BLD: test_perf, explicitly disable gc for runs, correct help message
BLD: test_perf, explicitly disable gc for runs, correct help message

harisbal/pandas,winklerand/pandas,jreback/pandas,kdebrab/pandas,kdebrab/pandas,Winand/pandas,linebp/pandas,cython-testbed/pandas,linebp/pandas,harisbal/pandas,jmmease/pandas,MJuddBooth/pandas,zfrenchee/pandas,datapythonista/pandas,harisbal/pandas,pratapvardhan/pandas,jmmease/pandas,pratapvardhan/pandas,harisbal/pandas,dsm054/pandas,gfyoung/pandas,pandas-dev/pandas,Winand/pandas,jorisvandenbossche/pandas,winklerand/pandas,zfrenchee/pandas,DGrady/pandas,toobaz/pandas,Winand/pandas,amolkahat/pandas,jorisvandenbossche/pandas,kdebrab/pandas,GuessWhoSamFoo/pandas,dsm054/pandas,nmartensen/pandas,pratapvardhan/pandas,Winand/pandas,Winand/pandas,cbertinato/pandas,TomAugspurger/pandas,GuessWhoSamFoo/pandas,datapythonista/pandas,Winand/pandas,winklerand/pandas,gfyoung/pandas,winklerand/pandas,jmmease/pandas,datapythonista/pandas,TomAugspurger/pandas,zfrenchee/pandas,jmmease/pandas,amolkahat/pandas,GuessWhoSamFoo/pandas,nmartensen/pandas,jorisvandenbossche/pandas,louispotok/pandas,dsm054/pandas,nmartensen/pandas,amolkahat/pandas,jreback/pandas,dsm054/pandas,cbertinato/pandas,MJuddBooth/pandas,linebp/pandas,DGrady/pandas,DGrady/pandas,cython-testbed/pandas,cython-testbed/pandas,toobaz/pandas,louispotok/pandas,MJuddBooth/pandas,jreback/pandas,winklerand/pandas,cython-testbed/pandas,kdebrab/pandas,amolkahat/pandas,jreback/pandas,DGrady/pandas,amolkahat/pandas,gfyoung/pandas,zfrenchee/pandas,louispotok/pandas,gfyoung/pandas,linebp/pandas,cbertinato/pandas,louispotok/pandas,rs2/pandas,kdebrab/pandas,DGrady/pandas,louispotok/pandas,toobaz/pandas,cbertinato/pandas,linebp/pandas,dsm054/pandas,pratapvardhan/pandas,winklerand/pandas,jreback/pandas,toobaz/pandas,pratapvardhan/pandas,jorisvandenbossche/pandas,toobaz/pandas,cbertinato/pandas,TomAugspurger/pandas,linebp/pandas,rs2/pandas,MJuddBooth/pandas,rs2/pandas,nmartensen/pandas,nmartensen/pandas,datapythonista/pandas,rs2/pandas,zfrenchee/pandas,cython-testbed/pandas,pandas-dev/pandas,GuessWhoSamFoo/pandas,TomAugspurger/pandas,pandas-dev/pandas,nmartensen/pandas,gfyoung/pandas,GuessWhoSamFoo/pandas,jmmease/pandas,MJuddBooth/pandas,DGrady/pandas,jmmease/pandas,pandas-dev/pandas,harisbal/pandas