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What is a cold start?

A cold start is the delay when a platform must start your code before answering a request.

Last updated November 9, 2026

The short version

A cold start is the delay when a platform must start your code before answering a request. It happens with serverless functions and with free services that sleep after inactivity. The delay may be small or may last up to a minute. Apps that stay running do not have this delay, apart from when they are redeployed.

On EasyHost

EasyHost apps do not sleep when idle. Learn more.

Start for free

Install the skill, choose Global or Local, then tell your agent to deploy. No credit card, no config files.

npx ezhst skill install