# Replit — Shell2: 200× faster, persisted, multiplayer-native Shells

- Company: Replit (replit.com)
- Announced: 2024-10-11T23:55:14+00:00
- Category: capability-change
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://replit.com/blog/shell2
- Record: https://forck.live/items/17882-shell2-200-faster-persisted-multiplayer-native-shells
- Subject: Replit Agent

Replit introduced Shell2, a new shell backend that is approximately 200 times faster than the previous implementation, with persistent and multiplayer-native shells. The performance improvement comes from technical changes such as eliminating string-byte conversions, avoiding stdio, and reducing protocol introspection. The new system also enables shells to be shared and persisted across users in a multiplayer environment.

## Evidence

Verbatim from https://replit.com/blog/shell2:

> As a rough proxy, the old shell took around 67 seconds to print out Shakespeare's complete works whereas now it takes ~0.34s instead!

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