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codeql/java/ql/src/Performance/NewStringString.ql
2025-06-18 16:43:40 +01:00

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/**
* @name Inefficient String constructor
* @description Using the 'String(String)' constructor is less memory efficient than using the
* constructor argument directly.
* @kind problem
* @problem.severity recommendation
* @precision high
* @id java/inefficient-string-constructor
* @tags quality
* maintainability
* readability
*/
import java
from ClassInstanceExpr e
where
e.getConstructor().getDeclaringType() instanceof TypeString and
e.getArgument(0).getType() instanceof TypeString
select e, "Inefficient new String(String) constructor."