It's more performant than other similar libraries such as the Owner and cfg4j which no longer seems to be actively developed at this point and others such as Spring's Environment and MicroProfile config implementations

See benchmarks here: https://github.com/joel-jeremy/java-config-library-benchmark...

Aside from the performance, the other advantage of using this config library is how it makes testing easier and how easy it is to integrate with your dependency injection frameworks of choice.