[Feature Request] ARM64/Graviton support for extra PHP extensions #622
Description
Summary
Currently, bref/extra-php-extensions only provides x86_64 Lambda layers. With AWS Graviton (ARM64) processors offering better price/performance ratio for Lambda functions, it would be valuable to have ARM64 support for extra extensions.
Use Case
We're migrating our PHP Lambda applications to ARM64 architecture to benefit from:
- ~20% better price/performance compared to x86_64
- Lower cold start times
- Reduced costs
However, we're blocked on applications that require extensions like GD, Imagick, or others from this package. These applications must remain on x86_64 because the extra extensions don't have ARM64 layers.
Affected Extensions (our use case)
gd- Required for image manipulation (crop, resize, encode) and PDF generation via mPDFexcimer- Performance profiling
Other users likely need ARM64 support for additional extensions as well.
Current Workaround
We're forced to keep applications requiring these extensions on x86_64, missing out on Graviton benefits.
Proposal
Add ARM64 builds alongside x86_64 for extra PHP extensions, similar to how the base Bref runtimes already support both architectures via bref/arm-php-* images.
Environment
- Bref version: 2.x
- PHP version: 8.4
- AWS Lambda architecture: arm64 (desired)
Related
- Bref base runtimes already support ARM64:
bref/arm-php-84-fpm, etc. - README currently states: "ARM64 is not supported yet with Bref v2"
Would love to see this feature or contribute if there's guidance on the approach. Is there a technical blocker or is this mainly a matter of build infrastructure updates?