ValidString("日本語日本語日本語日")
	}
}

func BenchmarkValidStringLongMostlyASCII(b *testing.B) {
	for i := 0; i < b.N; i++ {
		ValidString(longStringMostlyASCII)
	}
}

func BenchmarkValidStringLongJapanese(b *testing.B) {
	for i := 0; i < b.N; i++ {
		ValidString(longStringJapanese)
	}
}

var longStringMostlyASCII string // ~100KB, ~97% ASCII
var longStringJapanese string    // ~100KB, non-ASCII