Issue with /wp-admin/admin-ajax.php loading too long

Using HurryTimer’s recurring timer which makes https://mysite.com/wp-admin/admin-ajax.php to load in 5.53s

Any suggestion to fix this?

Post

nonce=34cfb795b1&timestamp=1603918698286&cid=2060&action=hurryt%2Fupdate_timestamp

Response
-1

Headers
Response Version – HTTP/1.1
Date: Wed, 28 Oct 2020 13:29:52 GMT
Server: Apache
X-Powered-By: PHP/7.3.23
Access-Control-Allow-Origin: https://mysite
Access-Control-Allow-Credentials: true
X-Robots-Tag: noindex
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
Referrer-Policy: strict-origin-when-cross-origin
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Cache-Control: no-cache, must-revalidate, max-age=0
Set-Cookie: stl_script=lat; expires=Thu, 28-Jan-2021 13:29:57 GMT; Max-Age=7948800; path=/
X-Powered-By: PleskLin
X-XSS-Protection: 1; mode=block
X-FRAME-OPTIONS: SAMEORIGIN
X-Content-Type-Options: nosniff
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 22
Keep-Alive: timeout=15, max=98
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8

Request Version – HTTP/1.1
Host: mysite.com
Connection: keep-alive
Content-Length: 82
Accept: */*
Origin: https://mysite.com
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Referer: https://mysite.com/
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Cookie: _ht_CDT-2060=1603918698286

• This topic was modified 3 years, 5 months ago by seoenergy.
• This topic was modified 3 years, 5 months ago by seoenergy.
• This topic was modified 3 years, 5 months ago by seoenergy.