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Replace node.getSourceFile(), which climbs ancestors, with the sourceFile field on a RuleWalker.
#1896
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…rceFile` field on a RuleWalker.
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@andy-hanson thanks! This shares the same underlying issue as #1747 |
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PR checklist
What changes did you make?
Made a minor change for performance.
getSourceFileisn't good to call repeatedly from deep within a tree, especially when the source file is already a field of the class. https://github.com/Microsoft/TypeScript/blob/master/src/compiler/utilities.ts#L153