High CPU usage while uploading file to GCS with Java API

Question

Could anyone suggest what could be the reason that com.sun.crypto.provider.GHASH#update(byte[], int, int) takes lots of CPU while uploading a file to GCS in Java?

Here is the code.

Looks like some internal SSL operation, however, SSL should not incur some much CPU burn.

Complete stacktrace with timings

Env specs:

java version "1.8.0_45"

Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

Ubuntu precise (12.04.3 LTS)

Tried google api versions:

com.google.apis:google-api-services-storage:v1-rev26-1.19.1

com.google.apis:google-api-services-storage:v1-rev33-1.20.0

Answer 1

Indeed, switching to Java 1.7.0_80-b15 has solved the issue. Even though sun's crypto methods, such as

com.sun.crypto.provider.ARCFOURCipher.engineUpdate(byte[], int, int, byte[], int) ARCFOURCipher.java 12104 12104

are still at the top of CPU consumers, they are much more moderate with this version.

Link to related bug in JDK