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“Rustifying” Serverless: Boost AWS Lambda performance with Rust
Discover how to deploy Rust functions using AWS SAM and cargo-lambda. Learn to integrate Rust into Python Lambda functions with PyO3 and maturin. Find out how Rust can optimize Lambda functions, including developing Lambda extensions, without requiring a rewrite of your existing codebase.
- Initially integrating Rust with existing Python Lambdas to avoid a total overhaul.
- Gradually transitioning entire Lambdas to Rust.
- Sharing common behaviors across the Lambda fleet using extensions.
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platform option. Maturin provides a container for compiling the binary on the correct platform, as detailed in their documentation.1
sam build --no-cached
- The runtime API, acting as an interface with the Lambda service, handles tasks like receiving event details and error reporting.
- Your code, which processes event details.
- The Lambda runtime, translating API interactions for your code, invoking your handler for new events, and communicating responses back to the runtime API.
- Runtime implementation
- Handler code
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cargo lambda build --extension --release
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cargo lambda deploy --extension
- Initially integrating Rust with existing Python Lambdas requires less development effort compared to other strategies but has a lesser effect in terms of performance improvement.
- Gradually transitioning entire Lambdas to Rust requires more development effort but has the greatest effect on performance.
- Sharing common behaviors across Lambda extensions provides the ability to improve performance in multiple Lambdas with a single change.