Sephral’s Performance Doctor

Sephral’s Performance Doctor

by Sephral

Claimed by sephral
v1.0.4
Updated Nov 5, 2026
Install
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Description

Sephral’s Performance Doctor

Five frames per second on a strong computer? A map that never finishes loading for one player? Performance Doctor finds out why Foundry is slow, explains it in plain words and fixes it with you, step by step.

Highlights

  • Knows the usual suspects: a browser that draws without the graphics card, a scaled screen, quality set too high, a laptop on battery, the browser's energy saver. It names the cause and shows the way out for your browser.
  • Make my game faster: ten seconds of measuring, the settings that help most with one click, a second measurement that shows the difference. Everything can be undone.
  • Graphics test: switches lighting, animations, weather, videos and module effects off for a moment each and shows what costs the most on your computer.
  • Which module eats the time: measures every module, the system and Foundry for 15 seconds, and the next start of Foundry too. With Sephral’s Module Loadouts the GM switches the expensive ones off for a test and back on with one click.
  • Heavy scenes: the GM sees how many megabytes a scene sends to every player and how long the slowest player waits. A huge map becomes a small WebP copy with one click, and the original stays.
  • The whole table at a glance: frame rate, delay, download speed and graphics chip of every player, a warning when someone still waits for a scene, and a button that asks a player to check.
  • The world: what every player downloads when joining, the largest documents, images hidden inside journals, an oversized chat log.

How it works

  1. Enable the module.
  2. Click the stethoscope in the token controls or next to the frame rate in the players list.
  3. Follow the hints. Players fix their own computer, the GM gets what only the GM can change.

Good to know

The doctor watches quietly and costs no noticeable time. When a game stays very slow, it offers its help on its own, once per session.

Install

Performance Doctor is not in Foundry's module search. Copy this link:

https://github.com/Sephral/sephrals-performance-doctor/releases/latest/download/module.json
  1. In Foundry's setup screen open Add-on Modules and click Install Module.
  2. Paste the link into Manifest URL at the bottom of the window.
  3. Click Install, then enable the module in your world.

On The Forge open the Bazaar, click Install From Manifest and paste the link.

How to install a module by its link

Foundry VTT 13 and 14 · any game system · English and German

Learn more

What the doctor measures, how it finds the causes and every setting are explained in the manual. Questions or ideas? Join us on Discord. Looking for more? See all modules by Sephral.

License

See LICENSE.md.

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