In graphic rendering, why is stroke width 2.0 considerably slower than stroke width 1.0?

[MarginGitHub]

In my use case, there is a large number of trajectory points to be rendered. I noticed that setting the stroke width to 2 results in significantly slower rendering speed compared to setting it to 1. I tried disabling anti-aliasing, but still couldn’t achieve the same performance as with the stroke width set to 1.

[RazrFalcon]

tiny-skia has two stroke renders: regular (path outline + fill) and hairline. Hairline is triggered when a stroke width is <= 1.

As for performance, I don't think there is anything you can do about it.