reduce some call overhead
reduce some call overhead

alex/sqlalchemy,dstufft/sqlalchemy,sqlalchemy/sqlalchemy,276361270/sqlalchemy,alex/sqlalchemy,inspirehep/sqlalchemy,itkovian/sqlalchemy,WinterNis/sqlalchemy,ThiefMaster/sqlalchemy,wfxiang08/sqlalchemy,robin900/sqlalchemy,graingert/sqlalchemy,epa/sqlalchemy,Cito/sqlalchemy,Akrog/sqlalchemy,276361270/sqlalchemy,WinterNis/sqlalchemy,itkovian/sqlalchemy,halfcrazy/sqlalchemy,monetate/sqlalchemy,EvaSDK/sqlalchemy,davidjb/sqlalchemy,Cito/sqlalchemy,alex/sqlalchemy,zzzeek/sqlalchemy,graingert/sqlalchemy,inspirehep/sqlalchemy,Akrog/sqlalchemy,elelianghh/sqlalchemy,monetate/sqlalchemy,sandan/sqlalchemy,brianv0/sqlalchemy,pdufour/sqlalchemy,dstufft/sqlalchemy,halfcrazy/sqlalchemy,j5int/sqlalchemy,davidfraser/sqlalchemy,bdupharm/sqlalchemy,davidfraser/sqlalchemy,hsum/sqlalchemy,elelianghh/sqlalchemy,olemis/sqlalchemy,davidjb/sqlalchemy,bootandy/sqlalchemy,sandan/sqlalchemy,wfxiang08/sqlalchemy,epa/sqlalchemy,robin900/sqlalchemy,olemis/sqlalchemy,EvaSDK/sqlalchemy,wujuguang/sqlalchemy,bdupharm/sqlalchemy,hsum/sqlalchemy,wujuguang/sqlalchemy,pdufour/sqlalchemy,bootandy/sqlalchemy,brianv0/sqlalchemy,j5int/sqlalchemy,Cito/sqlalchemy,ThiefMaster/sqlalchemy