Changelog

In recent weeks, we've gradually rolled out a number of build optimizations for Render's Python native runtime, including:

• Tuning chunk size and parallelism for build image uploads
• On-disk caching of commonly used Python versions
• Sharing universal layers across build images

Together, these optimizations have reduced median build time for Python services by 27%:

Before these optimizations (week of March 16), median build time was 76 seconds, consistent with prior weeks. After all optimizations landed (week of April 13), it dropped to 55 seconds (a conservative 27% reduction). Build times in the weeks since have remained in this range.