Feditext beta users: today's build 79 includes the new "Siren" HTML parser, which is 3-6× faster than the current WebKit parser for the text formatting used in Fediverse posts. this should result in smoother scrolling for many users.
Siren is experimental, even more so than Feditext betas in general, so by default, it's off. to opt into Siren, open Feditext's preferences, scroll all the way to the end, select Siren from the "HTML parser" dropdown (instead of WebKit), and press the "Apply new HTML parser" button below it.
notes:
do not switch parsers while writing a post: you will lose the post.
the HTML parser is an app-wide setting, and can't be configured on a per-account basis.
if you have issues with Siren, you can revert to WebKit from the same menu.
known issues that you don't need to report:
blockquote lower vertical margins may be too big, causing the end of a blockquote's background rectangle to appear under the next normal paragraph. (however, the indents are still correct, so non-quoted text will not be indented.) this is related to https://github.com/feditext/feditext/issues/48 and https://github.com/feditext/feditext/issues/164 but is (currently) worse in Siren.
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