How to benchmark my t-sql directly using dmv dm_exec_sessions

Tested on Sql Azure 11.0.9206.32
/*Get actual reads, writes and other nice to know stuff for benchmarking.Notice go statements which are crucial since stats seem to update by batch.*/ 
go
if object_id('tempdb..#stats') is not null drop table #stats select getdate() as startTime,cpu_time,memory_usage,reads,writes,logical_reads,session_id into #stats from sys.dm_exec_sessions a where session_id=@@spid
go
--do your magic stuff that need tuning
go

select   datediff(ms,s2.startTime,getdate()) as ElapsedMs,   s1.cpu_time-s2.cpu_time as cpu_time,   s1.memory_usage-s2.memory_usage as memory_usage,   s1.reads-s2.reads as reads,   s1.writes-s2.writes as writes,   s1.logical_reads-s2.logical_reads as logical_reads from sys.dm_exec_sessions s1   join #stats s2   on s1.session_id=s2.session_Id   where s1.session_id=@@spid

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