script.js

clear()
var profiler = Components.classes["@mozilla.org/tools/profiler;1"]
  .getService(Components.interfaces.nsIProfiler);

var settings = {
  entries: 1000000,
  interval: 0.4,
  features: ["js", "stackwalk", "threads", "leaf"],
  threads: ["GeckoMain", "Compositor"]
}

profiler.StartProfiler(
  settings.entries,
  settings.interval,
  settings.features,
  settings.features.length,
  settings.threads,
  settings.threads.length
);

var data, samples

setTimeout(() => {
  console.log("getProfile", JSON.parse(profiler.GetProfile()));
  data = profiler.getProfileData();
  data.libs = JSON.parse(data.libs);
  console.log(data)
  profiler.StopProfiler();

  filledThreads = data.threads.map(thread => {
    const frameTable = applySchema(thread.frameTable)
    frameTable.forEach(stringTableApplier(thread.stringTable, "location"))
    frameTable.forEach(stringTableApplier(thread.stringTable, "implementation"));
    const stackTable = applySchema(thread.stackTable);
    const samples = applySchema(thread.samples) //.map(stackApplier(stackTable));
    const markers = applySchema(thread.markers);

    return Object.assign({}, thread, {frameTable, stackTable, samples, markers});
  })

  console.log(filledThreads);
}, 1000);

// Mutates the object by applying the string table.
function stringTableApplier (stringTable, key) {
  return (obj) => {
    const stringTableIndex = obj[key];
    if (stringTableIndex >= 0) {
      obj[key] = stringTable[stringTableIndex];
    }
  }
}

function schemaFiller (schema) {
  const schemaLookup = [];
  for (let key in schema) {
    if (schema.hasOwnProperty(key)) {
      const index = schema[key]
      schemaLookup[index] = key;
    }
  }

  return tuple => {
    return tuple.reduce((obj, value, i) => {
      obj[schemaLookup[i]] = value;
      return obj;
    }, {})
  }
}

function applySchema ({schema, data}) {
  const fillSchema = schemaFiller(schema)
  return data.map(fillSchema)
}

/*
const CATEGORY_MAPPINGS = {
  // js::ProfileEntry::Category::OTHER
  "16": CATEGORIES[0],
  // js::ProfileEntry::Category::CSS
  "32": CATEGORIES[1],
  // js::ProfileEntry::Category::JS
  "64": CATEGORIES[2],
  // js::ProfileEntry::Category::GC
  "128": CATEGORIES[3],
  // js::ProfileEntry::Category::CC
  "256": CATEGORIES[3],
  // js::ProfileEntry::Category::NETWORK
  "512": CATEGORIES[4],
  // js::ProfileEntry::Category::GRAPHICS
  "1024": CATEGORIES[5],
  // js::ProfileEntry::Category::STORAGE
  "2048": CATEGORIES[6],
  // js::ProfileEntry::Category::EVENTS
  "4096": CATEGORIES[7],
  // non-bitmasks for specially-assigned categories
  "9000": CATEGORIES[8],
};

function applyCategores () {

}
*/