JavaScript: base85, base91, base122, base32768

{const S=String.fromCharCode, n2cjk=n=>S(n+=n<6400?13312:n<27136?13568:16896),
Base={
e64(A){
	var a=62,b=0,c,z=A.length,B=new Uint8Array((z*4+2)/3),C=new Uint8Array(64);
	for(C[a]=43;a;)C[--a]=a>51?a-4:a>25?a+71:a+65;
	for(C[63]=47;a<z;B[b++]=C[63&c])c=A[a++]<<16|A[a++]<<8|A[a++],B[b++]=C[c>>18],B[b++]=C[63&c>>12],B[b++]=C[63&c>>6];
	return new TextDecoder().decode(B)
},
d64(A){
	if(typeof A=="string")A=new TextEncoder().encode(A);
	var a=62,b=0,c,z=A.length,B=new Uint8Array((z+2>>>2)*3-"0021"[z&3]),C=new Uint8Array(123);
	for(C[43]=a;C[--a>51?a-4:a>25?a+71:a+65]=a;);
	for(C[47]=63;a<z;B[b++]=255&c)c=C[A[a++]]<<18|C[A[a++]]<<12|C[A[a++]]<<6|C[A[a++]],B[b++]=c>>16,B[b++]=255&c>>8;
	return B
},
e85(B){
	var a=85,b,i,o=0,z=B.length,C=new Uint8Array(124),A=new Uint8Array((z*5+3)/4);
	for(;a;)C[--a]=a+38;
	for(C[54]=33;a<z;){
		b=(B[a++]|B[a++]<<8|B[a++]<<16|B[a++]<<24)>>>0;
		for(i=5;i--;b=b/85|0)A[o++]=C[b%85]
	}
	return new TextDecoder().decode(A)
},
d85(A){
	if(typeof A=="string")A=new TextEncoder().encode(A);
	var a=85,o=0,z=A.length,b=z%5,C=new Uint8Array(124),B=new Uint8Array((z-b)/5*4+(b&&b-1));
	for(;C[--a+38]=a;);
	for(C[33]=54,C[0..a]=0;a<z;B[o++]=b>>>24)
		b=52200625*C[A[a+=4]]+614125*C[A[a-1]]+7225*C[A[a-2]]+85*C[A[a-3]]+C[A[a++-4]],
		B[o++]=b,B[o++]=b>>8,B[o++]=b>>16;
	return B
},
e91(B){
	var a=91,b=0,c,z=B.length,n,o=0,A=new Uint8Array(z*1.24+2),C=new Uint8Array(a);
	for(;a;)C[--a]=(a>57)+!!a+a+33;
	for(;a<z;){
		c|=B[a++]<<b;b+=8;
		if(b>13){n=c&8191;
			if(n>88)c>>=13,b-=13;
			else n=c&16383,c>>=14,b-=14;
			A[o++]=C[n%91];A[o++]=C[n/91|0]
		}
	}
	if(b){
		A[o++]=C[c%91];
		if(b>7||c>90)A[o++]=C[c/91|0]
	}
	return new TextDecoder().decode(A.subarray(0,o))
},
d91(A){
	if(typeof A=="string")A=new TextEncoder().encode(A);
	for(var a=91,b=0,c=-1,d,e,o=0,C=new Uint8Array(126);C[(--a>57)+!!a+a+33]=a;);
	for(;d=A[a++];)
		if(d=C[d],~c)for(c+=d*91,e|=c<<b,b+=(c&8191)>88?13:14,c=-1;A[o++]=e&255,e>>=8,b-=8,b>7;);
		else c=d;
	if(~c)A[o++]=e|c<<b;
	return A.subarray(0,o)
},
e122(A){
	function g(c){
		if(a>=z)return-1;
		c=(254>>>b&A[a])<<b;c>>=1,b+=7;
		if(b<8||(b-=8,++a>=z))return c;
		return(65280>>b&A[a])>>8-b|c
	}
	var a=0,b=0,c,e=8,n,o=0,z=A.length,E=new Int8Array(256),B=new Uint8Array(z*1.15+3);
	for(n of[0,10,13,34,38,92])E[n]=e++;
	for(;c=g(),~c;B[o++]=c)
		if(e=E[c])n=g(),e=~n?194|28&e<<2:(n=c,222),B[o++]=e|n>>6,c=128|63&n;
	return new TextDecoder().decode(B.subarray(0,o))
},
d122(B){
	function p(n){n<<=1,c|=n>>b,b+=7;if(b>7)A[o++]=c,b-=8,c=n<<7-b&255}
	for(var a=0,b=0,c,d,e,o=0,z=B.length,E=[0,10,13,34,38,92],A=new Uint8Array(z*1.75);a<z;p(e))
		if(e=B.charCodeAt(a++),127<e)
			d=e>>8&7,7>d&&p(E[d]),e&=127;
	return A.subarray(0,o)
},
e32768(A){
	for(var a=0,b,c,i=0,n=0,z=A.length,s=[];a<z;)
		if(c=A[a++],n<8)b|=c<<7-n,n+=8;
		else n-=7,s[i++]=n2cjk(b|=c>>n),b=c<<15-n&32767;
	if(0<n)if(s[i++]=n2cjk(b),8<n)s[i++]=n2cjk(32768);
	return s.join("")
},
d32768(s){
	if(!s)return new Uint8Array(0);
	var a=0,b,c,i=0,n=s.length-1,z=15*(n>>3)+n%8*2,A=s[n]==n2cjk(32768);
	n%8<1&&!A&&z++,n%8&&A&&z--;
	A=new Uint8Array(z);
	for(n=0;a<z;n-=8,A[a++]=b>>n&255)
		if(n<8)c=s.charCodeAt(i++),b=b<<15|(c-=c<19712?13312:c<40704?13568:16896),n+=15;
	return A
}};
if(!this.Base)this.Base=Base}

const A=Array.from("That that is is that that is not is not is that it it is",a=>a.charCodeAt());
const z=A.length;

let e=Base.e64(A);
let d=Base.d64(e);
console.log(z,"->",e.length,e,d)

e=Base.e85(A);
d=Base.d85(e);
console.log(z,"->",e.length,e,d)

e=Base.e91(A);
d=Base.d91(e);
console.log(z,"->",e.length,e,d)

e=Base.e122(A);
d=Base.d122(e);
console.log(z,"->",e.replace(/[^\0-\x7f]/g,11).length,e,d)

e=Base.e32768(A);
d=Base.d32768(e);
console.log(z,"->",e.length*2,e,d)