⚡ Bolt: [performance improvement] pass utf8 directly to readFileSync

[vishnu-madhavan-git]

💡 What
Updated multiple instances of fs.readFileSync(...).toString() to fs.readFileSync(..., 'utf8') across @expo/cli, @expo/config-plugins, expo-brownfield, and pod-install.

🎯 Why
By default, fs.readFileSync returns a raw Buffer. Calling .toString() on the buffer allocates memory for the buffer, parses it into a string, returns the string, and leaves the buffer to be garbage-collected. Passing the 'utf8' encoding directly to readFileSync bypasses this intermediate buffer creation, returning the string directly.

📊 Impact
Reduces unnecessary memory allocations and slightly improves execution speed when reading files during CLI and plugin operations.

🔬 Measurement
Ran the full test suite and lint checks for the modified packages to ensure no regressions in file reading behavior. All tests passed.

---

PR created automatically by Jules for task 6460923648889085148 started by @vishnu-madhavan-git

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
v1-nexlyn	Ready	Preview, Comment	Apr 28, 2026 8:34am

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e99e334f-6fc7-4822-92df-827713c9e6aa

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bolt-perf-readfilesync-utf8-6460923648889085148

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}