[Bug]: ThemeProvider memory leak while using on page using SSR

[mahish]

Library

React / v8 (@fluentui/react)

System Info

System:
    OS: macOS 14.6.1
    CPU: (8) arm64 Apple M1 Pro
    Memory: 1.06 GB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Browsers:
    Chrome: 128.0.6613.86
    Safari: 17.6

Are you reporting an Accessibility issue?

None

Reproduction

https://stackblitz.com/edit/stackblitz-starters-w5tjge?file=README.md

Bug Description

Actual Behavior

Each server request increases memory usage of useThemeProviderClasses without freeing it.

The following screenshot was taken while running the same sample without <ThemeProvider>:

The first snapshot was taken after fresh server start. The other ones after load test of 25 requests per second for ~50s. Garbage collector triggered before each snapshot.

I followed this guide https://alberic.trancart.net/2020/05/how-fixed-first-memory-leak-nextjs-nodejs/

Expected Behavior

The memory after triggering garbage collector should stay circa the same

Logs

No response

Requested priority

High

Products/sites affected

No response

Are you willing to submit a PR to fix?

no

Validations

• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• The provided reproduction is a minimal reproducible example of the bug.

[mahish]

I updated the original post with better screenshot to support the case and some info about my debugging process.