Hi Rooters... Again questions about file size... I write a tree (1 sigle branch of object Event). These Event objects are made of a list of integers and one double_t corresponding to an absolute time. Then I want to transform this absolute time in relative one and make a new file containing a new tree: this tree is exactly a clone of the previous one execpt that the time T of each event has been modified to T'=T-T0; If I comment the line doing the time modification (via a member function of Event), the 2 files have the same size whereas if the time modification is done this is note the case (for exemple, the size of the initial file is 177 kb while the final file has a size of 185 kb)... Why and what can I do ? Thank you for your answer, O. Meplan
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