Welcome to the Rockbox Technical Forums!
Let me know if this is at all useful.
When I "test" performance I usually leave the settings just the way I am normally using rockbox, "No side-effects" is an utopia anyway
The best solution would be to create a WPS that reports the boost ratio directly on screen! I have no idea if this is possible or not but a true TEST.wps (rwps) would rule
Page created in 0.172 seconds with 70 queries.