Table-A) CPU performance: 10.5.r04(rrr) vs. 10.5.r06 (aka 10.6.beta)
Legend:
10.5.r04rrr = geant4-10-05-ref-04(re-build and re-run, as of June 28, 2019)
10.5.r06    = geant4-10-05-ref-06 

Average (CPU Time)/Event: 10.5.r04rr  vs 10.5.r06
#----------------------------------------------------------------------------
#  105r04rrr               105r06                100*(r06-r04rrr)/r04rrr  sample
#
#  mean      error         mean      error       %diff error
#----------------------------------------------------------------------------
  269.3900   3.1275 	  270.6600   2.5042 	   0.5  1.5	 higgs.FTFP_BERT.1400.4 
   15.2050   0.1148 	   15.4580   0.1024 	   1.7  1.0	 e-100MeV.FTFP_BERT.100MeV.4 
   31.6920   0.2409 	   32.5520   0.2128 	   2.7  1.0	 e-100MeV.Shielding.100MeV.4 
   93.4140   0.6680 	   93.7080   0.6671 	   0.3  1.0	 e-100MeV.Shielding_EMZ.100MeV.4 
    0.0139   0.0001 	    0.0139   0.0001 	   0.0  1.0	 e-.FTFP_BERT.1.0 
    0.0696   0.0005 	    0.0698   0.0004 	   0.3  0.9	 e-.FTFP_BERT.5.0 
    0.1394   0.0009 	    0.1394   0.0007 	   0.0  0.8	 e-.FTFP_BERT.10.0 
    0.6904   0.0053 	    0.6932   0.0046 	   0.4  1.0	 e-.FTFP_BERT.50.0 
    0.0180   0.0001 	    0.0183   0.0001 	   1.7  0.8	 e-.FTFP_BERT.1.4 
    0.0906   0.0007 	    0.0916   0.0005 	   1.1  1.0	 e-.FTFP_BERT.5.4 
    0.1812   0.0012 	    0.1833   0.0009 	   1.2  0.8	 e-.FTFP_BERT.10.4 
    0.8986   0.0064 	    0.9129   0.0046 	   1.6  0.9	 e-.FTFP_BERT.50.4 
    0.0248   0.0002 	    0.0244   0.0001 	  -1.6  0.9	 pi-.FTFP_BERT.1.0 
    0.1018   0.0006 	    0.1006   0.0006 	  -1.2  0.8	 pi-.FTFP_BERT.5.0 
    0.1900   0.0010 	    0.1884   0.0009 	  -0.8  0.7	 pi-.FTFP_BERT.10.0 
    0.8678   0.0060 	    0.8713   0.0050 	   0.4  0.9	 pi-.FTFP_BERT.50.0 
    0.0280   0.0002 	    0.0275   0.0002 	  -1.8  1.0	 pi-.FTFP_BERT.1.4 
    0.1153   0.0007 	    0.1146   0.0006 	  -0.6  0.8	 pi-.FTFP_BERT.5.4 
    0.2207   0.0014 	    0.2193   0.0011 	  -0.6  0.8	 pi-.FTFP_BERT.10.4 
    1.0366   0.0074 	    1.0315   0.0057 	  -0.5  0.9	 pi-.FTFP_BERT.50.4 
    0.0280   0.0002 	    0.0275   0.0002 	  -1.8  1.0	 pi-.QGSP_BERT.1.4 
    0.1154   0.0006 	    0.1149   0.0005 	  -0.4  0.7	 pi-.QGSP_BERT.5.4 
    0.2214   0.0011 	    0.2201   0.0010 	  -0.6  0.7	 pi-.QGSP_BERT.10.4 
    1.0286   0.0073 	    1.0319   0.0050 	   0.3  0.9	 pi-.QGSP_BERT.50.4 
    0.0275   0.0001 	    0.0275   0.0001 	   0.0  0.5	 pi-.QGSP_BIC.1.4 
    0.1164   0.0005 	    0.1168   0.0005 	   0.3  0.6	 pi-.QGSP_BIC.5.4 
    0.2214   0.0014 	    0.2215   0.0010 	   0.0  0.8	 pi-.QGSP_BIC.10.4 
