Run results for: URL to key/value parsing

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.146 Safari/537.36

Browser: Chrome 88

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Manual parsing	152705.1 Ops/sec
Regex parsing 1	233719.9 Ops/sec

Script Preparation code:

function getConfigFromUrl(url) {
        if(!url) url = location.href;
        var question = url.indexOf("?");
        var hash = url.indexOf("#");
        if(hash==-1 && question==-1) return {};
        if(hash==-1) hash = url.length;
        var query = question==-1 || hash==question+1 ? url.substring(hash) :
        url.substring(question+1,hash);
        var result = {};
        query.split("&").forEach(function(part) {
          if(!part) return;
          part = part.split("+").join(" "); // replace every + with space, regexp-free version
          var eq = part.indexOf("=");
          var key = eq>-1 ? part.substr(0,eq) : part;
          var val = eq>-1 ? decodeURIComponent(part.substr(eq+1)) : "";
          var from = key.indexOf("[");
          if(from==-1) result[decodeURIComponent(key)] = val;
          else {
            var to = key.indexOf("]",from);
            var index = decodeURIComponent(key.substring(from+1,to));
            key = decodeURIComponent(key.substring(0,from));
            if(!result[key]) result[key] = [];
            if(!index) result[key].push(val);
            else result[key][index] = val;
          }
        });



        return result["viewer1.angle"];
    }

function regexMatch(url) {
	const keys = url.match(/(?<=\?.*)[A-z]+[A-z0-9]*.[A-z]+[A-z][A-z0-9]*(?=&?)/g);
  const vals = url.match(/(?<=[A-z]+[A-z0-9]*.[A-z]+[A-z0-9]*=)[^&]+(?=&?)/g);
  
  let output = {};
  
  for (let i=0; i<keys.length; i++) {
    output[keys[i]] = vals[i];
  }
  
  return output["viewer1.angle"];
}

let r;

Tests:

Manual parsing
r = getConfigFromUrl("http://localhost:8181/?viewer1.angle=123&viewer1.color=234234&viewer2.angle=123");
Regex parsing 1
r = regexMatch("http://localhost:8181/?viewer1.angle=123&viewer1.color=234234&viewer2.angle=123");

Run results for: URL to key/value parsing

Test of extracting key/value pairs from the location.href or other URLs

Manual parsing

Regex parsing 1