Heroku has increased the default maximum compressed slug size from 500MB to 1GB, and also raised build compile timeouts. These changes are aimed at reducing deployment friction for applications with large dependencies, particularly AI and machine learning libraries. Larger slugs do come with a trade-off: slower dyno boot times due to longer download and extraction, so keeping slugs lean is still recommended.
Table of contents
Understanding app slugs and deploymentIncreased build compile timeouts for complex appsRemoving deployment friction for developers556 Impressions