JavaScript使用performance实现查看内存

console.log(performance.memory);
{
    jsHeapSizeLimit: 4294705152
    totalJSHeapSize: 102883888
    usedJSHeapSize: 87997796
}

// 创建一个对象，用于测量其内存消耗
var myObj = { data: 'some data' };

// 在对象上执行一些操作，增加内存消耗
for (var i = 0; i < 100000; i++) {
    myObj['property' + i] = 'value' + i;
}
if (crossOriginIsolated) {
    runMemoryMeasurements(myObj)
} else {
  console.error(
        crossOriginIsolated + ' crossOriginIsolated\n Cross-Origin-Opener-Policy 设置为 same-origin（保护源站免受攻击）\n Cross-Origin-Embedder-Policy 设置为 require-corp（保护源站免受侵害）'
  );
}
function runMemoryMeasurements(obj) {
    const interval = 5000;
    console.log(`下一次测量5 秒.`);
    setTimeout(this.measureMemory(obj), interval);
}

function measureMemory(obj) {
    // 测量对象的内存消耗
    window.performance
     .measureUserAgentSpecificMemory(obj)
     .then(function (bytes) {
       console.log('内存占用:', getFileSize(bytes.bytes));
       runMemoryMeasurements(obj)
     });
}

function getFileSize(size) {
   //把字节转换成正常文件大小
   if (!size) return '';
   var num = 1024.0; //byte
   if (size < num) return size + 'B';
   if (size < Math.pow(num, 2)) return (size / num).toFixed(2) + 'KB'; //kb
   if (size < Math.pow(num, 3))
     return (size / Math.pow(num, 2)).toFixed(2) + 'MB'; //M
   if (size < Math.pow(num, 4))
     return (size / Math.pow(num, 3)).toFixed(2) + 'G'; //G
   return (size / Math.pow(num, 4)).toFixed(2) + 'T'; //T
}

  location /origin1 {
      add_header 'Cross-Origin-Embedder-Policy' 'require-corp';
      add_header 'Cross-Origin-Opener-Policy' 'same-origin';   
      ......
  }

const worker = new Worker('your-worker.js', { crossOriginIsolated: true });