Cache tsconfig when generating per-file cache key.

kulshekhar · Aug 2, 2017 · a8de326 · a8de326
1 parent 95bd323
commit a8de326
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/preprocessor.ts b/src/preprocessor.ts
@@ -78,14 +78,17 @@ export function process(
     return src;
 }
 
+let tsConfig = undefined;
 export function getCacheKey(
     fileData: string,
     filePath: Path,
     configStr: string,
     options: TransformOptions = { instrument: false }): string {
 
     const jestConfig: JestConfig = JSON.parse(configStr);
-    const tsConfig = getTSConfig(jestConfig.globals, options.instrument);
+    if (!tsConfig) {
+        tsConfig = getTSConfig(jestConfig.globals, options.instrument);
+    }
 
     return crypto.createHash('md5')
         .update(JSON.stringify(tsConfig), 'utf8')