run is the one you care about.

The industry benchmarks cold start because it is easy to measure and easy to market. It is also converging, with a floor of tens of milliseconds.

The warm path still differs by an order of magnitude. A typecheck that takes 24.35 s cold takes 1.55 s warm; another goes from 101.4 s to about 1.5 s. Across a twenty-cycle agent task that is 527 s against 71 s for identical work.

## Related
- https://www.promigence.ai/glossary/snapshot-fork
- https://www.promigence.ai/glossary/episode