1332961 - Layout is extremely slow on rustdoc source listings

Status: RESOLVED DUPLICATE of bug 1288938

(Core :: Layout, defect)

Description

[Simonas Kazlauskas [:nagisa/:simukis]]

Attachment: The offending page

Originally reported in the Rust repository[1].

[1]:https://github.com/rust-lang/rust/issues/39240#issuecomment-274366421

The layout of source code listings generated by rustdoc (sample attached) is extremely slow on Firefox.

If the `font-family` rule on line 130 of rustdoc.css is removed, the page layouts quickly.

> code, pre {
>    font-family: "Source Code Pro", Menlo, Monaco, Consolas, "DejaVu Sans Mono", Inconsolata, monospace;
>    white-space: pre-wrap;
> }

Does not reproduce on a Webkit browser.

Comment 1

[Xidorn Quan [:xidorn] UTC+10]

I cannot reproduce this on Firefox Developer Edition. I guess it is a dup of bug 1288938 (and thus would be fixed in the next release). Could you confirm that it doesn't appear on Beta or DevEdition?

Comment 2

[Simonas Kazlauskas [:nagisa/:simukis]]

I will try to re-reproduce this once the fix rides the trains to stable. Hoping needinfo reminder will fire in a timely manner :)

Comment 3

[rodododouk]

I raised the original issue on github - I've tried on firefox hg repo and I don't get the issue. Is it worth leaving this issue open until it lands in firefox stable, to avoid more duplicates?

Comment 4

[Xidorn Quan [:xidorn] UTC+10]

No. In general, we close bugs when they get fixed in mozilla-central (that is, where the Nightly from). So let's mark it duplicate of bug 1288938.

Comment 5

[Bobby Holley (:bholley)]

That fix landed in FF51, so it should be in Firefox Release by now. Please reopen the bug if it doesn't appear to be fixed.