much more efficient caching

tests/performance.c

@@ -31,7 +31,7 @@ int main(int argc, char** argv)
         ffLoadLogoSet(&instance.config, "arch");
         ffStrbufSetS(&instance.config.color, instance.config.logo.color);
         instance.config.showErrors = true;
-        instance.config.recache = true;
+        instance.config.recache = argc == 1;
         instance.config.cacheSave = false;
     )
 

tests/performance.sh

@@ -1,3 +1,4 @@
+rm -rf tests/build/
 mkdir -p tests/build/
 cd tests/build/
 cmake ../.. -DBUILD_TESTS=ON