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| author | chriseth <chris@ethereum.org> | 2018-08-15 16:49:39 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-08-15 16:49:39 +0800 |
| commit | b9752b236b474e384a297fe832cf0efb161e8deb (patch) | |
| tree | 5c5d61fae37024a3ba2fea5bd7eaf0d455e6e043 /libsolidity/analysis/DeclarationContainer.cpp | |
| parent | 3c5226cefb9f883277530decedc08e2e48ed3050 (diff) | |
| parent | 3fa8829845bf55df812f81356a3ec43149836bb5 (diff) | |
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Merge pull request #4797 from bakaoh/issue4718
Fixes #4718: High CPU usage when using large variable names
Diffstat (limited to 'libsolidity/analysis/DeclarationContainer.cpp')
| -rw-r--r-- | libsolidity/analysis/DeclarationContainer.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libsolidity/analysis/DeclarationContainer.cpp b/libsolidity/analysis/DeclarationContainer.cpp index 347daaf8..5f980788 100644 --- a/libsolidity/analysis/DeclarationContainer.cpp +++ b/libsolidity/analysis/DeclarationContainer.cpp @@ -138,19 +138,22 @@ vector<Declaration const*> DeclarationContainer::resolveName(ASTString const& _n vector<ASTString> DeclarationContainer::similarNames(ASTString const& _name) const { static size_t const MAXIMUM_EDIT_DISTANCE = 2; + // because the function below has quadratic runtime - it will not magically improve once a better algorithm is discovered ;) + // since 80 is the suggested line length limit, we use 80^2 as length threshold + static size_t const MAXIMUM_LENGTH_THRESHOLD = 80 * 80; vector<ASTString> similar; for (auto const& declaration: m_declarations) { string const& declarationName = declaration.first; - if (stringWithinDistance(_name, declarationName, MAXIMUM_EDIT_DISTANCE)) + if (stringWithinDistance(_name, declarationName, MAXIMUM_EDIT_DISTANCE, MAXIMUM_LENGTH_THRESHOLD)) similar.push_back(declarationName); } for (auto const& declaration: m_invisibleDeclarations) { string const& declarationName = declaration.first; - if (stringWithinDistance(_name, declarationName, MAXIMUM_EDIT_DISTANCE)) + if (stringWithinDistance(_name, declarationName, MAXIMUM_EDIT_DISTANCE, MAXIMUM_LENGTH_THRESHOLD)) similar.push_back(declarationName); } |