Plugin loading time is almost 4 sec Slow down my website

Hi There

I am using this plugin on my website but this takes almost 4 sec in the query see below error is found

curl ‘https://demo.virtualclone.in/syi/?wc-ajax=get_refreshed_fragments’ -X POST -H ‘Cookie: PHPSESSID=9bo1jtet1d8f1srro156r4hr31; _ga=GA1.2.1524682780.1542865378; _gid=GA1.2.17029693.1542865378; wpglobus-language-old=en; wpglobus-language=en’ -H ‘Origin: https://demo.virtualclone.in’ -H ‘Accept-Encoding: gzip, deflate’ -H ‘Accept-Language: en-GB,en-US;q=0.9,en;q=0.8’ -H ‘User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36’ -H ‘Accept: */*’ -H ‘Referer: https://demo.virtualclone.in/syi/’ -H ‘X-Requested-With: XMLHttpRequest’ -H ‘Connection: keep-alive’ -H ‘Content-Length: 0’ –compressed

Can someone suggest me how I can get rid of this loading time website is 98% optimized already according to gtmatrix.

Many Thanks

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