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- Reduce test matrix: skip Python 3.11, use reduced matrix for PRs - Exclude benchmark tests from regular CI (run in dedicated job) - Add cache restore-keys for better cache hit rates - Reduce flaky test reruns from 3 to 1 - Switch macOS to faster ARM runners (macos-latest) - Update SDK download for ARM architecture support
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Add test_env_template config option that allows create_env to clone from a pre-existing template environment instead of creating from scratch. This provides ~38% speedup for test builds where the template contains all required packages. Cross-platform support: - macOS (APFS): uses cp -c for copy-on-write (~1.8s) - Linux: uses cp --reflink=auto for reflinks on btrfs/xfs - Windows: uses shutil.copytree (~2.5s) Also adds warm_package_cache pytest fixture that creates a session-scoped template environment with Python, pip, setuptools, and expat.
- Update package versions in test recipes to versions available on osx-arm64: - xz: 5.2.3 → 5.4.2 (30_top_level_finalized) - openssl: 1.0.2 → 3.0 (transitive_subpackage) - python: 3.6 → 3.10 (transitive_subpackage) - libpng: 1.6.34 → 1.6.37 (always_include_files_glob) - Update test_top_level_finalized assertion to match new xz version - Fix test_add_pip_as_python_dependency_from_condarc_file[False] by disabling template environment cloning for that test (template includes pip which defeats the test's purpose) - Skip R-related tests on osx-arm64 since r-base is not available in defaults channel for that platform
beckermr
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Feb 4, 2026
beckermr
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Feb 4, 2026
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I have a few questions and confusions on my part.
This was referenced Feb 4, 2026
- Use `conda create --clone` instead of platform-specific copy methods for proper prefix replacement in scripts and metadata files - Use MatchSpec for proper spec parsing instead of manual string splitting - Fix test_transitive_subpackage_dependency: update assertion for openssl 3.0 - Fix test_top_level_finalized: update xz version to 5.6 (available in channels) - Update news file and docstrings to reflect the conda clone approach
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Summary
This PR improves CI test speed through several optimizations:
CI Workflow Improvements
test_render_recipe) now only run in the dedicatedlinux-benchmarksjobrestore-keysfallback patterns for better cache hit rates across jobsmacos-15-inteltomacos-latest(ARM), which are 2-3x fasterTemplate Environment Cloning (New Feature)
test_env_templateconfig option: Allowscreate_envto clone from a pre-existing template environment instead of creating from scratchconda create --clone: Properly handles prefix replacement in scripts and metadata filesMatchSpecfor spec parsing: Correctly handles all spec formats including~=,>=, and bracket syntax likenumpy[version='>1.0']warm_package_cachepytest fixture: Creates a session-scoped template environment with Python, pip, setuptools, and expatTest Fixes
test_transitive_subpackage_dependencyassertion to match openssl 3.0 (config was updated from 1.0.2)test_top_level_finalizedto use xz 5.6 (5.4.2 no longer available in channels)Estimated CI Impact
Why
test_render_recipewas slowThe benchmark test uses a complex conda-forge recipe (
petsc4py) with ~950 lines ofconda_build_config.yamlgenerating 48 variants on Linux. This is intentional for benchmarking real-world rendering performance.Test plan
linux-benchmarksjob