Optimize finite difference a bit more
Optimize finite difference a bit more

aleksandr-bakanov/astropy,dhomeier/astropy,MSeifert04/astropy,MSeifert04/astropy,lpsinger/astropy,mhvk/astropy,AustereCuriosity/astropy,astropy/astropy,saimn/astropy,DougBurke/astropy,pllim/astropy,pllim/astropy,larrybradley/astropy,bsipocz/astropy,stargaser/astropy,larrybradley/astropy,saimn/astropy,astropy/astropy,bsipocz/astropy,stargaser/astropy,bsipocz/astropy,dhomeier/astropy,pllim/astropy,larrybradley/astropy,MSeifert04/astropy,mhvk/astropy,AustereCuriosity/astropy,astropy/astropy,StuartLittlefair/astropy,lpsinger/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,MSeifert04/astropy,AustereCuriosity/astropy,stargaser/astropy,larrybradley/astropy,saimn/astropy,saimn/astropy,dhomeier/astropy,DougBurke/astropy,lpsinger/astropy,StuartLittlefair/astropy,DougBurke/astropy,larrybradley/astropy,mhvk/astropy,saimn/astropy,AustereCuriosity/astropy,astropy/astropy,mhvk/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,pllim/astropy,mhvk/astropy,astropy/astropy,pllim/astropy,bsipocz/astropy,stargaser/astropy,lpsinger/astropy,DougBurke/astropy,funbaker/astropy,funbaker/astropy,funbaker/astropy,AustereCuriosity/astropy,lpsinger/astropy,dhomeier/astropy,funbaker/astropy,aleksandr-bakanov/astropy