How to render large dot files

sfdp -x -Tpng decix.fw.dot -o graph1.png

sfdp -x -Goverlap=scale -Tpng decix.fw.dot -o graph1.png

neato -x -Goverlap=scale -Tpng decix.fw.dot -o graph1.png

dot -Ksfdp -Tpng decix.fw.dot -o graph1.png

digraph foo { graph [splines=true overlap=false];

neato -Goverlap=scale -Tsvg mid.dot -o mid.svg