spcl/serverless-benchmarks

Optimize C++ deployments

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#266 opened on Dec 6, 2025

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Description

Currently, we copy all dynamic libraries from dependencies into the final deployment image. This is not optimal - AWS Lambda deployment script uses ldd to recursively find only those shared libraries, that are actually used by the binary. We could apply the same to optimize container size.

The same happens for code packages - we don't need to pack and deploy system libraries, which we know will be available on Lambda; we should only pack our dependencies from /opt/.

For arm64 (#265), we can use an ldd replacement.

Contributor guide

Research direction
Implement ldd based filtering of shared libraries in the deployment script for C++ functions. For ARM64, use cross compile ldd. Also, skip packing system libraries already present on Lambda. Test with a sample C++ deployment.
Tech stack
cpppython
Domain
backenddevopscloud
Issue type
Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitDockerAWS
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55