Zed

The Svelte Language Server Protocol takes ~1 minute to initialize, causes IDE freezing, and runs out of RAM in some cases. Autocomplete is very slow or non-functional for both markup props and script tags. Affects VS Code, WebStorm, Neovim, and Zed.

Gemini CLI has significant performance issues in standard CLI mode, with long startup times after install/update and 2-second delays between responses. While ACP protocol mode (Zed/Neovim integration) is snappy, the native CLI experience is so poor that developers consider switching to alternatives.