This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
John Link charted some comparisons in 1991 involving nine setups: no-TWGS, and 7, 8, 9, 10mHz boards before and after the 8kB-to-32kB cache upgrade. He used three benchmarks: 1. time to calculate page breaks in a 218-page Appleworks document 2. time to scroll through a 39-page Awks-GS document 3. time to compile 4800 lines of MD-BASIC source code For a 7mHz 8kB TWGS, the speed gain for the 32kB cache upgrade is roughly 33% to nearly x2.5 plain GS speed. For a 10mHz 8kB TWGS, the speed gain for the 32kB cache upgrade is roughly 33% to about x3.25 plain GS speed. His charts shows that a 7mHz TWGS with the 32kB cache performs slightly better than a 10mHz TWGS with 8kB cache on tests 1 and 3; it is a bit slower on test 2. ----------------------------