Speed up cppcheck 2.17.0 execution

Static source code analysis tool for C and C++ code

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Speed up cppcheck 2.17.0 execution

Forum: General Discussion

Creator: Lugnier

Created: 2025-04-25

Updated: 2025-04-25

Lugnier - 2025-04-25

Hi,

We have modified cppcheck 2.17.0 code to speed execution. Attached is a svn patch.
We added a cache (-15min) and use a simplified Match function (MatchOneOf) for pattern like "x|y|z" (-5min).
Run before modification 50 min.

Cédric

cppcheck-2.17.0-speedup.patch

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CHR - 2025-04-25

Please open a PR at https://github.com/danmar/cppcheck/pulls

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Oliver Stöneberg - 2025-04-25

Looking at the changes I have the feeling you were not using the matchcompiler. Token::Match() with literals are being converted to actual code by that. Only matches with run-time strings are usually showing up in the profiler.

And if a new match function is being introduced that should also be an internal check which makes sure that the given expression is valid for it.

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