Table-A) CPU performance: 10.5.r09, rebuilt and rerun, vs 10.5.r10c  
Legend:
10.5.r09rr  = geant4-10-05-ref-09 (rebuilt at the same time as 10.5.r10 & re-run) 
10.5.r10c   = geant4-10-05-ref-10 outfitted with fixes to FTF in early Nov. 2019; 
                                  informal tarball, per communications with Alberto R.

Average (CPU Time)/Event: 10.5.r09rr  vs 10.5.r10c
#----------------------------------------------------------------------------
#  105r09rr                105r10c               100*(r10c-rr)/rr  sample
#
#  mean      error         mean      error       %diff error
#----------------------------------------------------------------------------
  279.1600   2.3038 	  284.2400   2.7545 	   1.8  1.3	 higgs.FTFP_BERT.1400.4 
   16.3630   0.0740 	   16.6200   0.0789 	   1.6  0.7	 e-100MeV.FTFP_BERT.100MeV.4 
   35.0330   0.2247 	   35.9870   0.2290 	   2.7  0.9	 e-100MeV.Shielding.100MeV.4 
  103.9500   0.8122 	  106.0000   0.6224 	   2.0  1.0	 e-100MeV.Shielding_EMZ.100MeV.4 
    0.0149   0.0001 	    0.0147   0.0001 	  -1.3  0.9	 e-.FTFP_BERT.1.0 
    0.0744   0.0003 	    0.0738   0.0004 	  -0.8  0.7	 e-.FTFP_BERT.5.0 
    0.1488   0.0006 	    0.1474   0.0009 	  -0.9  0.7	 e-.FTFP_BERT.10.0 
    0.7136   0.0032 	    0.7258   0.0045 	   1.7  0.8	 e-.FTFP_BERT.50.0 
    0.0196   0.0001 	    0.0197   0.0001 	   0.5  0.7	 e-.FTFP_BERT.1.4 
    0.0985   0.0004 	    0.0987   0.0005 	   0.2  0.7	 e-.FTFP_BERT.5.4 
    0.1971   0.0008 	    0.1977   0.0012 	   0.3  0.7	 e-.FTFP_BERT.10.4 
    0.9539   0.0038 	    0.9764   0.0057 	   2.4  0.7	 e-.FTFP_BERT.50.4 
    0.0253   0.0001 	    0.0250   0.0001 	  -1.2  0.6	 pi-.FTFP_BERT.1.0 
    0.1037   0.0003 	    0.1021   0.0005 	  -1.5  0.6	 pi-.FTFP_BERT.5.0 
    0.1939   0.0007 	    0.1910   0.0010 	  -1.5  0.6	 pi-.FTFP_BERT.10.0 
    0.8786   0.0038 	    0.8833   0.0061 	   0.5  0.8	 pi-.FTFP_BERT.50.0 
    0.0287   0.0001 	    0.0286   0.0002 	  -0.3  0.8	 pi-.FTFP_BERT.1.4 
    0.1199   0.0005 	    0.1199   0.0006 	   0.0  0.7	 pi-.FTFP_BERT.5.4 
    0.2288   0.0008 	    0.2264   0.0010 	  -1.0  0.6	 pi-.FTFP_BERT.10.4 
    1.0637   0.0045 	    1.0772   0.0064 	   1.3  0.7	 pi-.FTFP_BERT.50.4 
    0.0288   0.0001 	    0.0286   0.0002 	  -0.7  0.8	 pi-.QGSP_BERT.1.4 
    0.1201   0.0005 	    0.1196   0.0009 	  -0.4  0.9	 pi-.QGSP_BERT.5.4 
    0.2285   0.0008 	    0.2263   0.0011 	  -1.0  0.6	 pi-.QGSP_BERT.10.4 
    1.0607   0.0051 	    1.0723   0.0073 	   1.1  0.8	 pi-.QGSP_BERT.50.4 
    0.0289   0.0001 	    0.0286   0.0001 	  -1.0  0.5	 pi-.QGSP_BIC.1.4 
    0.1232   0.0004 	    0.1219   0.0005 	  -1.1  0.5	 pi-.QGSP_BIC.5.4 
