          let start = 0;
            let end = 0;
            const entries = performance.getEntries();
            for (let i = 0; i < entries.length; i++) {
              const entry = entries[i];
              if (entry.name === 'start') {
                start = entry.startTime;
              } else if (entry.name === 'end') {
                end = entry.startTime;
              }
            }
            elm.textContent = String(end - start > 20);
            elm.className = 'testPerformanceEntries';
