Run results for: parse nested keys

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Browser: Chrome 141

Operating system: Windows

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
with regex	3665375.2 Ops/sec
with regex 2	5206278.5 Ops/sec
without regex	17701470.0 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
function parseKeys_1(path) {
  return path.split(".").flatMap((key) => {
      const match = key.match(/^([^[\]]+)(\[(\d+)\])?$/);
      if (!match) {
        throw new Error(`nestedProperty.set(). Invalid path segment: ${key}`);
      }
      return [match[1], match[3]].filter(Boolean);
    });
}

function parseKeys_2(path) {
  return path
    .replace(/\[(\w+)\]/g, '.$1') // convert [0] to .0
    .split('.')                   // split by dots
    .filter(Boolean);  
}

function parsePath(path) {
  const keys = [];
  let start = 0;

  for (let i = 0; i < path.length; i++) {
    const c = path[i];

    if (c === '.' || c === '[') {
      if (i > start) keys.push(path.substring(start, i));

      if (c === '[') {
        const close = path.indexOf(']', i);
        if (close === -1) throw new Error("Unmatched [");
        keys.push(path.substring(i + 1, close));
        i = close;
      }

      start = i + 1;
    }
  }

  if (start < path.length) keys.push(path.substring(start));
  return keys;
}

Tests:

with regex
parseKeys_1("obj.items[0].value")
with regex 2
parseKeys_2("obj.items[0].value")
without regex
parsePath("obj.items[0].value")

Run results for: parse nested keys

with regex

with regex 2

without regex