/data/retesteth/build/retesteth/retesteth -t DifficultyTests -- --all -j2 --nologcolor --exectimelog --clients t8ntool --testpath /data/tests 
Running tests using path: /data/tests
Running 7 test cases...
Retesteth config path: /home/ubuntu/.retesteth
Active client configurations: 't8ntool '
Running tests for config 'Ethereum GO on StateTool' 2
Test Case "dfArrowGlacier": (1 of 7)
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Tests finished: 5
dfArrowGlacier time: 68.37, cputime: 2.83 (4%), t8ntime: 130.68 (191%)
Running tests for config 'Ethereum GO on StateTool' 2
Test Case "dfByzantium": (2 of 7)
100%
Tests finished: 1
dfByzantium time: 84.51, cputime: 1.94 (2%), t8ntime: 82.93 (98%)
Running tests for config 'Ethereum GO on StateTool' 2
Test Case "dfConstantinople": (3 of 7)
100%
Tests finished: 1
dfConstantinople time: 84.16, cputime: 1.93 (2%), t8ntime: 82.58 (98%)
Running tests for config 'Ethereum GO on StateTool' 2
Test Case "dfEIP2384": (4 of 7)
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Tests finished: 3
dfEIP2384 time: 112.32, cputime: 4.45 (3%), t8ntime: 210.12 (187%)
Running tests for config 'Ethereum GO on StateTool' 2
Test Case "dfFrontier": (5 of 7)
100%
Tests finished: 1
dfFrontier time: 82.54, cputime: 1.91 (2%), t8ntime: 80.96 (98%)
Running tests for config 'Ethereum GO on StateTool' 2
Test Case "dfGrayGlacier": (6 of 7)
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Tests finished: 5
dfGrayGlacier time: 75.38, cputime: 2.54 (3%), t8ntime: 118.28 (156%)
Running tests for config 'Ethereum GO on StateTool' 2
Test Case "dfHomestead": (7 of 7)
100%
Tests finished: 1
dfHomestead time: 85.40, cputime: 1.95 (2%), t8ntime: 83.79 (98%)

*** No errors detected
*** Total Tests Run: 17

*** Execution time stats
Total Time:                               : 592.68          :   17.55 (2%)              :  789.34 (133%)
dfEIP2384                             time: 112.32   cputime:    4.45 (3%)       t8ntime:  210.12 (187%)
dfHomestead                           time: 85.40    cputime:    1.95 (2%)       t8ntime:   83.79 (98%)
dfByzantium                           time: 84.51    cputime:    1.94 (2%)       t8ntime:   82.93 (98%)
dfConstantinople                      time: 84.16    cputime:    1.93 (2%)       t8ntime:   82.58 (98%)
dfFrontier                            time: 82.54    cputime:    1.91 (2%)       t8ntime:   80.96 (98%)
dfGrayGlacier                         time: 75.38    cputime:    2.54 (3%)       t8ntime:  118.28 (156%)
dfArrowGlacier                        time: 68.37    cputime:    2.83 (4%)       t8ntime:  130.68 (191%)