Very Low Frame Rate on Ultra-Wide Monitor

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Cursor’s renderer falls significantly behind VS Code at 3440×1440, shows no benefit from the experimental GPU-acceleration flag.

60 Hz / 3440×1440
Cursor: ~54 fps average, drops to ~45 fps on tab switch — visibly below the 60 fps target and clearly stuttery.
VS Code: holds 55-60 fps under identical conditions.

180 Hz / 3440×1440
Cursor: tab-switch dips lower to ~48 fps.
VS Code: staying around 90 fps during tab switches.

60 Hz / 1920×1080
Cursor: immediately stable above 55 fps, proving the choke is per-pixel cost at high resolution, not document complexity or AI features.

BTW: Enabling “experimental GPU acceleration” in either editor produces no measurable gain; hardware is Intel UHD Graphics 730.

Steps to Reproduce

  1. Set monitor refresh rate to the target resolution & frequency (60 Hz or 180 Hz @ 3440×1440; 60 Hz @ 1920×1080).
  2. In Cursor / VS Code open Developer Tools → Rendering → Frame Rendering Stats.
  3. Open the same 500-line file, maximise the window, then record average fps while typing and switching tabs for ~30 s.

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.7.46 (system setup)
VSCode Version: 1.99.3
Commit: b9e5948c1ad20443a5cecba6b84a3c9b99d62580
Date: 2025-10-14T01:21:46.830Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.19045

Does this stop you from using Cursor

Yes - Cursor is unusable

2

Hey, thanks for the detailed report with frame‑rate benchmarks. This is really helpful data showing that Cursor’s rendering performance falls behind VS Code at ultra‑wide resolutions.

I’ve already passed this to the team, since the comparative benchmarks clearly point to a resolution‑dependent issue (it’s fine at 1080p, but drops to 45-54 fps at 3440×1440 versus VS Code’s 55–90 fps).

The team will investigate why Cursor has a higher per‑pixel rendering cost than VS Code at large resolutions.