Table-A) CPU performance: 10.5.r06 (aka 10.6.beta) vs 10.5.master.july.09.19 
Legend:
10.5.r06    = geant4-10-05-ref-06 (re-used build of June 28, 2019)
10.5.master = geant4-dev/master (as of July 09, 2019) 

Average (CPU Time)/Event: 10.5.r06  vs 10.5.master
#----------------------------------------------------------------------------
#  105r06                  105master             100*(master-r06)/r06  sample
#
#  mean      error         mean      error       %diff error
#----------------------------------------------------------------------------
  270.6600   2.5042 	  277.4900   2.4533 	   2.5  1.3	 higgs.FTFP_BERT.1400.4 
   15.4580   0.1024 	   15.9900   0.0770 	   3.4  0.8	 e-100MeV.FTFP_BERT.100MeV.4 
   32.5520   0.2128 	   33.5650   0.3102 	   3.1  1.2	 e-100MeV.Shielding.100MeV.4 
   93.7080   0.6671 	   97.4670   0.7694 	   4.0  1.1	 e-100MeV.Shielding_EMZ.100MeV.4 
    0.0139   0.0001 	    0.0143   0.0001 	   2.9  1.0	 e-.FTFP_BERT.1.0 
    0.0698   0.0004 	    0.0718   0.0003 	   2.9  0.7	 e-.FTFP_BERT.5.0 
    0.1394   0.0007 	    0.1438   0.0006 	   3.2  0.7	 e-.FTFP_BERT.10.0 
    0.6932   0.0046 	    0.7125   0.0035 	   2.8  0.8	 e-.FTFP_BERT.50.0 
    0.0183   0.0001 	    0.0189   0.0001 	   3.3  0.8	 e-.FTFP_BERT.1.4 
    0.0916   0.0005 	    0.0948   0.0005 	   3.5  0.8	 e-.FTFP_BERT.5.4 
    0.1833   0.0009 	    0.1896   0.0009 	   3.4  0.7	 e-.FTFP_BERT.10.4 
    0.9129   0.0046 	    0.9428   0.0059 	   3.3  0.8	 e-.FTFP_BERT.50.4 
    0.0244   0.0001 	    0.0247   0.0001 	   1.2  0.6	 pi-.FTFP_BERT.1.0 
    0.1006   0.0006 	    0.1017   0.0004 	   1.1  0.7	 pi-.FTFP_BERT.5.0 
    0.1884   0.0009 	    0.1909   0.0007 	   1.3  0.6	 pi-.FTFP_BERT.10.0 
    0.8713   0.0050 	    0.8795   0.0055 	   0.9  0.9	 pi-.FTFP_BERT.50.0 
    0.0275   0.0002 	    0.0281   0.0001 	   2.2  0.8	 pi-.FTFP_BERT.1.4 
    0.1146   0.0006 	    0.1163   0.0005 	   1.5  0.7	 pi-.FTFP_BERT.5.4 
    0.2193   0.0011 	    0.2247   0.0009 	   2.5  0.7	 pi-.FTFP_BERT.10.4 
    1.0315   0.0057 	    1.0540   0.0052 	   2.2  0.8	 pi-.FTFP_BERT.50.4 
    0.0275   0.0002 	    0.0281   0.0001 	   2.2  0.8	 pi-.QGSP_BERT.1.4 
    0.1149   0.0005 	    0.1170   0.0005 	   1.8  0.6	 pi-.QGSP_BERT.5.4 
    0.2201   0.0010 	    0.2238   0.0010 	   1.7  0.6	 pi-.QGSP_BERT.10.4 
    1.0319   0.0050 	    1.0513   0.0065 	   1.9  0.8	 pi-.QGSP_BERT.50.4 
    0.0275   0.0001 	    0.0279   0.0001 	   1.5  0.5	 pi-.QGSP_BIC.1.4 
    0.1168   0.0005 	    0.1192   0.0006 	   2.1  0.7	 pi-.QGSP_BIC.5.4 
    0.2215   0.0010 	    0.2259   0.0010 	   2.0  0.6	 pi-.QGSP_BIC.10.4 
