RE the 1.2ch usage being inherently expensive/problematic (per comment 11 and 12) -- it looks like the source for that is here: https://github.com/rust-lang/rust/blob/f66e4697ae286985ddefc53c3a047614568458bb/src/librustdoc/html/static/rustdoc.css#L898 Perhaps worth submitting a pull request to suggest a trivial replacement?
Bug 1516780 Comment 17 Edit History
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RE the 1.2ch usage being inherently expensive/problematic (per comment 11 and 12) -- it looks like the problematic line of CSS lives here in the rust source tree: https://github.com/rust-lang/rust/blob/f66e4697ae286985ddefc53c3a047614568458bb/src/librustdoc/html/static/rustdoc.css#L898 Perhaps worth submitting a pull request to suggest a trivial replacement?