reduce access ops to 9.6K Sets per sec
reduce access ops to 9.6K Sets per sec

Change-Id: I5d8e4b9c4a8ec598e7d13666767ec58a53d908f9
Reviewed-on: http://review.couchbase.org/52891
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>
Tested-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>

thomas-couchbase/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,EricACooper/perfrunner,mikewied/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,dkao-cb/perfrunner,vmx/perfrunner,vmx/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,couchbase/perfrunner,EricACooper/perfrunner,EricACooper/perfrunner,EricACooper/perfrunner,thomas-couchbase/perfrunner,dkao-cb/perfrunner,pavel-paulau/perfrunner,mikewied/perfrunner