    1.0422   0.0057 	    1.0737   0.0057 	   3.0  0.8	 pi-.QGSP_BIC.50.4 
    0.0646   0.0004 	    0.0660   0.0004 	   2.2  0.9	 anti_proton.FTFP_BERT.1.4 
    0.1529   0.0007 	    0.1555   0.0007 	   1.7  0.7	 anti_proton.FTFP_BERT.5.4 
    0.2595   0.0014 	    0.2637   0.0013 	   1.6  0.7	 anti_proton.FTFP_BERT.10.4 
    1.0836   0.0061 	    1.1035   0.0060 	   1.8  0.8	 anti_proton.FTFP_BERT.50.4 
    0.0185   0.0001 	    0.0188   0.0001 	   1.6  0.8	 proton.FTFP_BERT.1.4 
    0.1099   0.0005 	    0.1115   0.0005 	   1.5  0.6	 proton.FTFP_BERT.5.4 
    0.2201   0.0012 	    0.2230   0.0010 	   1.3  0.7	 proton.FTFP_BERT.10.4 
    1.0518   0.0059 	    1.0701   0.0058 	   1.7  0.8	 proton.FTFP_BERT.50.4 
    0.1181   0.0007 	    0.1180   0.0007 	  -0.1  0.8	 pi-.FTFP_INCLXX.1.4 
    0.4026   0.0022 	    0.4040   0.0023 	   0.3  0.8	 pi-.FTFP_INCLXX.5.4 
    0.7159   0.0034 	    0.7393   0.0036 	   3.3  0.7	 pi-.FTFP_INCLXX.10.4 
    1.0315   0.0050 	    1.0340   0.0061 	   0.2  0.8	 pi-.FTFP_INCLXX.15.4 
    0.0950   0.0005 	    0.0962   0.0006 	   1.3  0.8	 proton.FTFP_INCLXX.1.4 
    0.4565   0.0024 	    0.4554   0.0026 	  -0.2  0.8	 proton.FTFP_INCLXX.5.4 
    0.8188   0.0043 	    0.8235   0.0044 	   0.6  0.8	 proton.FTFP_INCLXX.10.4 
    1.1827   0.0069 	    1.1768   0.0071 	  -0.5  0.8	 proton.FTFP_INCLXX.15.4 
    0.1450   0.0018 	    0.1422   0.0004 	  -1.9  1.2	 proton.FTFP_BERT_HP.1.4 
    0.7515   0.0046 	    0.7430   0.0019 	  -1.1  0.7	 proton.FTFP_BERT_HP.5.4 
    0.1560   0.0010 	    0.1563   0.0004 	   0.2  0.7	 proton.Shielding.1.4 
    0.8465   0.0089 	    0.8381   0.0024 	  -1.0  1.1	 proton.Shielding.5.4 
    0.1433   0.0010 	    0.1479   0.0011 	   3.2  1.1	 gamma.FTFP_BERT_EMZ_AugerOff.250MeV.0 
    0.2067   0.0017 	    0.2136   0.0016 	   3.3  1.1	 gamma.FTFP_BERT_EMZ_AugerOn.250MeV.0 
    0.0564   0.0004 	    0.0581   0.0004 	   3.0  1.0	 gamma.FTFP_BERT_EMZ_AugerOff.1.0 
    0.0816   0.0007 	    0.0842   0.0006 	   3.2  1.2	 gamma.FTFP_BERT_EMZ_AugerOn.1.0 
#----------------------------

Table-B) Total Memory : 10.5.r06 vs. 10.5.master
#-----------------------------------------------------------------------------
# total        memory           100*(master-r06)/r06 
# 105r06          105master     %diff           sample
#-----------------------------------------------------------------------------
  4261.1300 	  4046.2900 	-5.0	 higgs.FTFP_BERT.1400.4 
  119.5510 	  115.6410 	-3.3	 e-100MeV.FTFP_BERT.100MeV.4 
  56252.5000 	  56261.1000 	 0.0	 e-100MeV.Shielding.100MeV.4 
  99585.0000 	  99612.3000 	 0.0	 e-100MeV.Shielding_EMZ.100MeV.4 
