Run results for: querystringify pre-initialize regexp

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36

Browser: Chrome 61

Operating system: Mac OS X 10.12.6

Device Platform: Other

Date tested: 6 years ago

Test name	Executions per second
not prepared	268078.1 Ops/sec
prepared	250046.7 Ops/sec

Script Preparation code:

function decode(input) {
  return decodeURIComponent(input.replace(/\+/g, ' '));
}

function querystringNotPrepared(query) {
  var parser = /([^=?&]+)=?([^&]*)/g
    , result = {}
    , part;

  for (;
    part = parser.exec(query);
    result[decode(part[1])] = decode(part[2])
  );

  return result;
}

var PARSER = /([^=?&]+)=?([^&]*)/g;

function querystringPrepared(query) {
  var result = {}
    , part;

  for (;
    part = PARSER.exec(query);
    result[decode(part[1])] = decode(part[2])
  );

  return result;
}

Tests:

not prepared
querystringNotPrepared( 'foo=bar&bar=foo' );
prepared
querystringPrepared( 'foo=bar&bar=foo' );

Run results for: querystringify pre-initialize regexp

not prepared

prepared