    0.2340   0.0009 	    0.2328   0.0010 	  -0.5  0.6	 pi-.QGSP_BIC.10.4 
    1.0885   0.0059 	    1.0949   0.0049 	   0.6  0.7	 pi-.QGSP_BIC.50.4 
    0.0670   0.0003 	    0.0676   0.0003 	   0.9  0.6	 anti_proton.FTFP_BERT.1.4 
    0.1593   0.0006 	    0.1587   0.0008 	  -0.4  0.6	 anti_proton.FTFP_BERT.5.4 
    0.2700   0.0010 	    0.2691   0.0012 	  -0.3  0.6	 anti_proton.FTFP_BERT.10.4 
    1.1149   0.0052 	    1.1261   0.0056 	   1.0  0.7	 anti_proton.FTFP_BERT.50.4 
    0.0194   0.0001 	    0.0192   0.0001 	  -1.0  0.7	 proton.FTFP_BERT.1.4 
    0.1168   0.0005 	    0.1163   0.0006 	  -0.4  0.7	 proton.FTFP_BERT.5.4 
    0.2322   0.0010 	    0.2305   0.0012 	  -0.7  0.7	 proton.FTFP_BERT.10.4 
    1.0809   0.0059 	    1.0940   0.0058 	   1.2  0.8	 proton.FTFP_BERT.50.4 
    0.1215   0.0006 	    0.1209   0.0005 	  -0.5  0.6	 pi-.FTFP_INCLXX.1.4 
    0.4155   0.0029 	    0.4108   0.0015 	  -1.1  0.8	 pi-.FTFP_INCLXX.5.4 
    0.7672   0.0052 	    0.7570   0.0028 	  -1.3  0.8	 pi-.FTFP_INCLXX.10.4 
    1.0615   0.0075 	    1.0560   0.0040 	  -0.5  0.8	 pi-.FTFP_INCLXX.15.4 
    0.0980   0.0008 	    0.0977   0.0004 	  -0.3  0.9	 proton.FTFP_INCLXX.1.4 
    0.4723   0.0032 	    0.4670   0.0017 	  -1.1  0.8	 proton.FTFP_INCLXX.5.4 
    0.8693   0.0052 	    0.8530   0.0034 	  -1.9  0.7	 proton.FTFP_INCLXX.10.4 
    1.2222   0.0089 	    1.2018   0.0051 	  -1.7  0.8	 proton.FTFP_INCLXX.15.4 
    0.1431   0.0004 	    0.1835   0.0006 	  28.2  0.6	 proton.FTFP_BERT_HP.1.4 
    0.7580   0.0017 	    0.9814   0.0034 	  29.5  0.5	 proton.FTFP_BERT_HP.5.4 
    0.1573   0.0003 	    0.1856   0.0006 	  18.0  0.4	 proton.Shielding.1.4 
    0.8430   0.0024 	    0.9891   0.0030 	  17.3  0.5	 proton.Shielding.5.4 
    0.1618   0.0009 	    0.1590   0.0009 	  -1.7  0.8	 gamma.FTFP_BERT_EMZ_AugerOff.250MeV.0 
    0.2283   0.0013 	    0.2268   0.0014 	  -0.7  0.8	 gamma.FTFP_BERT_EMZ_AugerOn.250MeV.0 
    0.0618   0.0004 	    0.0621   0.0003 	   0.5  0.8	 gamma.FTFP_BERT_EMZ_AugerOff.1.0 
    0.0883   0.0005 	    0.0890   0.0007 	   0.8  1.0	 gamma.FTFP_BERT_EMZ_AugerOn.1.0 

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

Table-B) Total Memory : 10.5.r09 vs 10.5.r10c
#-----------------------------------------------------------------------------
# total        memory           100*(r10c-r09)/r09 
# 105r09          105r10c       %diff           sample
#-----------------------------------------------------------------------------
  3930.9300 	  3844.3100 	-2.2	 higgs.FTFP_BERT.1400.4 
  103.3740 	  103.2440 	-0.1	 e-100MeV.FTFP_BERT.100MeV.4 
  53852.1000 	  53990.4000 	 0.3	 e-100MeV.Shielding.100MeV.4 
