After rebasing my test-suite branch, I noticed some PDF tests getting noticable slower. I pinpointed it to this PR: #7326

This specific test now takes up twice the amount of time:

--- gradient-math-misc ---
// Test miscellaneous
#show math.equation: set text(fill: gradient.linear(..color.map.rainbow))
#show math.equation: box

$ hat(x) = bar x bar = vec(x, y, z) = tilde(x) = dot(x) $
$ x prime = vec(1, 2, delim: "[") $
$ sum_(i in NN) 1 + i $
$ attach(
  Pi, t: alpha, b: beta,
  tl: 1, tr: 2+3, bl: 4+5, br: 6,
) $

The gradient code in typst-pdf generates 31 samples between every stop of a gradient. Since the rainbow gradient already has a lot of stops, this seems to be the culprit. Maybe we can choose the number of samples based on the distance of the stops and or distance of the hue instead? In the rainbow case I think it would be fine to basically omit any extra sampled stops.