ghc performance diffs 8.6.5 vs 8.8 vs 8.10*(patch branch)

gistfile1.txt

Andi@Horzube MINGW64 /e/pan-os-syslog
$ cabal new-run bench -w /e/ghc_layout/_quick/stage1/bin/ghc.exe --allow-newer="*"
Up to date
benchmarking 8-1-Traffic-A ...
benchmarked 8-1-Traffic-A
time                 626.4 ns   (611.3 ns .. 647.4 ns)
                     0.987 R²   (0.971 R² .. 0.997 R²)
mean                 618.7 ns   (610.2 ns .. 634.3 ns)
std dev              38.10 ns   (25.20 ns .. 65.38 ns)
variance introduced by outliers: 39% (moderately inflated)

benchmarking 8-1-Threat-A ...
benchmarked 8-1-Threat-A
time                 689.7 ns   (655.7 ns .. 722.5 ns)
                     0.975 R²   (0.950 R² .. 0.991 R²)
mean                 710.9 ns   (690.7 ns .. 742.3 ns)
std dev              83.69 ns   (51.17 ns .. 123.4 ns)
variance introduced by outliers: 70% (severely inflated)

benchmarking 8-1-Threat-B ...
benchmarked 8-1-Threat-B
time                 779.2 ns   (747.3 ns .. 815.3 ns)
                     0.989 R²   (0.984 R² .. 0.996 R²)
mean                 765.3 ns   (753.8 ns .. 778.1 ns)
std dev              40.27 ns   (32.54 ns .. 51.08 ns)
variance introduced by outliers: 31% (moderately inflated)

benchmarking 8-1-Threat-C ...
benchmarked 8-1-Threat-C
time                 696.0 ns   (665.5 ns .. 742.6 ns)
                     0.970 R²   (0.944 R² .. 0.995 R²)
mean                 684.7 ns   (669.8 ns .. 707.4 ns)
std dev              60.04 ns   (40.90 ns .. 81.60 ns)
variance introduced by outliers: 57% (severely inflated)


Andi@Horzube MINGW64 /e/pan-os-syslog
$ cabal new-run bench -w /e/ghc-8.8.1/bin/ghc.exe
Resolving dependencies...
Up to date
benchmarking 8-1-Traffic-A ...
benchmarked 8-1-Traffic-A
time                 768.5 ns   (740.1 ns .. 808.8 ns)
                     0.969 R²   (0.940 R² .. 0.992 R²)
mean                 776.2 ns   (755.1 ns .. 822.7 ns)
std dev              98.41 ns   (56.85 ns .. 174.8 ns)
variance introduced by outliers: 73% (severely inflated)

benchmarking 8-1-Threat-A ...
benchmarked 8-1-Threat-A
time                 841.3 ns   (819.2 ns .. 861.5 ns)
                     0.988 R²   (0.976 R² .. 0.996 R²)
mean                 856.3 ns   (839.2 ns .. 886.0 ns)
std dev              69.06 ns   (44.81 ns .. 103.7 ns)
variance introduced by outliers: 51% (severely inflated)

benchmarking 8-1-Threat-B ...
benchmarked 8-1-Threat-B
time                 983.7 ns   (943.5 ns .. 1.039 us)
                     0.977 R²   (0.949 R² .. 0.996 R²)
mean                 1.007 us   (979.7 ns .. 1.066 us)
std dev              127.6 ns   (71.74 ns .. 203.1 ns)
variance introduced by outliers: 74% (severely inflated)

benchmarking 8-1-Threat-C ...
benchmarked 8-1-Threat-C
time                 815.5 ns   (790.1 ns .. 851.9 ns)
                     0.986 R²   (0.970 R² .. 0.997 R²)
mean                 803.7 ns   (792.4 ns .. 823.9 ns)
std dev              49.05 ns   (31.78 ns .. 74.23 ns)
variance introduced by outliers: 38% (moderately inflated)


Andi@Horzube MINGW64 /e/pan-os-syslog
$ cabal new-run bench #this is 8.6.5
Resolving dependencies...
Up to date
benchmarking 8-1-Traffic-A ...
benchmarked 8-1-Traffic-A
time                 677.6 ns   (631.9 ns .. 726.3 ns)
                     0.973 R²   (0.959 R² .. 0.991 R²)
mean                 669.4 ns   (650.5 ns .. 708.8 ns)
std dev              85.98 ns   (49.52 ns .. 154.9 ns)
variance introduced by outliers: 73% (severely inflated)

benchmarking 8-1-Threat-A ...
benchmarked 8-1-Threat-A
time                 768.6 ns   (712.9 ns .. 852.8 ns)
                     0.886 R²   (0.775 R² .. 0.987 R²)
mean                 745.6 ns   (720.2 ns .. 806.4 ns)
std dev              121.1 ns   (63.49 ns .. 242.5 ns)
variance introduced by outliers: 82% (severely inflated)

benchmarking 8-1-Threat-B ...
benchmarked 8-1-Threat-B
time                 803.0 ns   (758.1 ns .. 858.6 ns)
                     0.964 R²   (0.928 R² .. 0.989 R²)
mean                 831.4 ns   (808.4 ns .. 870.6 ns)
std dev              97.79 ns   (60.60 ns .. 153.1 ns)
variance introduced by outliers: 70% (severely inflated)

benchmarking 8-1-Threat-C ...
benchmarked 8-1-Threat-C
time                 697.0 ns   (653.8 ns .. 743.8 ns)
                     0.982 R²   (0.968 R² .. 0.994 R²)
mean                 718.5 ns   (697.6 ns .. 777.7 ns)
std dev              104.6 ns   (46.36 ns .. 200.7 ns)
variance introduced by outliers: 78% (severely inflated)