    1.0392   0.0069 	    1.0422   0.0057 	   0.3  0.9	 pi-.QGSP_BIC.50.4 
    0.0650   0.0004 	    0.0646   0.0004 	  -0.6  0.9	 anti_proton.FTFP_BERT.1.4 
    0.1531   0.0008 	    0.1529   0.0007 	  -0.1  0.7	 anti_proton.FTFP_BERT.5.4 
    0.2602   0.0015 	    0.2595   0.0014 	  -0.3  0.8	 anti_proton.FTFP_BERT.10.4 
    1.0834   0.0074 	    1.0836   0.0061 	   0.0  0.9	 anti_proton.FTFP_BERT.50.4 
    0.0187   0.0001 	    0.0185   0.0001 	  -1.1  0.8	 proton.FTFP_BERT.1.4 
    0.1114   0.0006 	    0.1099   0.0005 	  -1.3  0.7	 proton.FTFP_BERT.5.4 
    0.2218   0.0013 	    0.2201   0.0012 	  -0.8  0.8	 proton.FTFP_BERT.10.4 
    1.0509   0.0064 	    1.0518   0.0059 	   0.1  0.8	 proton.FTFP_BERT.50.4 
    0.1167   0.0008 	    0.1181   0.0007 	   1.2  0.9	 pi-.FTFP_INCLXX.1.4 
    0.3977   0.0023 	    0.4026   0.0022 	   1.2  0.8	 pi-.FTFP_INCLXX.5.4 
    0.7206   0.0042 	    0.7159   0.0034 	  -0.7  0.7	 pi-.FTFP_INCLXX.10.4 
    1.0341   0.0060 	    1.0315   0.0050 	  -0.3  0.8	 pi-.FTFP_INCLXX.15.4 
    0.0930   0.0006 	    0.0950   0.0005 	   2.2  0.9	 proton.FTFP_INCLXX.1.4 
    0.4514   0.0028 	    0.4565   0.0024 	   1.1  0.8	 proton.FTFP_INCLXX.5.4 
    0.8245   0.0052 	    0.8188   0.0043 	  -0.7  0.8	 proton.FTFP_INCLXX.10.4 
    1.1562   0.0072 	    1.1827   0.0069 	   2.3  0.9	 proton.FTFP_INCLXX.15.4 
    0.1437   0.0008 	    0.1450   0.0018 	   0.9  1.4	 proton.FTFP_BERT_HP.1.4 
    0.7468   0.0026 	    0.7515   0.0046 	   0.6  0.7	 proton.FTFP_BERT_HP.5.4 
    0.1571   0.0011 	    0.1560   0.0010 	  -0.7  0.9	 proton.Shielding.1.4 
    0.8451   0.0046 	    0.8465   0.0089 	   0.2  1.2	 proton.Shielding.5.4 
    0.1416   0.0008 	    0.1433   0.0010 	   1.2  0.9	 gamma.FTFP_BERT_EMZ_AugerOff.250MeV.0 
    0.2045   0.0013 	    0.2067   0.0017 	   1.1  1.1	 gamma.FTFP_BERT_EMZ_AugerOn.250MeV.0 
    0.0558   0.0003 	    0.0564   0.0004 	   1.1  0.9	 gamma.FTFP_BERT_EMZ_AugerOff.1.0 
    0.0805   0.0005 	    0.0816   0.0007 	   1.4  1.1	 gamma.FTFP_BERT_EMZ_AugerOn.1.0 
#----------------------------

Table-B) Total Memory : 10.5.r04 vs. 10.5.r06
#-----------------------------------------------------------------------------
# total        memory         100*(r06-r04)/r04 
# 105r04          105r06      %diff           sample
#-----------------------------------------------------------------------------
  4206.5100 	  4261.1300 	 1.3	 higgs.FTFP_BERT.1400.4 
  115.0340 	  119.5510 	 3.9	 e-100MeV.FTFP_BERT.100MeV.4 
  56240.8000 	  56252.5000 	 0.0	 e-100MeV.Shielding.100MeV.4 
  99573.1000 	  99585.0000 	 0.0	 e-100MeV.Shielding_EMZ.100MeV.4 
