We have SharePoint Online Tenant with classic features. We have not customised anything on https://domain.sharepoint.com and it is a classic team site as shown in picture.
Page is loading very slow in Internet Explorer but in Google chrome it works fine. when i try to use Developer Tool in IE i have found CoreV15 and QCB.css is loading twice and second load is coming from an XMLHttp request which holds the page for few seconds. I understand from other articles that theming.js will be calling again corev15.css internally from the code.You can see even corev15.css is coming from Disk it takes more than 5 second to get the response.
can anybody had the same issue earlier. do i need to change some global settings or something related to the Browser. any kind of suggestion is appreciated.
Addition information- system is Window7 with 4 GB RAM and governed by Corporate Policy.