Startup Doubler 1.0 is a shareware program that in theory speeds up boot time by creating a secondary level disk cache. The author of the program says the following -
And claims the following -
Below you will find my stopwatch test on a Performa 6300 theoretically the type of machine the program was designed for (a machine with a slow hard drive). Tests were performed several times with both standard set of extensions and also a more extensive set of extensions and control panels. Test system was OS 8.
Startup Doubler has a 15 day free trial period so you can download it and see if you get better performance out of it on your machine than I did on mine. I experienced no compatibility problems with it during it's brief stay on my machine.