note: before

BenchmarkFloatSub/100-4         20000000           115 ns/op
BenchmarkFloatSub/100-4         20000000           114 ns/op
BenchmarkFloatSub/100-4         20000000           115 ns/op
BenchmarkFloatSub/100-4         20000000           115 ns/op
BenchmarkFloatSub/100-4         20000000           115 ns/op

note: after

BenchmarkFloatSub/100-4         20000000            78.8 ns/op
BenchmarkFloatSub/100-4         20000000            78.8 ns/op
BenchmarkFloatSub/100-4         20000000            78.8 ns/op
BenchmarkFloatSub/100-4         20000000            78.8 ns/op
BenchmarkFloatSub/100-4         20000000            78.8 ns/op