  97171.5000 	  97519.1000 	 0.4	 e-100MeV.Shielding_EMZ.100MeV.4 
   34.6538 	   34.9879 	 1.0	 e-.FTFP_BERT.1.0 
   35.6767 	   36.2509 	 1.6	 e-.FTFP_BERT.5.0 
   37.3787 	   37.2704 	-0.3	 e-.FTFP_BERT.10.0 
   46.2013 	   46.8451 	 1.4	 e-.FTFP_BERT.50.0 
   34.7526 	   34.9905 	 0.7	 e-.FTFP_BERT.1.4 
   35.8042 	   36.0829 	 0.8	 e-.FTFP_BERT.5.4 
   37.2971 	   37.2936 	-0.0	 e-.FTFP_BERT.10.4 
   46.5133 	   46.3775 	-0.3	 e-.FTFP_BERT.50.4 
   53.5077 	   52.9714 	-1.0	 pi-.FTFP_BERT.1.0 
  111.2390 	  112.0220 	 0.7	 pi-.FTFP_BERT.5.0 
  149.9980 	  143.2850 	-4.5	 pi-.FTFP_BERT.10.0 
  472.5830 	  472.8550 	 0.1	 pi-.FTFP_BERT.50.0 
   51.7143 	   54.3770 	 5.1	 pi-.FTFP_BERT.1.4 
  107.7880 	  107.2410 	-0.5	 pi-.FTFP_BERT.5.4 
  145.6520 	  144.2030 	-1.0	 pi-.FTFP_BERT.10.4 
  483.5150 	  456.6100 	-5.6	 pi-.FTFP_BERT.50.4 
   51.8307 	   54.5166 	 5.2	 pi-.QGSP_BERT.1.4 
  107.8200 	  107.3010 	-0.5	 pi-.QGSP_BERT.5.4 
  145.5960 	  144.1950 	-1.0	 pi-.QGSP_BERT.10.4 
  521.5700 	  502.2280 	-3.7	 pi-.QGSP_BERT.50.4 
  785.5900 	  763.1880 	-2.9	 pi-.QGSP_BIC.1.4 
  2675.9600 	  2635.5400 	-1.5	 pi-.QGSP_BIC.5.4 
  4406.9800 	  4320.6300 	-2.0	 pi-.QGSP_BIC.10.4 
  16445.8000 	  16382.2000 	-0.4	 pi-.QGSP_BIC.50.4 
   76.4923 	   76.5587 	 0.1	 anti_proton.FTFP_BERT.1.4 
  125.6570 	  117.9680 	-6.1	 anti_proton.FTFP_BERT.5.4 
  174.1050 	  174.2830 	 0.1	 anti_proton.FTFP_BERT.10.4 
  525.6590 	  531.0560 	 1.0	 anti_proton.FTFP_BERT.50.4 
   48.4693 	   49.1609 	 1.4	 proton.FTFP_BERT.1.4 
  116.9220 	  114.8350 	-1.8	 proton.FTFP_BERT.5.4 
  181.5820 	  181.2760 	-0.2	 proton.FTFP_BERT.10.4 
  544.2760 	  565.5870 	 3.9	 proton.FTFP_BERT.50.4 
  2150.2200 	  2187.6500 	 1.7	 pi-.FTFP_INCLXX.1.4 
  6656.2600 	  6718.8500 	 0.9	 pi-.FTFP_INCLXX.5.4 
  12250.4000 	  12151.4000 	-0.8	 pi-.FTFP_INCLXX.10.4 
  16343.7000 	  16797.4000 	 2.8	 pi-.FTFP_INCLXX.15.4 
  1772.2600 	  1817.5600 	 2.6	 proton.FTFP_INCLXX.1.4 
  8189.9300 	  7956.8500 	-2.8	 proton.FTFP_INCLXX.5.4 
  14430.0000 	  14266.1000 	-1.1	 proton.FTFP_INCLXX.10.4 
  19558.3000 	  19615.5000 	 0.3	 proton.FTFP_INCLXX.15.4 
  12346.9000 	  13418.9000 	 8.7	 proton.FTFP_BERT_HP.1.4 
  16589.5000 	  23379.0000 	40.9	 proton.FTFP_BERT_HP.5.4 
  12824.5000 	  13444.4000 	 4.8	 proton.Shielding.1.4 
  19401.1000 	  23480.3000 	21.0	 proton.Shielding.5.4 
  369.2220 	  367.8720 	-0.4	 gamma.FTFP_BERT_EMZ_AugerOff.250MeV.0 
  658.2290 	  655.4550 	-0.4	 gamma.FTFP_BERT_EMZ_AugerOn.250MeV.0 
  915.4440 	  917.0540 	 0.2	 gamma.FTFP_BERT_EMZ_AugerOff.1.0 
  2066.0800 	  2062.1200 	-0.2	 gamma.FTFP_BERT_EMZ_AugerOn.1.0