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Custom buffer font - Massive rendering lag #45496

@MihaelBercic

Description

@MihaelBercic

Reproduction steps

Settings: "buffer_font_family": "Google Sans Code",
I've tried:

  • Monaspace (githubs) fonts
  • Google sans code

Both perform surprisingly bad on the latest Zed version.
I'm not sure if i didn't notice it before, but this time the rendering is extremely slow and lagging.

Current vs. Expected behavior

Rendering should be smooth (like the default fonts or JetBrains Mono).

Zed version and system specs

Zed: v0.217.3+stable.105.80433cb239e868271457ac376673a5f75bc4adb1 (Zed)
OS: macOS 26.2
Memory: 64 GiB
Architecture: aarch64

Attach Zed log file

Zed.log

Relevant Zed settings

settings.json
"buffer_font_family": "Monaspace Krypton Var",

Relevant Keymap

keymap.json

(for AI issues) Model provider details

No response

If you are using WSL on Windows, what flavor of Linux are you using?

None

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    area:performanceFeedback for performance issues, speed, memory usage, etcarea:ui/minimapFeedback for the editor minimapfrequency:uncommonBugs that happen for a small subset of users, special configurations, rare circumstances, etcpriority:P3Papercuts, minor issues with a clear workaround, cosmetic bugsstate:reproducibleVerified steps to reproduce included and someone on the team managed to reproduce

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