micro-optimize cats #71

[nevillelyh]

Fixes #69 #71

Before:

[info] Benchmark                            Mode  Cnt     Score   Error  Units
[info] CatsBench.groupCombineAll            avgt       3578.376          ns/op
[info] CatsBench.groupCombineAllOption      avgt       3223.174          ns/op
[info] CatsBench.groupCombineN              avgt        276.500          ns/op
[info] CatsBench.groupRemove                avgt        139.310          ns/op
[info] CatsBench.monoidCombineAll           avgt       2699.879          ns/op
[info] CatsBench.monoidCombineAllOption     avgt       3902.616          ns/op
[info] CatsBench.monoidCombineN             avgt        269.873          ns/op
[info] CatsBench.semigroupCombineAllOption  avgt       3635.529          ns/op
[info] CatsBench.semigroupCombineN          avgt        276.072          ns/op

After:

[info] Benchmark                            Mode  Cnt     Score   Error  Units
[info] CatsBench.groupCombineAll            avgt       1547.365          ns/op
[info] CatsBench.groupCombineAllOption      avgt       1560.716          ns/op
[info] CatsBench.groupCombineN              avgt         32.705          ns/op
[info] CatsBench.groupRemove                avgt         26.642          ns/op
[info] CatsBench.monoidCombineAll           avgt       1654.055          ns/op
[info] CatsBench.monoidCombineAllOption     avgt       1551.833          ns/op
[info] CatsBench.monoidCombineN             avgt         32.472          ns/op
[info] CatsBench.semigroupCombineAllOption  avgt       1569.017          ns/op
[info] CatsBench.semigroupCombineN          avgt         37.198          ns/op

[codecov]

Codecov Report

Merging #75 into master will decrease coverage by 0.75%.
The diff coverage is 85.29%.

@@            Coverage Diff             @@
##           master      #75      +/-   ##
==========================================
- Coverage   95.09%   94.34%   -0.76%     
==========================================
  Files          19       19              
  Lines         408      442      +34     
  Branches       24       36      +12     
==========================================
+ Hits          388      417      +29     
- Misses         20       25       +5

Impacted Files	Coverage Δ
...cala/magnolify/cats/semiauto/GroupDerivation.scala	80.95% <70%> (-9.96%)	⬇️
.../magnolify/cats/semiauto/SemigroupDerivation.scala	90.9% <80%> (-3.21%)	⬇️
...ala/magnolify/cats/semiauto/MonoidDerivation.scala	92.59% <94.73%> (+5.09%)	⬆️

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