Slow AES GCM encryption and decryption with Java 8u20

Question

I am trying to encrypt and decrypt data using AES/GCM/NoPadding. I installed the JCE Unlimited Strength Policy Files and ran the (simple minded) benchmark below. I\'ve done

Answer 1

The OpenSSL implementation is optimized by the assembly routine using pclmulqdq instruction(x86 platform). It very fast due to the paralleled algorithm.

The java implementation is slow. but it was also optimized in Hotspot using assembly routine(not paralleled). you have to warm up the jvm to use Hotspot intrinsic. The default value of -XX:CompileThreshold is 10000.

// pseudocode

warmUp_GCM_cipher_loop10000_times();

do_benchmark();