profiles: slsa: Remove quadratic complexity in SRC_URI iteration #1399
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SLSA provenance generation iterates over $A (which is a subset of $SRC_URI) and for each of those tries to find a match in $SRC_URI. That's quadratic complexity, and the performance impact is bad because we shell out to a helper utility (basename) for every entry. This is leading to long stalls when generating SLSA for packages with long distfile lists, like go and rust packages. Iterate over SRC_URI once and create a dictionary to speed up subsequent lookups. dev-db/etcdctl is a good candidate for testing. Signed-off-by: Jeremi Piotrowski <[email protected]>
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Build action triggered: https://github.com/flatcar/scripts/actions/runs/7118559873 |
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@krnowak lets cherry-pick this into your PR then |
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Cherry picked to #1157. |
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speed up slsa provenance generation for some packages
SLSA provenance generation iterates over $A (which is a subset of $SRC_URI) and for each of those tries to find a match in $SRC_URI. That's quadratic complexity, and the performance impact is bad because we shell out to a helper utility (basename) for every entry. This is leading to long stalls when generating SLSA for packages with long distfile lists, like go and rust packages. Iterate over SRC_URI once and create a dictionary to speed up subsequent lookups. dev-db/etcdctl is a good candidate for testing.
How to use
Testing done
Before: >10min on my laptop
After: 1min on my laptop (includes build time)
[Describe the testing you have done before submitting this PR. Please include both the commands you issued as well as the output you got.]
changelog/directory (user-facing change, bug fix, security fix, update)/bootand/usrsize, packages, list files for any missing binaries, kernel modules, config files, kernel modules, etc.