-
Notifications
You must be signed in to change notification settings - Fork 0
⚡ Bolt: [performance improvement] Avoid intermediate buffer allocations in fs reads#44
⚡ Bolt: [performance improvement] Avoid intermediate buffer allocations in fs reads #44vishnu-madhavan-git wants to merge 1 commit into
Conversation
💡 What Replaced usages of `fs.readFileSync(path).toString()` and `fs.readFile(path).toString()` with `fs.readFileSync(path, 'utf8')` and `fs.readFile(path, 'utf8')` across various packages (e.g., `@expo/cli`, `@expo/config-plugins`, `expo-modules-autolinking`). 🎯 Why When reading files in Node.js, calling `.toString()` on the returned `Buffer` allocates an intermediate `Buffer` object before converting it to a V8 string, which adds unnecessary memory allocation and garbage collection overhead. By explicitly providing the `'utf8'` encoding flag to the `fs` methods, Node.js bypasses the intermediate `Buffer` and streams the file contents directly into a V8 string. 📊 Impact Reduces memory allocations and GC overhead when reading text-based source files and configurations during build and development processes. 🔬 Measurement Measure heap memory allocation profiles when performing operations that read many files, such as resolving dependencies in `expo-modules-autolinking` or reading configs in `@expo/cli`. Co-authored-by: vishnu-madhavan-git <237662584+vishnu-madhavan-git@users.noreply.github.com>
👋 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.
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: 018c526f-7280-4cb2-aa03-b2a9a19cfca8
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-fs-read-utf8-1031216766557528880
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.
Comment @coderabbitai help to get the list of available commands and usage tips.
💡 What
Replaced usages of
fs.readFileSync(path).toString()andfs.readFile(path).toString()withfs.readFileSync(path, 'utf8')andfs.readFile(path, 'utf8')across various packages (e.g.,@expo/cli,@expo/config-plugins,expo-modules-autolinking).🎯 Why
When reading files in Node.js, calling
.toString()on the returnedBufferallocates an intermediateBufferobject before converting it to a V8 string, which adds unnecessary memory allocation and garbage collection overhead. By explicitly providing the'utf8'encoding flag to thefsmethods, Node.js bypasses the intermediateBufferand streams the file contents directly into a V8 string.📊 Impact
Reduces memory allocations and GC overhead when reading text-based source files and configurations during build and development processes.
🔬 Measurement
Measure heap memory allocation profiles when performing operations that read many files, such as resolving dependencies in
expo-modules-autolinkingor reading configs in@expo/cli.PR created automatically by Jules for task 1031216766557528880 started by @vishnu-madhavan-git