In terms of performance impact, there could be measurable improvements, depending on how the site was structured and hosted. This [try push](https://treeherder.mozilla.org/jobs?repo=try&tier=1%2C2%2C3&revision=35b695d17ef795193664c2187c57c6f88d2f8770) adds a series of url classification markers including one, `[UrlClassify] WaitTime` that reports how long we waited for classification. On www.apple.com I see a series of first party critical resources like .css and fonts that generally wait a few ms, up to 6ms for the longest one. Not huge delays individually, but in total it's adds up. https://share.firefox.dev/4ck3zez
Bug 2030021 Comment 6 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
In terms of performance impact, there could be measurable improvements, depending on how the site was structured and hosted. This [try push](https://treeherder.mozilla.org/jobs?repo=try&tier=1%2C2%2C3&revision=35b695d17ef795193664c2187c57c6f88d2f8770) adds a series of url classification markers including one, `[UrlClassify] WaitTime` that reports how long we waited for classification. On www.apple.com I see a series of first party critical resources like .css and fonts that generally wait a few ms, up to 6ms for the longest one. Not huge delays individually, but in total it adds up. https://share.firefox.dev/4ck3zez