   46.5568 	   47.1500 	 1.3	 e-.FTFP_BERT.1.0 
   47.5633 	   48.4763 	 1.9	 e-.FTFP_BERT.5.0 
   48.8021 	   49.3873 	 1.2	 e-.FTFP_BERT.10.0 
   58.8537 	   59.7518 	 1.5	 e-.FTFP_BERT.50.0 
   46.5594 	   47.3974 	 1.8	 e-.FTFP_BERT.1.4 
   48.1181 	   49.7060 	 3.3	 e-.FTFP_BERT.5.4 
   49.0314 	   52.5119 	 7.1	 e-.FTFP_BERT.10.4 
   58.6101 	   74.5587 	27.2	 e-.FTFP_BERT.50.4 
   66.3368 	   66.0311 	-0.5	 pi-.FTFP_BERT.1.0 
  123.0740 	  123.3630 	 0.2	 pi-.FTFP_BERT.5.0 
  170.6700 	  167.8530 	-1.7	 pi-.FTFP_BERT.10.0 
  494.2100 	  505.4380 	 2.3	 pi-.FTFP_BERT.50.0 
   64.6174 	   66.8361 	 3.4	 pi-.FTFP_BERT.1.4 
  118.1000 	  125.4550 	 6.2	 pi-.FTFP_BERT.5.4 
  169.4890 	  167.3910 	-1.2	 pi-.FTFP_BERT.10.4 
  497.1740 	  504.5890 	 1.5	 pi-.FTFP_BERT.50.4 
   64.7356 	   66.9405 	 3.4	 pi-.QGSP_BERT.1.4 
  123.7120 	  118.3920 	-4.3	 pi-.QGSP_BERT.5.4 
  174.3960 	  167.9300 	-3.7	 pi-.QGSP_BERT.10.4 
  557.9920 	  543.1860 	-2.7	 pi-.QGSP_BERT.50.4 
  762.0380 	  788.3500 	 3.5	 pi-.QGSP_BIC.1.4 
  2588.5500 	  2646.2900 	 2.2	 pi-.QGSP_BIC.5.4 
  4428.4900 	  4327.5600 	-2.3	 pi-.QGSP_BIC.10.4 
  16511.5000 	  16494.1000 	-0.1	 pi-.QGSP_BIC.50.4 
   88.2796 	   87.3625 	-1.0	 anti_proton.FTFP_BERT.1.4 
  136.0420 	  135.7680 	-0.2	 anti_proton.FTFP_BERT.5.4 
  190.9960 	  186.8550 	-2.2	 anti_proton.FTFP_BERT.10.4 
  566.8120 	  560.9630 	-1.0	 anti_proton.FTFP_BERT.50.4 
   60.0558 	   60.2488 	 0.3	 proton.FTFP_BERT.1.4 
  136.3070 	  124.4090 	-8.7	 proton.FTFP_BERT.5.4 
  190.1410 	  193.1750 	 1.6	 proton.FTFP_BERT.10.4 
  588.0130 	  580.8310 	-1.2	 proton.FTFP_BERT.50.4 
  2079.0200 	  2146.8800 	 3.3	 pi-.FTFP_INCLXX.1.4 
  6626.9900 	  6701.9900 	 1.1	 pi-.FTFP_INCLXX.5.4 
  11608.3000 	  11583.3000 	-0.2	 pi-.FTFP_INCLXX.10.4 
  16752.8000 	  16392.9000 	-2.1	 pi-.FTFP_INCLXX.15.4 
  1735.2000 	  1766.5500 	 1.8	 proton.FTFP_INCLXX.1.4 
  7852.0900 	  7947.4900 	 1.2	 proton.FTFP_INCLXX.5.4 
  14077.3000 	  13819.8000 	-1.8	 proton.FTFP_INCLXX.10.4 
  19004.1000 	  19764.6000 	 4.0	 proton.FTFP_INCLXX.15.4 
  14765.2000 	  14770.1000 	 0.0	 proton.FTFP_BERT_HP.1.4 
  18870.5000 	  18901.1000 	 0.2	 proton.FTFP_BERT_HP.5.4 
  15296.4000 	  15217.1000 	-0.5	 proton.Shielding.1.4 
  21828.9000 	  21863.6000 	 0.2	 proton.Shielding.5.4 
  381.3750 	  381.1940 	-0.0	 gamma.FTFP_BERT_EMZ_AugerOff.250MeV.0 
  665.7580 	  670.0140 	 0.6	 gamma.FTFP_BERT_EMZ_AugerOn.250MeV.0 
  929.4590 	  926.7030 	-0.3	 gamma.FTFP_BERT_EMZ_AugerOff.1.0 
  2072.9700 	  2077.6500 	 0.2	 gamma.FTFP_BERT_EMZ_AugerOn.1.0