Does creating a TCanvas load all libraries or something (very slow first load)

[Wile_E_Coyote]

There has been at least one similar report (“unsolved”, see the last posts):

Slow startup

Hi there, I am getting the same problem with 6.26/04 time root.exe -b -n -q; time root.exe -l -n -q-q ------------------------------------------------------------------ | Welcome to ROOT 6.26/04 https://root.cern | | (c) 1995-2021, The ROOT Team; conception: R. Brun, F. Rademakers | | Built for linuxx8664gcc on Jun 27 2022, 13:19:00 | | From heads/latest-stable@2bc8ca5a | | With c++ (GCC) 11.3.1 20220421 (Red Ha…

And possibly also this (though I’m not sure):

PyRoot imports taking a long time

Hi, I am using ROOT via python and have a basic simulation that I am running. The simulation itself works fine, but it is taking 27.5178 seconds to run. After running some diagnostics I have found that 27.0129 seconds of this time is being spent on importing root with the following line: from ROOT import TFile, TTree, TRandom3, TCanvas, TGraph, TF1, TH1F I am using a Windows system; and using WSL cmd line to run this program. I am using root-6.24.02. I was just wondering if anyone had any i…