Java SSLSocket inefficient GCM

Question

I am using Java's SSLSocket with cipher suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

Which turned out to be very inefficient.

I want to still use the above cipher suite and override the Java's default algorithm with my implementation.

What is the best practice ? :

1. Override SSLSocket
2. Override SunJSSE provider
3. Other methods...