# Webgl Rendering Much Slower on Desktop than Mac Pro

**URL:** https://discourse.processing.org/t/webgl-rendering-much-slower-on-desktop-than-mac-pro/23339
**Category:** p5.js
**Created:** [August 18, 2020, 5:01pm UTC](https://discourse.processing.org/t/webgl-rendering-much-slower-on-desktop-than-mac-pro/23339 "2020-08-18T17:01:55Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![sgebrial](https://avatars.discourse-cdn.com/v4/letter/s/6f9a4e/32.png) [@sgebrial](https://discourse.processing.org/u/sgebrial)
#### Post date: [August 18, 2020, 5:01pm UTC](https://discourse.processing.org/t/webgl-rendering-much-slower-on-desktop-than-mac-pro/23339/1 "2020-08-18T17:01:55Z")

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I’m working on an n-body simulation and drawing hundreds of small spheres to the screen. On my mac pro I can draw about a thousand smoothly but on my desktop with a gtx 1080 it very jittery (~5fps). Anyone know how I can diagnose/fix this issue?

I think it might be having an issue with deciding between the built-in intel graphics vs the graphics card. The issue occurs on both chrome and firefox on desktop.