[BUG - Desktop] High iGPU load 50% or more during task execution. #31664

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1. github-actions

   assigned

   Brendonovich

   on Jun 10, 2026
2. github-actions

   added

   needs:complianceThis means the issue will auto-close after 2 hours.This means the issue will auto-close after 2 hours.

   and removed

   needs:complianceThis means the issue will auto-close after 2 hours.This means the issue will auto-close after 2 hours.

   on Jun 10, 2026
3. github-actions commented on Jun 10, 2026

   

   github-actionsBot

   on Jun 10, 2026 – with GitHub Actions

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   Thank you for updating the issue! It now meets our contributing guidelines. We appreciate the detailed description, steps to reproduce, and the hardware/system information. We'll look into the high iGPU load caused by the UI animations.
4. brandon-julio-t commented on Aug 6, 2026

   

   brandon-julio-t

   on Aug 6, 2026

   Contributor

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   Confirmed on macOS (M1 Pro, 16GB): forcing prefers-reduced-motion: reduce drops GPU usage to near-zero immediately.

   Repro: OpenCode Desktop with active sessions → DevTools → Rendering tab → "Emulate CSS media feature prefers-reduced-motion: reduce".

   Before/after (btop + Activity Monitor, same sessions running):

   • GPU total: 61% → 5%, instantly after toggling
   • OpenCode Helper CPU: 36.7% → 9.9%
   • OpenCode Helper GPU (Activity Monitor): ~13% while working

   This confirms the animations described in this issue account for essentially the entire GPU cost, and that the mitigation already works behind the prefers-reduced-motion media query — it just needs a persistent setting (or honoring the OS-level Reduce Motion, which the DevTools emulation proves works).

   Baseline (Activity Monitor, OpenCode Helper at 13.3% GPU):

   

   Before (btop, GPU 61%, OpenCode Helper 36.7% CPU):

   

   DevTools setting applied:

   

   After (btop, GPU 5%, OpenCode Helper ~10% CPU):

   
5. opp4s commented on Sep 4, 2026

   

   opp4s

   on Sep 4, 2026

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   Reproduced on macOS — v1.18.28

   Same issue confirmed on macOS (Apple Silicon, 8GB RAM).

   Process breakdown (idle state, no tasks running):

   Process	CPU	RAM
   GPU Process	20-27%	1.2GB
   Renderer	23-34%	3.4GB
   Node Service	64%	4.5GB
   Total	113%+	—

   Key observations:

   1. GPU Process runs at 20-27% CPU even when completely idle — no tasks executing, no animations visible
   2. After restart, the GPU process immediately jumps to 25%+ and stays there
   3. Attempted all standard Electron GPU flags (--disable-gpu, --disable-gpu-compositing, --use-gl=swiftshader, env vars) — none are respected by the app
   4. The electron-flags.conf file in the app support directory is ignored
   5. Updating from v1.18.16 to v1.18.28 did not fix the issue
   6. Renicing the GPU process to +15 has no effect on actual CPU consumption

   Impact:

   • Battery drains rapidly (~30% faster than normal)
   • System memory pressure increases (swap activity)
   • WindowServer elevated due to constant GPU repaint requests

   Environment:

   • macOS (Apple Silicon)
   • 8GB RAM
   • OpenCode v1.18.28
   • Electron 42.3.3

   This issue persists across restarts and version updates. The GPU process appears to be in a continuous rendering loop even when the UI is idle.
6. thdxr commented on Oct 11, 2026

   

   thdxr

   on Oct 11, 2026

   Member

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   Thanks for the report! OpenCode 2.0 is now out and development is focused on V2, so we're closing issues filed against OpenCode 1. Please upgrade (opencode upgrade --major, details: https://anoma.ly/notes/opencode-2-0), and if this is still relevant on 2.0, reopen this issue or open a new one with your 2.0 version.

   — from 𝕺𝖕𝖊𝖓𝕮𝖔𝖉𝖊
7. thdxr

   closed this as not plannedon Oct 11, 2026