JDK-8200310 cleaned up java.nio.charset.StandardCharsets to not use Charset.forName, but also removed the optimization to have unconditionally loaded charsets set up static INSTANCE objects, which means that many systems the java.nio.charset.StandardCharsets will be initialized in System.initPhase1. This should be avoided since at this point the VM is just booting up and any code executed delays initialization of JIT etc.