HTTP.GET slow with SSL

I have just started with Shelly with a Shelly Plus i4DC. I am calling web-hooks from Shelly script because I want to have toggle-on/toggle-off on single clicks with buttons. Doing that, I realized that depending on whether using SSL and certificate verification, web-hook calling via HTTP.GET is quite slow. And the delay happens in the SSL hand-shake which is why the actions triggered by the web-hook get delayed by seconds. This is not cool when the buttons are supposed to turn on lights (as quickly as possible in order not to make users in a public space believe, the button/light is broken).

I am observing for SSL with certificate validation 3.8 seconds, for SSL without certificate validation 1.6 seconds and without SSL 0.4 seconds (which would be good enough but I don't want to give up on SSL yet).

Those calls, done from my Linux machine with curl take 0.5 seconds with SSL and 0.3 seconds without SSL.

Is this known? Can I do something about it? Can it be improved in the firmware?

This is my Shelly script to test the delays:

function ping_ssl_ca() {
  print('SSL with CA check');
  
  time0 = Date.now()
  Shelly.call('HTTP.GET', { 
      url: 'https://echo.free.beeceptor.com/'
    }, 
    function(result) {
      print('Result received at', Date.now()-time0, 'ms');
      ping_ssl_noca();
    });
  print('Call done at', Date.now()-time0, 'ms');
}

function ping_ssl_noca() {
  print();
  print('SSL without CA check');
  time0 = Date.now()
  Shelly.call('HTTP.GET', { 
      url: 'https://echo.free.beeceptor.com/',
      ssl_ca: '*'
    }, 
    function(result) {
      print('Result received at', Date.now()-time0, 'ms');
      ping_nossl();
    });
  print('Call done at', Date.now()-time0, 'ms');
  }

function ping_nossl() {
  print();
  print('No SSL');
  time0 = Date.now()
  Shelly.call('HTTP.GET', { 
      url: 'http://echo.free.beeceptor.com/'
    }, 
    function(result) {
      print('Result received at', Date.now()-time0, 'ms');
    });
  print('Call done at', Date.now()-time0, 'ms');
}

ping_ssl_ca();

PS. I had submitted this post already yesterday - today the post and my account were gone. The forum was also offline this morning. Was there an outage and my sign-up and post were lost?