Does not agree with Saltpack / GMP about base62 HOT 2 CLOSED

package testbase62

import (
	"bytes"
	"crypto/rand"
	"testing"

	"github.com/jxskiss/base62"
	"github.com/keybase/saltpack/encoding/basex"
)

var bytes1K []byte
var bytes4K []byte
var bytes1M []byte

func init() {
	bytes1K = make([]byte, 1024)
	bytes4K = make([]byte, 4096)
	bytes1M = make([]byte, 1024*1024)
	_, err1 := rand.Read(bytes1K)
	_, err2 := rand.Read(bytes4K)
	_, err3 := rand.Read(bytes1M)
	if err1 != nil || err2 != nil || err3 != nil {
		panic("rand.Read got error")
	}
}

func TestCorrectness(t *testing.T) {
	b1 := base62.Encode(bytes4K)
	b2, err := base62.Decode(b1)
	if err != nil {
		panic("base62 error")
	}
	if !bytes.Equal(bytes4K, b2) {
		panic("base62 not equal")
	}

	n3 := basex.Base62StdEncoding.EncodedLen(len(bytes4K))
	b3 := make([]byte, n3)
	basex.Base62StdEncoding.Encode(b3, bytes4K)
	n4 := basex.Base62StdEncoding.DecodedLen(len(b3))
	b4 := make([]byte, n4)
	nDec, err := basex.Base62StdEncoding.Decode(b4, b3)
	if err != nil {
		panic("basex error")
	}
	b4 = b4[:nDec]
	if !bytes.Equal(bytes4K, b4) {
		panic("basex not equal")
	}
}

func Benchmark_jxskiss_Base62_1K(b *testing.B) {
	for i := 0; i < b.N; i++ {
		_ = base62.Encode(bytes1K)
	}
}

func Benchmark_saltpack_Base62_1K(b *testing.B) {
	for i := 0; i < b.N; i++ {
		n := basex.Base62StdEncoding.EncodedLen(len(bytes1K))
		buf := make([]byte, n)
		basex.Base62StdEncoding.Encode(buf, bytes1K)
	}
}

func Benchmark_jxskiss_Base62_4K(b *testing.B) {
	for i := 0; i < b.N; i++ {
		_ = base62.Encode(bytes4K)
	}
}

func Benchmark_saltpack_Base62_4K(b *testing.B) {
	for i := 0; i < b.N; i++ {
		n := basex.Base62StdEncoding.EncodedLen(len(bytes4K))
		buf := make([]byte, n)
		basex.Base62StdEncoding.Encode(buf, bytes4K)
	}
}

func Benchmark_jxskiss_Base62_1M(b *testing.B) {
	for i := 0; i < b.N; i++ {
		_ = base62.Encode(bytes1M)
	}
}

func Benchmark_saltpack_Base62_1M(b *testing.B) {
	for i := 0; i < b.N; i++ {
		n := basex.Base62StdEncoding.EncodedLen(len(bytes1M))
		buf := make([]byte, n)
		basex.Base62StdEncoding.Encode(buf, bytes1M)
	}
}