Issue 89: "Optimize" get-hits calculations
Issue 89: "Optimize" get-hits calculations

Instead of calling memset to zero out 804 bytes for each get command (and
iterate through a loop checking all of the 201 slab classes for the number of
hits each time, just increment the stat directly.

DigitalAce/memcached,gencer/memcached,Metaswitch/memcached,samanbarghi/memcached,tellapart/memcached,neutronsharc/memcached,DigitalAce/memcached,sagark/memcached-accel,leedc/memcached,cloudrain21/memcached-1,Dhruva6/memcached,jbergstroem/memcached,gencer/memcached,Metaswitch/memcached,cloudrain21/memcached-1,ClearwaterCore/memcached,mrkwse/memcached,guikcd/memcached,tmharrisonwang/memcached,leedc/memcached,cloudrain21/memcached,abhinavdangeti/memcached,Danzeer/memcached,dkrotx/memcached-dd,elfchief/memcached,niaomingjian/memcached,mitliucak/memcached,zbase/memcached,Danzeer/memcached,jeremiahyan/memcached,zaycev/memcached,Distrotech/memcached,gencer/memcached,jeremiahyan/memcached,amyvmiwei/memcached,Metaswitch/memcached,elfchief/memcached,13693100472/memcached,myPublicGit/memcached,daverigby/memcached,kamyu104/memcached,Dhruva6/memcached,owendCB/memcached,Distrotech/memcached,sagark/memcached-accel,kamyu104/memcached,tmharrisonwang/memcached,elfchief/memcached,daverigby/kv_engine,dormando/memcached,bpzhang/memcached,Dhruva6/memcached,zbase/memcached,osheroff/memcached_kdtree,osheroff/memcached_kdtree,leverich/memcached-affinity,mitliucak/memcached,Danzeer/memcached,mitliucak/memcached,dormando/memcached,zbase/memcached,bpzhang/memcached,williamcheungthu/memcached,neutronsharc/memcached,tellapart/memcached,couchbase/memcached,Dhruva6/memcached,niaomingjian/memcached,ClearwaterCore/memcached,myPublicGit/memcached,memcached/memcached,owendCB/memcached,surajdharmapuram/memcached,kamyu104/memcached,emcconville/memcached,elfchief/memcached,angusfenying/memcached-win64,owendCB/memcached,zaycev/memcached,guikcd/memcached,leedc/memcached,rmccullagh/memcached,rhli/memcached,zaycev/memcached,memcached/memcached,fengshao0907/memcached,angusfenying/memcached-win64,samanbarghi/memcached,romanticode/memcached,williamcheungthu/memcached,jimwwalker/memcached,mitliucak/memcached,dustin/memcached,myPublicGit/memcached,couchbase/memcached,dkrotx/memcached-dd,msg7086/repcached,cloudrain21/memcached-1,DSrcl/memcached,amyvmiwei/memcached,cloudrain21/memcached,tomykaira/memcached,samt42/memcached,Distrotech/memcached,alexandermerritt/memcached,neutronsharc/memcached,williamcheungthu/memcached,jeremiahyan/memcached,allen8807/memcached-1,mdounin/memcached,surajdharmapuram/memcached,ZhangZhenhua/memcached,dormando/memcached,zbase/memcached,cloudrain21/memcached,tomykaira/memcached,xiaosl/memcached,jbergstroem/memcached,surajdharmapuram/memcached,Metaswitch/memcached,rmccullagh/memcached,daverigby/memcached,myPublicGit/memcached,shelsonjava/memcached,samt42/memcached,owendCB/memcached,xiaosl/memcached,msg7086/repcached,sagark/memcached-accel,kamyu104/memcached,ZhangZhenhua/memcached,allen8807/memcached-1,leverich/memcached-affinity,rmccullagh/memcached,niaomingjian/memcached,bpzhang/memcached,couchbase/memcached,alexandermerritt/memcached,niaomingjian/memcached,DSrcl/memcached,DSrcl/memcached,alexandermerritt/memcached,elfchief/memcached,tomykaira/memcached,guikcd/memcached,rhli/memcached,cloudrain21/memcached,dianerdianer/memcached,fengshao0907/memcached,rmccullagh/memcached,13693100472/memcached,dkrotx/memcached-dd,romanticode/memcached,DSrcl/memcached,amyvmiwei/memcached,dustin/memcached,angusfenying/memcached-win64,zbase/memcached,jimwwalker/memcached,romanticode/memcached,mrkwse/memcached,dormando/memcached,samanbarghi/memcached,dkrotx/memcached-dd,amyvmiwei/memcached,13693100472/memcached,mrkwse/memcached,leverich/memcached-affinity,13693100472/memcached,EdwardLee03/memcached,dianerdianer/memcached,jimwwalker/memcached,sagark/memcached-accel,dustin/memcached,jeremiahyan/memcached,samt42/memcached,EdwardLee03/memcached,daverigby/kv_engine,ClearwaterCore/memcached,DigitalAce/memcached,allen8807/memcached-1,msg7086/repcached,xiaosl/memcached,guikcd/memcached,abhinavdangeti/memcached,Danzeer/memcached,tmharrisonwang/memcached,cloudrain21/memcached-1,dianerdianer/memcached,allen8807/memcached-1,jbergstroem/memcached,bpzhang/memcached,alexandermerritt/memcached,daverigby/kv_engine,shelsonjava/memcached,ZhangZhenhua/memcached,daverigby/memcached,mdounin/memcached,shelsonjava/memcached,rmccullagh/memcached,daverigby/memcached,abhinavdangeti/memcached,tellapart/memcached,williamcheungthu/memcached,osheroff/memcached_kdtree,romanticode/memcached,EdwardLee03/memcached,samt42/memcached,mdounin/memcached,fengshao0907/memcached,gencer/memcached,sagark/memcached-accel,daverigby/kv_engine,emcconville/memcached,ZhangZhenhua/memcached,memcached/memcached,couchbase/memcached,dianerdianer/memcached,angusfenying/memcached-win64,samanbarghi/memcached,gencer/memcached,rhli/memcached,surajdharmapuram/memcached,emcconville/memcached,zaycev/memcached,tmharrisonwang/memcached,13693100472/memcached,memcached/memcached,fengshao0907/memcached,msg7086/repcached,emcconville/memcached,EdwardLee03/memcached,xiaosl/memcached,abhinavdangeti/memcached,leedc/memcached,shelsonjava/memcached,ClearwaterCore/memcached,mrkwse/memcached,msg7086/repcached,abhinavdangeti/memcached,memcached/memcached,tomykaira/memcached,rhli/memcached,dormando/memcached,Metaswitch/memcached,guikcd/memcached,neutronsharc/memcached