Add segment benchmark

Author: ottomated

packages/tailwindcss/src/utils/segment.bench.ts

@@ -0,0 +1,14 @@
+import { bench } from 'vitest'
+import { segment } from './segment'
+
+const values = [
+  ['hover:focus:underline', ':'],
+  ['var(--a, 0 0 1px rgb(0, 0, 0)), 0 0 1px rgb(0, 0, 0)', ','],
+  ['var(--some-value,env(safe-area-inset-top,var(--some-other-value,env(safe-area-inset))))', ','],
+]
+
+bench('segment', () => {
+  for (let [value, sep] of values) {
+    segment(value, sep)
+  }
+})