Fun fact: for 2D graphic workloads software rendering on framebuffer device is the fastest option on almost all laptops i have tested xschem on. The only exception is the little Samsung N220 due to the slow and tiny Atom N450 CPU. Framebuffer graphics is also the most precise and reliable since the X11 specification has exact rules for pixelization/rasterization of primitives. All drawings are exactly identical down to the pixels on any machine using fbdev. Following table summarizes the test times for a xschem BIST routine, doing lot of graphic (among other) operations. Video shows the testing (OS: Devuan/testing, Arch: amd64)

HOST	            CPU	                     GPU	                    X11 Driver	  Test time [s]
====================================================================================================
Asus f556U	        Intel core i7-7500U	     Intel HD 620	            fbdev	      19.8 -best-
Asus f556U	        Intel core i7-7500U	     Intel HD 620	            modesetting	  28.7
Asus f556U	        Intel core i7-7500U	     Intel HD 620	            intel	      20.6
				
Samsung N220	    Intel Atom N450	         Integrated N450	        fbdev	      96.5
Samsung N220	    Intel Atom N450	         Integrated N450	        modesetting	  N/A
Samsung N220	    Intel Atom N450	         Integrated N450	        intel	      95.0 -best-
				
Samsung R540	    Intel Core i3 M 380	     AMD/ATI Radeon HD 54xx	    fbdev	      31.9 -best-
Samsung R540	    Intel Core i3 M 380	     AMD/ATI Radeon HD 54xx	    modesetting	  64.3
Samsung R540	    Intel Core i3 M 380	     AMD/ATI Radeon HD 54xx	    radeon	      32.3
				
HP Pavilion DV6000	Intel Core Duo T5450	 NVIDIA GeForce 8400M GS	fbdev	      41.5 -best-
HP Pavilion DV6000	Intel Core Duo T5450	 NVIDIA GeForce 8400M GS	modesetting	 216.1
HP Pavilion DV6000	Intel Core Duo T5450	 NVIDIA GeForce 8400M GS	nouveau	      41.6