[bug:1787325] TLS/SSL access of GlusterFS mounts is slower than with no TLS/SSL enabled.

[amarts]

bugzilla-URL: https://bugzilla.redhat.com/1787325
When we enable TLS/SSL on our data path we see a 50% performance hit in throughput.

Version-Release number of selected component (if applicable):

All glusterFS versions

How reproducible:

Every time.

Steps to Reproduce:

1. Run read / write perf test(say DD), note results
2. Enable TLS/SSL on the volume
3. Re run perf tests, compare throughput.

Actual results:

50% perf hit

Expected results:

Minimal performance hit.