   47.1500 	   47.1652 	 0.0	 e-.FTFP_BERT.1.0 
   48.4763 	   48.4922 	 0.0	 e-.FTFP_BERT.5.0 
   49.3873 	   49.4028 	 0.0	 e-.FTFP_BERT.10.0 
   59.7518 	   58.8160 	-1.6	 e-.FTFP_BERT.50.0 
   47.3974 	   47.1728 	-0.5	 e-.FTFP_BERT.1.4 
   49.7060 	   48.2644 	-2.9	 e-.FTFP_BERT.5.4 
   52.5119 	   49.9775 	-4.8	 e-.FTFP_BERT.10.4 
   74.5587 	   59.2456 	-20.5	 e-.FTFP_BERT.50.4 
   66.0311 	   66.0490 	 0.0	 pi-.FTFP_BERT.1.0 
  123.3630 	  122.4810 	-0.7	 pi-.FTFP_BERT.5.0 
  167.8530 	  169.7350 	 1.1	 pi-.FTFP_BERT.10.0 
  505.4380 	  483.4890 	-4.3	 pi-.FTFP_BERT.50.0 
   66.8361 	   65.9282 	-1.4	 pi-.FTFP_BERT.1.4 
  125.4550 	  126.4950 	 0.8	 pi-.FTFP_BERT.5.4 
  167.3910 	  173.3610 	 3.6	 pi-.FTFP_BERT.10.4 
  504.5890 	  495.3930 	-1.8	 pi-.FTFP_BERT.50.4 
   66.9405 	   66.0341 	-1.4	 pi-.QGSP_BERT.1.4 
  118.3920 	  123.1070 	 4.0	 pi-.QGSP_BERT.5.4 
  167.9300 	  167.3030 	-0.4	 pi-.QGSP_BERT.10.4 
  543.1860 	  533.4560 	-1.8	 pi-.QGSP_BERT.50.4 
  788.3500 	  763.3510 	-3.2	 pi-.QGSP_BIC.1.4 
  2646.2900 	  2617.1300 	-1.1	 pi-.QGSP_BIC.5.4 
  4327.5600 	  4360.4500 	 0.8	 pi-.QGSP_BIC.10.4 
  16494.1000 	  16599.9000 	 0.6	 pi-.QGSP_BIC.50.4 
   87.3625 	   85.7517 	-1.8	 anti_proton.FTFP_BERT.1.4 
  135.7680 	  137.6070 	 1.4	 anti_proton.FTFP_BERT.5.4 
  186.8550 	  187.0410 	 0.1	 anti_proton.FTFP_BERT.10.4 
  560.9630 	  568.6730 	 1.4	 anti_proton.FTFP_BERT.50.4 
   60.2488 	   60.5914 	 0.6	 proton.FTFP_BERT.1.4 
  124.4090 	  126.5480 	 1.7	 proton.FTFP_BERT.5.4 
  193.1750 	  189.4290 	-1.9	 proton.FTFP_BERT.10.4 
  580.8310 	  586.2200 	 0.9	 proton.FTFP_BERT.50.4 
  2146.8800 	  2068.6100 	-3.6	 pi-.FTFP_INCLXX.1.4 
  6701.9900 	  6613.5800 	-1.3	 pi-.FTFP_INCLXX.5.4 
  11583.3000 	  11727.8000 	 1.2	 pi-.FTFP_INCLXX.10.4 
  16392.9000 	  16029.2000 	-2.2	 pi-.FTFP_INCLXX.15.4 
  1766.5500 	  1791.9400 	 1.4	 proton.FTFP_INCLXX.1.4 
  7947.4900 	  7749.6400 	-2.5	 proton.FTFP_INCLXX.5.4 
  13819.8000 	  13718.5000 	-0.7	 proton.FTFP_INCLXX.10.4 
  19764.6000 	  19256.9000 	-2.6	 proton.FTFP_INCLXX.15.4 
  14770.1000 	  14793.9000 	 0.2	 proton.FTFP_BERT_HP.1.4 
  18901.1000 	  18914.2000 	 0.1	 proton.FTFP_BERT_HP.5.4 
  15217.1000 	  15271.0000 	 0.4	 proton.Shielding.1.4 
  21863.6000 	  21817.8000 	-0.2	 proton.Shielding.5.4 
  381.1940 	  381.2910 	 0.0	 gamma.FTFP_BERT_EMZ_AugerOff.250MeV.0 
  670.0140 	  670.1110 	 0.0	 gamma.FTFP_BERT_EMZ_AugerOn.250MeV.0 
  926.7030 	  926.8000 	 0.0	 gamma.FTFP_BERT_EMZ_AugerOff.1.0 
  2077.6500 	  2077.7500 	 0.0	 gamma.FTFP_BERT_EMZ_AugerOn.1.0