Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for an issue that matches the one I want to file, without success.

Issue Details

• Electron Version:
  • 10.1.3
  • 10.1.4
  • 11.0.0-beta.13
  • 11.0.0-beta.17
  • 11.0.0-beta.19
• Operating System:
  • macOS 11.0 Beta (20A5395g)
  • macOS 11.0.1 Release (20B28)
• Last Known Working Electron version:
  • works on macOS 10.15 Catalina

Expected Behavior

If I call require('child_process').spawn('ls', ['.']), it should return quickly (<10ms).

Measurable with:

const { spawn } = require('child_process');
const start = Date.now();
spawn('ls', ['.']);
console.log(`spawn sync time: ${Date.now() - start}`);

Actual Behavior

If run in a renderer process with nodeIntegration: true, it takes 300+ ms. When used with ffmpeg (our real-world case), we're seeing it go as long as 2-3 seconds, which leads me to think it's related to the binary size/code signing?

To Reproduce

To reproduce the bug, you'll need:

• macOS 11 Beta
• an Apple Developer code-signing certificate

Or you can download the version I code-signed: https://github.com/descriptinc/electron-spawn-perf-bug/releases/tag/1.0.0

Repo: https://github.com/descriptinc/electron-spawn-perf-bug
If you want to build/run it locally:

$ git clone https://github.com/descriptinc/electron-spawn-perf-bug.git
$ yarn install
$ yarn build
$ dist/mac/electron-spawn-bug.app/Contents/MacOS/electron-spawn-bug

Screenshots

Additional Information

I'm not sure if this is an Electron, Electron Builder, or Big Sur bug.