AR init benchmarks for Rails 5.1.1 vs patched. See: https://gist.github.com/lovitt/b5edf05d11ef2571582c32d7547c1243

gistfile1.txt

================== Instantiate STI base class with attributes ==================

Warming up --------------------------------------
              v5.1.1   834.000  i/100ms
             patched     1.655k i/100ms
Calculating -------------------------------------
              v5.1.1      8.317k (±16.9%) i/s -     40.032k in   5.067138s
             patched     16.522k (± 6.1%) i/s -     82.750k in   5.026913s

Comparison:
             patched:    16522.1 i/s
              v5.1.1:     8317.0 i/s - 1.99x  slower


================ Instantiate STI base class without attributes =================

Warming up --------------------------------------
              v5.1.1   951.000  i/100ms
             patched     2.112k i/100ms
Calculating -------------------------------------
              v5.1.1      9.916k (±19.0%) i/s -     47.550k in   5.124357s
             patched     20.641k (± 5.3%) i/s -    103.488k in   5.028540s

Comparison:
             patched:    20641.2 i/s
              v5.1.1:     9916.0 i/s - 2.08x  slower


================= Instantiate STI subclass via type attribute ==================

Warming up --------------------------------------
              v5.1.1     1.028k i/100ms
             patched     1.319k i/100ms
Calculating -------------------------------------
              v5.1.1     10.143k (± 8.2%) i/s -     50.372k in   5.015323s
             patched     12.580k (± 6.3%) i/s -     63.312k in   5.053136s

Comparison:
             patched:    12579.5 i/s
              v5.1.1:    10143.0 i/s - 1.24x  slower


=================== Instantiate STI subclass with attributes ===================

Warming up --------------------------------------
              v5.1.1     1.305k i/100ms
             patched     1.673k i/100ms
Calculating -------------------------------------
              v5.1.1     12.811k (±10.2%) i/s -     63.945k in   5.064926s
             patched     16.324k (± 8.5%) i/s -     81.977k in   5.058501s

Comparison:
             patched:    16324.2 i/s
              v5.1.1:    12810.9 i/s - 1.27x  slower


================= Instantiate STI subclass without attributes ==================

Warming up --------------------------------------
              v5.1.1     1.703k i/100ms
             patched     2.108k i/100ms
Calculating -------------------------------------
              v5.1.1     16.174k (±18.9%) i/s -     76.635k in   5.033934s
             patched     21.405k (± 6.8%) i/s -    107.508k in   5.045254s

Comparison:
             patched:    21404.9 i/s
              v5.1.1:    16173.9 i/s - 1.32x  slower


================== Instantiate Non-STI class with attributes ===================

Warming up --------------------------------------
              v5.1.1     1.607k i/100ms
             patched     1.891k i/100ms
Calculating -------------------------------------
              v5.1.1     16.283k (±14.8%) i/s -     78.743k in   5.042009s
             patched     19.997k (± 5.7%) i/s -    100.223k in   5.028268s

Comparison:
             patched:    19997.0 i/s
              v5.1.1:    16283.3 i/s - 1.23x  slower


================= Instantiate Non-STI class without attributes =================

Warming up --------------------------------------
              v5.1.1     1.945k i/100ms
             patched     2.573k i/100ms
Calculating -------------------------------------
              v5.1.1     20.723k (±17.6%) i/s -     99.195k in   5.074382s
             patched     27.071k (± 9.7%) i/s -    133.796k in   5.003985s

Comparison:
             patched:    27071.0 i/s
              v5.1.1:    20723.3 i/s - 1.31x  slower