Added speed test ~30 logs per millisecond
Added speed test ~30 logs per millisecond

spthaolt/easyloggingpp,hellowshinobu/easyloggingpp,utiasASRL/easyloggingpp,hellowshinobu/easyloggingpp,spqr33/easyloggingpp,dreal-deps/easyloggingpp,arvidsson/easyloggingpp,spqr33/easyloggingpp,arvidsson/easyloggingpp,spthaolt/easyloggingpp,blankme/easyloggingpp,utiasASRL/easyloggingpp,chenmusun/easyloggingpp,dreal-deps/easyloggingpp,utiasASRL/easyloggingpp,lisong521/easyloggingpp,blankme/easyloggingpp,chenmusun/easyloggingpp,simonhang/easyloggingpp,blankme/easyloggingpp,spqr33/easyloggingpp,lisong521/easyloggingpp,lisong521/easyloggingpp,hellowshinobu/easyloggingpp,simonhang/easyloggingpp,arvidsson/easyloggingpp,dreal-deps/easyloggingpp,spthaolt/easyloggingpp,simonhang/easyloggingpp,chenmusun/easyloggingpp