Run results for: parse hex-string to 'bytes like object' (Uint8Array) in javascript

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36 SE 2.X MetaSr 1.0

Browser: Sogou Explorer 1

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
bytes_fromhex1_10kb	5475.2 Ops/sec
bytes_fromhex1_nocheck_10kb	6800.3 Ops/sec
bytes_fromhex2_10kb	7609.9 Ops/sec

Script Preparation code:

function makehex(bytelength=1024){
    let i=-1,hex='';
    while(++i<bytelength){
        hex+=(Math.random()*100|0).toString(16).padStart(2,'0');
        }
    return hex
}

var hex10kb=makehex(1024*10)

function bytes_fromhex1(hex){//https://measurethat.net/Benchmarks/Show/107/4/parse-hex-to-bytes
	var bin = [], i, c, isEmpty = 1, buffer;
	for(i = 0; i < hex.length; i++){
		c = hex.charCodeAt(i);
		//if(c > 47 && c < 58 || c > 64 && c < 71 || c > 96 && c < 103){
			buffer = buffer << 4 ^ (c > 64 ? c + 9 : c) & 15;
			if(isEmpty ^= 1){
				bin.push(buffer & 0xff);
			}
		//}
	}
	return new Uint8Array(bin);
}

function bytes_fromhex1_nocheck(s){//do some change
    let i=-1,n=s.length,e=1,l=new Uint8Array(n/2);
    let c,b;
    while(++i<n){
        c=s.charCodeAt(i);
      	b=b<<4^(c>64?c+9:c)&15;
        if(e^=1){l[i>>1]=b&0xff};
    }
    return l
}

function bytes_fromhex2(input){
    let i=-1,len=input.length,output=new Uint8Array(len/2);
    let v1,v2;
    while(++i<len){
        v1=input.charCodeAt(i);
        v2=input.charCodeAt(++i);
        v1-=v1<58?48:v1<71?55:87;
        v2-=v2<58?48:v2<71?55:87;
        output[i>>1]=(v1<<4)+v2;
    };
    return output
}

/*
if((bytes_fromhex1(hex10kb).toString()==bytes_fromhex1_nocheck(hex10kb).toString())&&
(bytes_fromhex2(hex10kb).toString()==bytes_fromhex1_nocheck(hex10kb).toString()))
{console.log('10kbok')}
*/

Tests:

bytes_fromhex1_10kb
bytes_fromhex1(hex10kb);
bytes_fromhex1_nocheck_10kb
bytes_fromhex1_nocheck(hex10kb);
bytes_fromhex2_10kb
bytes_fromhex2(hex10kb);

Run results for: parse hex-string to 'bytes like object' (Uint8Array) in javascript

parse hex-string to 'bytes like object' (Uint8Array) in javascript

bytes_fromhex1_10kb

bytes_fromhex1_nocheck_10kb

bytes_fromhex2_10kb