@salesforce/pwa-kit-mcp/dist/tools/site-test-performance.js

MCP server that helps you build Salesforce Commerce Cloud PWA Kit Composable Storefront

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.runPerformanceTest = runPerformanceTest;
var _playwright = require("playwright");
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
function asyncGeneratorStep(n, t, e, r, o, a, c) { try { var i = n[a](c), u = i.value; } catch (n) { return void e(n); } i.done ? t(u) : Promise.resolve(u).then(r, o); }
function _asyncToGenerator(n) { return function () { var t = this, e = arguments; return new Promise(function (r, o) { var a = n.apply(t, e); function _next(n) { asyncGeneratorStep(a, r, o, _next, _throw, "next", n); } function _throw(n) { asyncGeneratorStep(a, r, o, _next, _throw, "throw", n); } _next(void 0); }); }; } /*
 * Copyright (c) 2025, Salesforce, Inc.
 * All rights reserved.
 * SPDX-License-Identifier: BSD-3-Clause
 * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
 */
function runPerformanceTest(_x) {
  return _runPerformanceTest.apply(this, arguments);
}
function _runPerformanceTest() {
  _runPerformanceTest = _asyncToGenerator(function* (siteUrl) {
    const browser = yield _playwright.chromium.launch();
    const page = yield browser.newPage();
    yield page.goto(siteUrl);

    // Wait for page to fully load
    yield page.waitForLoadState('load');

    // Extract detailed navigation timing data from the browser
    const navigationEntries = yield page.evaluate(() => {
      const nav = performance.getEntriesByType('navigation')[0];
      if (!nav) return null;
      return {
        type: nav.type,
        startTime: nav.startTime,
        unloadEventStart: nav.unloadEventStart,
        unloadEventEnd: nav.unloadEventEnd,
        redirectStart: nav.redirectStart,
        redirectEnd: nav.redirectEnd,
        fetchStart: nav.fetchStart,
        domainLookupStart: nav.domainLookupStart,
        domainLookupEnd: nav.domainLookupEnd,
        connectStart: nav.connectStart,
        connectEnd: nav.connectEnd,
        secureConnectionStart: nav.secureConnectionStart,
        requestStart: nav.requestStart,
        responseStart: nav.responseStart,
        responseEnd: nav.responseEnd,
        domLoading: nav.domLoading,
        domInteractive: nav.domInteractive,
        domContentLoadedEventStart: nav.domContentLoadedEventStart,
        domContentLoadedEventEnd: nav.domContentLoadedEventEnd,
        domComplete: nav.domComplete,
        loadEventStart: nav.loadEventStart,
        loadEventEnd: nav.loadEventEnd,
        duration: nav.duration
      };
    });

    // Fallback for browsers that don't support Navigation Timing Level 2
    const perfTiming = navigationEntries || (yield page.evaluate(() => JSON.parse(JSON.stringify(window.performance.timing))));

    // Calculate key metrics
    const metrics = _objectSpread({
      totalLoadTime: perfTiming.loadEventEnd - perfTiming.startTime,
      domContentLoadedTime: perfTiming.domContentLoadedEventEnd - perfTiming.startTime,
      timeToFirstByte: perfTiming.responseStart - perfTiming.startTime,
      domInteractive: perfTiming.domInteractive - perfTiming.startTime,
      firstPaint: perfTiming.responseEnd - perfTiming.startTime
    }, perfTiming);
    yield browser.close();
    return {
      content: [{
        type: 'text',
        text: `Total Load Time: ${metrics.totalLoadTime}ms, \
        DOM Content Loaded: ${metrics.domContentLoadedTime}ms, \
        Time to First Byte: ${metrics.timeToFirstByte}ms, 
        DOM Interactive: ${metrics.domInteractive}ms, \
        First Paint: ${metrics.firstPaint}ms`
      }]
    };
  });
  return _runPerformanceTest.apply(this, arguments);
}