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[release/10.0] Improve PemEncoding.TryFind perf with degenerate inputs - #133250
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github-actions[bot] wants to merge 1 commit into
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[release/10.0] Improve PemEncoding.TryFind perf with degenerate inputs#133250github-actions[bot] wants to merge 1 commit into
github-actions[bot] wants to merge 1 commit into
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Rather than seeking for the correct PostEB, just ask if the next hyphen is the PostEB. If not, we can bypass the IsValidBase64 checks.
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bartonjs
approved these changes
Sep 4, 2026
bartonjs
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Sep 4, 2026
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/ba-g all test errors are marked as known? |
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Backport of #133137 to release/10.0
/cc @bartonjs
Customer Impact
When TryFind is given degenerate input, it wastes a lot of CPU time realizing that "-----" is not valid Base64.
Regression
Testing
Existing tests say that the new algorithm does not regress functionality, and the new test shows that degenerate inputs are handled well over 10x faster.
Risk
Low, due to test coverage.