Page gets slow and laggy on scrolling to the comments section

Hi, I'm reading the en tutorial and as I'm new to js I couldn't find out the reason for the slow and sluggish behavior in the browser whenever I scroll to the comments section of every tutorial page. But it's there, the cursor stops changing, the waiting circle around the favicon in the tab bar starts to turn and the chrome says do you want to exit the page in a dialogue. So I thought maybe you have an idea how to fix this behavior; maybe by showing the comments on a button click or by reducing the number of requests sent to the server simultaneously when scrolling to the comments section if that's the case.

Thanks for the great tutorial!

先在英文教學頁面捲動到留言區時重現延遲，並檢查在該處觸發的請求。Issue 提到留言載入和請求量可能是原因，但沒有指出檔案或測試；完成條件是捲動維持順暢回應，且不出現瀏覽器警告對話框。

由索引模型根據 Issue 內容生成。