Table-A) CPU performance: cmsExp vs cmsExpVG, 11.0.p03; all uses SerialOnly RM 
Legend:
cmsExpVG       = cmsExp + Geant4/VecGeom.1.2.1
11.0.p03.gcc11 = geant4-11-00-patch-03 - build gcc11.3.0 

Average (CPU Time)/Event: cmsExp  vs cmsExpVG
#----------------------------------------------------------------------------
#  cmsExp              cmsExpVG        100*(cmsExpVG-cmsExp)/cmsExp  sample
#
#  mean      error     mean      error    %diff    error
#----------------------------------------------------------------------------

   222.01    2.58      211.8     1.92     -4.6      1.3        higgs.FTFP_BERT.1400.4

#----------------------------------------------------------------------------


Table-B) CPU performance: 11.0.p03.gcc11 vs 11.0.p03.gcc8

Legend:
11.0.p03.gcc8  = geant4-11-00_patch-03 (gcc8.3.0;  Serial RM in app)
11.0.p03.gcc11 = geant4-11-00-patch-03 (gcc11.3.0; Serial RM in app)

Average (CPU Time)/Event:  11.0.p03.gcc8 vs 11.0.p03.gcc11
#----------------------------------------------------------------------------
#  110p03gcc8              110p03gcc11      100*(gcc11-gcc8)/gcc8    sample
#
#  mean      error         mean      error       %diff error
#----------------------------------------------------------------------------

  213.0100   1.7410 	  211.8000   1.9179 	  -0.6  1.2	 higgs.FTFP_BERT.1400.4 

#----------------------------------------------------------------------------


Table-C) Total Memory : 11.0.p03.gcc11 vs  11.0.p03.gcc8

#-----------------------------------------------------------------------------
# total           memory     100*(gcc11-gcc8)/gcc8 
# 110p03gcc8      110p03gcc11  %diff           sample
#-----------------------------------------------------------------------------

  10148.1000 	  10218.6000 	 0.7	 higgs.FTFP_BERT.1400.4 
       
#-----------------------------------------------------------------------------