🤖 Optimize setup-cmux action with node_modules caching #424
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_Generated with `cmux`_ Add node_modules directory caching to drastically reduce install times when the lockfile hasn't changed. This caches the entire node_modules folder in addition to bun's install cache, eliminating the need to reinstall packages on every CI run. Expected impact: Reduce bun install time from 5-7s to <1s when cache hits.
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Include Bun version and runner architecture in cache key to ensure node_modules cache is invalidated when the Bun runtime changes. This prevents native module ABI mismatches that could cause subtle failures.
ammario
approved these changes
Oct 26, 2025
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Generated with
cmuxAdd
node_modulesdirectory caching to the setup-cmux action to dramatically reduce install times when the lockfile hasn't changed.Changes
node_modulescache before bun install cachebun.lockhash as key for invalidationbun-tobun-cache-for clarityExpected Impact
Before: Every CI run executes
bun install, taking 5-7 seconds even with bun's native cachingAfter: When
bun.lockis unchanged, cache hit allows skipping full dependency installation, reducing to <1 secondWhy This Works
node_modulescache: Restores the full dependency treeThis is especially beneficial for integration tests which run frequently during development.