Loading of aui.css in IE11 takes 18 seconds. Loads multiple times.

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: 7.0.0 DXP SP2, Master
• Fix Version/s: None
• Component/s: ~ [Archived] Frontend Infrastructure, ~ [Archived] Themes Infrastructure
• Labels:
  • ee-ts
• Story Points: 0.25
• Browsers:
  Internet Explorer 11

From: https://web.liferay.com/community/forums/-/message_boards/view_message/83076456

I've got a Liferay DXP with an empty portal-ext.properties and a custom empty theme too (empty main.js and empty _custom.scss, default *.ftl files).

My problem is that only in IE11, every time I browse my portal pages, I have to wait 18 seconds per page to have aui.css loaded.

On Chrome or Firefox I have to wait that time only the first time when I start the Tomcat server: after that first load (where, I guess, caches are stored somewhere), calling every page takes few milliseconds...but in IE11 I have to wait 18 secs at every page change!

aui.css is called by IE11 three times, with different parameters:

/o/my-theme/css/aui.css?browserId=ie&themeId=my_WAR_mytheme&minifierType=css&languageId=en_US&b=7010&t=37
/o/my-theme/css/aui.css?browserId=ie&themeId=my_WAR_mytheme&minifierType=css&languageId=en_US&b=7010&t=37&zx=nmj3emxb06t7
/o/my-theme/css/aui.css?browserId=ie&themeId=my_WAR_mytheme&minifierType=css&languageId=en_US&b=7010&t=37&zx=yd9spllwuolv

The last one every time takes so long.

This problem seems to be related to font awesome load inside the font-awesome.scss file:

my-theme
└── src
    └── css
        └── aui
            └── lexicon
                └── fonts
                    └── alloy-font-awesome
                        └── scss
                            └── font-awesome.scss

Its content is the following (bootstrap import is commented by default, I don't know why):

@import "variables";
@import "mixins-alloy";
@import "path-alloy";
@import "core";
// // @import "bootstrap";
@import "extras";
@import "icons-alloy"; // Issues here!
@import "icons-alloy-extra";

If I comment out the "icons-alloy" import, the problem disappears, but I need font awesome because I use them in my theme.