[jfx21u] RFR: 8322795: CSS performance regression up to 10x

[Johan Vos]

8322795: CSS performance regression up to 10x

-------------

Commit messages:
 - Backport 1dff7a1618a945a9a10ad2168f78aad3658e91a9

Changes: https://git.openjdk.org/jfx21u/pull/54/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx21u&pr=54&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8322795
  Stats: 6 lines in 1 file changed: 2 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jfx21u/pull/54.diff
  Fetch: git fetch https://git.openjdk.org/jfx21u.git pull/54/head:pull/54

PR: https://git.openjdk.org/jfx21u/pull/54