tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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timing-markers.js (1773B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 "use strict";
      6 
      7 const {
      8  ADD_REQUEST,
      9  ADD_TIMING_MARKER,
     10  CLEAR_TIMING_MARKERS,
     11  CLEAR_REQUESTS,
     12 } = require("resource://devtools/client/netmonitor/src/constants.js");
     13 
     14 function TimingMarkers() {
     15  return {
     16    firstDocumentDOMContentLoadedTimestamp: -1,
     17    firstDocumentLoadTimestamp: -1,
     18    firstDocumentRequestStartTimestamp: +Infinity,
     19  };
     20 }
     21 
     22 function addRequest(state, action) {
     23  const { startedMs } = action.data;
     24  if (startedMs < state.firstDocumentRequestStartTimestamp) {
     25    return {
     26      ...state,
     27      firstDocumentRequestStartTimestamp: startedMs,
     28    };
     29  }
     30 
     31  return state;
     32 }
     33 
     34 function addTimingMarker(state, action) {
     35  if (
     36    action.marker.name === "dom-interactive" &&
     37    state.firstDocumentDOMContentLoadedTimestamp === -1
     38  ) {
     39    return {
     40      ...state,
     41      firstDocumentDOMContentLoadedTimestamp: action.marker.time,
     42    };
     43  }
     44 
     45  if (
     46    action.marker.name === "dom-complete" &&
     47    state.firstDocumentLoadTimestamp === -1
     48  ) {
     49    return {
     50      ...state,
     51      firstDocumentLoadTimestamp: action.marker.time,
     52    };
     53  }
     54 
     55  return state;
     56 }
     57 
     58 function clearTimingMarkers() {
     59  return new TimingMarkers();
     60 }
     61 
     62 function timingMarkers(state = new TimingMarkers(), action) {
     63  switch (action.type) {
     64    case ADD_REQUEST:
     65      return addRequest(state, action);
     66 
     67    case ADD_TIMING_MARKER:
     68      return addTimingMarker(state, action);
     69 
     70    case CLEAR_REQUESTS:
     71    case CLEAR_TIMING_MARKERS:
     72      return clearTimingMarkers(state);
     73 
     74    default:
     75      return state;
     76  }
     77 }
     78 
     79 module.exports = {
     80  TimingMarkers,
     81  timingMarkers,
     82 };