转到 https 后，我的页面需要等待很长时间

Question

最近我的网站开始在每个页面上使用过多的加载时间。在第一个 GET 请求之后，我得到了以下信息：

           "receive" : 2,
           "dns" : 15,
           "send" : 0,
           "ssl" : 100,
           "wait" : 6005,
           "blocked" : 1,
           "connect" : 142

我怀疑这与 SSL 证书 (Let's Encrypt) 有关，因为我的相同子域名http://stage.example.com没有出现这种情况。在阶段网站上，等待时间约为 1 秒。

我的文件中有这个内容.htaccess用于将用户重定向到 https：

RewriteEngine on
  RewriteCond %{HTTPS} !=on
  # This checks to make sure the connection is not already HTTPS

  RewriteRule ^/?(.*) https://%{SERVER_NAME}/$1 [R,L]
  # This rule will redirect users from their original location, to the same location but using HTTPS.
  # i.e.  http://www.example.com/foo/ to https://www.example.com/foo/
  # The leading slash is made optional so that this will work either in httpd.conf
  # or .htaccess context


  # Set "protossl" to "s" if we were accessed via https://.  This is used later
  # if you enable "www." stripping or enforcement, in order to ensure that
  # you don't bounce between http and https.
  RewriteRule ^ - [E=protossl]
  RewriteCond %{HTTPS} on
  RewriteRule ^ - [E=protossl:s]

谁能想到我的生产站点加载时间这么长可能的原因？

已编辑：抱歉，重定向规则不完整，上面的代码是我使用的。此外，当直接在根目录中访问 phpinfo.php 文件时，几乎没有任何等待时间（<50 毫秒）。