Very slow kernel startup when browser drive contains large files

## Description

Normally, launching the Pyodide kernel takes a few seconds. After creating ~10 binary files of ~30MB each in the browser drive, when opening a fresh notebook, the Pyodide kernel just keeps on spinning, not getting to launch for minutes upon minutes.

I am using the shared-memory based drive sharing between the Pyodide kernel and the JupyterLite browser drive.

## Reproduce

1. Go to '...'
2. Click on '...'
3. Scroll down to '...'
4. See error '...'

## Expected behavior

## Context

- JupyterLite version: jupyterlite-core~=0.7.0 and jupyterlite-pyodide-kernel~=0.7.0
- Operating System and version: MacOS 26.4.1
- Browser and version: Firefox 149.0.2

Browser Output

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