benchmark old ns/op new ns/op delta BenchmarkIsDigit-8 34.1 1.10 -96.77% BenchmarkIsDigitUnsafe-8 33.8 0.55 -98.37% BenchmarkIsGraphic-8 127 1.11 -99.13% BenchmarkIsGraphicUnsafe-8 128 0.83 -99.35% BenchmarkIsLetter-8 40.9 1.10 -97.31% BenchmarkIsLetterUnsafe-8 40.7 0.55 -98.65% BenchmarkIsLower-8 30.2 1.12 -96.29% BenchmarkIsLowerUnsafe-8 30.2 0.83 -97.25% BenchmarkIsMark-8 35.0 1.10 -96.86% Benc