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performance.md: note StubBuilder.skipChildProcessingWhenBuildingStubs

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Yann Cébron 2020-06-02 14:53:43 +02:00
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reference_guide/performance/performance.md
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@ -59,6 +59,8 @@ Make sure to traverse only the nodes you need to.
For stub index, implement [`LightStubBuilder`](upsource:///platform/core-impl/src/com/intellij/psi/stubs/LightStubBuilder.java).
For other indices, you can obtain the light AST manually via `((PsiDependentFileContent) fileContent).getLighterAST()`.
If a custom language contains lazy-parseable elements that never or rarely contain any stubs, consider implementing `StubBuilder.skipChildProcessingWhenBuildingStubs()` (preferably using Lexer/node text).
#### Consider Prebuilt Stubs
If your language has a massive standard library, which is mostly the same for all users, you can avoid stub-indexing it