⚡ Bolt: [performance improvement] Avoid intermediate buffer in fs.readFileSync calls

[vishnu-madhavan-git]

💡 What:
Replaced instances of fs.readFileSync(path).toString() with fs.readFileSync(path, 'utf8') across several files in the @expo/cli, @expo/config-plugins, and @expo/prebuild-config packages. Additionally, cleaned up unnecessary .toString() calls where 'utf8' was already passed.

🎯 Why:
This is a standard Node.js micro-optimization. By passing the encoding string directly to fs.readFileSync, Node.js bypasses the allocation of an intermediate memory Buffer object and decodes the stream directly to a string. This reduces garbage collection (GC) pressure and provides minor improvements in execution speed and memory efficiency without sacrificing code readability.

📊 Impact:

• Minor reduction in memory allocation during file reads.
• Marginally faster synchronous file I/O operations.

🔬 Measurement:

• Inspect the targeted codebase files to confirm fs.readFileSync now passes the encoding option directly instead of chaining .toString().
• Verified safety via successful test suites in the affected packages.

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PR created automatically by Jules for task 16859852880905722925 started by @vishnu-madhavan-git

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Project	Deployment	Actions	Updated (UTC)
nexlyn	Error		Apr 11, 2026 8:25am

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