Hi All,
I have a question, whether declaring default branches help improve running speed?
Since I want to analyze nanoAOD but it has lots of branches.
Does it really reduce running time?
// code example
// case 1
RDataFrame d1(*myTree, {"var1"});
d1.Filter("passMyFunc(var1)").Snapshot("newTree1","output1.root");
// case 2
RDataFrame d2(*myTree);
d2.Filter("passMyFunc(var1)").Snapshot("newTree2","output2.root");