Plank's animations are not smooth and one cannot use 'nice' to fix it

[ALinuxUser]

At least on my system - a ThinkPad X1 with a quad-core and Intel graphics - Plank's icon scaling animations are jerky. I had thought to try to fix the problem by setting Plank's 'niceness' (using an autonice daemon) to a negative number. Yet, I believe that so doing gives the same niceness to . . anything that Plank launches (!).

Plank 0.11.89 (installed, i think, via PPA)
Linux Mint 21.0 Cinnamon
Intel graphics, running Mesa

$ apt list xorg*
Listing... Done
xorg-dev/jammy,jammy 1:7.7+23ubuntu2 all
xorg-docs-core/jammy,jammy,now 1:1.7.1-1.2 all [installed]
xorg-docs/jammy,jammy 1:1.7.1-1.2 all
xorg-server-source-hwe-18.04/jammy 3:14.6 amd64
xorg-server-source/jammy-updates,jammy-updates 2:21.1.3-2ubuntu2.4 all
xorg-sgml-doctools/jammy,jammy,now 1:1.11-1.1 all [installed,automatic]
xorg/jammy,now 1:7.7+23ubuntu2 amd64 [installed]
xorgxrdp/jammy 1:0.2.17-1build1 amd64