---
id: 'functions-limits'
title: 'Limits'
description: "Limits applied Edge Functions in Supabase's hosted platform."
subtitle: "Limits applied Edge Functions in Supabase's hosted platform."
---

## Runtime limits

- Maximum Memory: 256MB
- Maximum Duration (Wall clock limit): 400s (this is the duration an Edge Function worker will stay active. During this period, a worker can serve multiple requests)
- Maximum CPU Time: 2s
- Request idle timeout: 150s (if an Edge Function doesn't send a response before the timeout, 504 Gateway Timeout will be returned)
- Maximum Function Size (after bundling via CLI): 10MB
- Maximum log message length: 10,000 characters
- Log event threshold: 100 events per 10 seconds

## Other limits & restrictions

- Outgoing connections to ports `25` and `587` are not allowed.
- Serving of HTML content is only supported with [custom domains](/docs/reference/cli/supabase-domains) (Otherwise `GET` requests that return `text/html` will be rewritten to `text/plain`).
- Deno and Node file system APIs are not available.
- Web Worker API (or Node `vm` API) are not available.
- Node Libraries that require multithreading are not supported. Examples: [libvips](https://github.com/libvips/libvips), [sharp](https://github.com/lovell/sharp).