Any other good approach instead of using reflection.getSubTypeOf in Java

For my project, i choose to using reflection to find all class in pkg coolection that implement the specified interface.

example like reflection.getSubTypeOf(MyClassInterface.class); MyClassInterface is like plugin concept.

Then the reflection will search through the pkg to find the class who implement this plugin.

It's work, but is slow during i doing the deployment. Here the disadvantage, when my project is growing huge, the reflection of searching will make the project deployment slow.

Any other way is better than using reflection ? i do search about something like lambdaMetaFactory to replace it.