2765 - shouldn't load all alternate stylesheets before displaying

Status: VERIFIED FIXED

(Core :: CSS Parsing and Computation, defect, P2)

Description

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

You currently display the document without any stylesheets, then load all
stylesheets, whether used or not, and then reflow when they are all loaded.  It
would probably be better to load the ones that are to be used first, and then
(if you want) pre-load the alternates.  It's very slow to load 3 stylesheets
when you only need one.

Additionally, if you start loading another link while the stylesheets are
loading, the stylesheet loading should be stopped.  It isn't.

(I do like the idea of displaying first without the stylesheet.  And yes, I am
currently testing over a modem.)

Comment 1

[leger]

Setting all current Open/Normal to M4.

Comment 2

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Actually, I think you shouldn't load alternate stylesheets until they are
requested, for the following reasons:

1) It uses bandwidth
2) It messes up hit-counting, which drives webmasters crazy
3) It slows down anything else the user may be doing (telnet, etc.)
4) Because of (3), it discourages the use of alternate stylesheets.

Comment 3

[Hixie (not reading bugmail)]

This bug will probably be fixed by Peter forthcoming stylesheet manager class.
Related bugs: bug 2029, bug 2765, bug 3421, bug 4529.

To find related bugs, search the description field for the [SSMC] marker.

Comment 4

[Hixie (not reading bugmail)]

See also bug 5318.

Comment 5

[Peter Linss]

We now defer loading alternate sheets until all other sheets have loaded.

Comment 6

[Christine Hoffman]

Verified fixed using 6/14 Apprunner. Stylesheets loading is immediate.