I’m wondering why ROOT trees give a different size in bytes when calling:
Is there a reason for the difference (I am looking at the “File Size = xxx” number in Print, not the unzipped size), and, if so, which is more appropriate to use? The GetZipBytes result is always smaller than the Print result.
File Size in TTree::Print is the fZipBytes plus all the bytes used to store the keys in the file. See the source code for TTree::Print() http://root.cern.ch/root/html/src/TTree.cxx.html#KZpm1