@tamagui/react-native-web-lite/dist/esm/vendor/react-native/JSEventLoopWatchdog/index.mjs

React Native for Web

import { infoLog } from "../infoLog/index.mjs";
const JSEventLoopWatchdog = {
  getStats: function () {
    return {
      stallCount,
      totalStallTime,
      longestStall,
      acceptableBusyTime
    };
  },
  reset: function () {
    infoLog("JSEventLoopWatchdog: reset");
    totalStallTime = 0;
    stallCount = 0;
    longestStall = 0;
    lastInterval = window.performance.now();
  },
  addHandler: function (handler) {
    handlers.push(handler);
  },
  install: function ({
    thresholdMS
  }) {
    acceptableBusyTime = thresholdMS;
    if (installed) {
      return;
    }
    installed = true;
    lastInterval = window.performance.now();
    function iteration() {
      const now = window.performance.now();
      const busyTime = now - lastInterval;
      if (busyTime >= thresholdMS) {
        const stallTime = busyTime - thresholdMS;
        stallCount++;
        totalStallTime += stallTime;
        longestStall = Math.max(longestStall, stallTime);
        let msg = `JSEventLoopWatchdog: JS thread busy for ${busyTime}ms. ${totalStallTime}ms in ${stallCount} stalls so far. `;
        handlers.forEach(handler => {
          msg += handler.onStall({
            lastInterval,
            busyTime
          }) || "";
        });
        infoLog(msg);
      }
      handlers.forEach(handler => {
        handler.onIterate && handler.onIterate();
      });
      lastInterval = now;
      setTimeout(iteration, thresholdMS / 5);
    }
    iteration();
  }
};
let acceptableBusyTime = 0;
let installed = false;
let totalStallTime = 0;
let stallCount = 0;
let longestStall = 0;
let lastInterval = 0;
const handlers = [];
var JSEventLoopWatchdog_default = JSEventLoopWatchdog;
export { JSEventLoopWatchdog, JSEventLoopWatchdog_default as default };
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