Add a cheap AST probe in file-pipeline to detect if a file contains extending classes (using fileHasExtendingClass) and return early to avoid the expensive resolveImports recursive descent when not needed.
Update subclass-wrapper tests to import beforeAll and cache the plugin transform output and its stripped JS once in a beforeAll hook, replacing repeated transform calls with reused transformedOutput/strippedJs to reduce test runtime.
手瓜一十雪
a434da9e85