All Macs In-Depth Tests
CD ROM Acceleration

The graphs below represent a performance comparison between software programs designed to accelerate CD ROM performance. Test were performed on a Performa 6300. Testing was done using MacBench 3.0. For it's CD ROM tests MacBench profiles 5 popular CD ROM based software programs including Encarta Multimedia Encyclopedia, Myst and Passage to Vietnam and applies these profiles to the subsystem being tested. See this description of what MacBench tests and how. Longer bars equals faster performance.

dTime is a disk based caching program. "AF" refers to "Acceleration File" or the size of the disk cache in megabytes. The optimal size of the acceleration file will vary depending on the CD ROM being accessed and the Mix score should be seen as just an example of how size can effect performance. The individual tests give you a more explicit picture of the caching process at work. During the first test the information is written to cache and during the second test the information is drawn from cache. Unexplained is the poor performance during sequential read of small bytes of data which was not true during random read of the same sample size.

**In recent Macworld review CD ROM acceleration software was panned in**
general and dTime in particular. As always it is a good idea to get multiple perspectives when considering a purchase.

CD ROM Acceleration Disk Mix
CD ROM Disk Mix Acceleration at 512 bytes

Sequential Read 512 K

Acceleration at 32K Random Read

Acceleration at 128K Sequential Read

Sequential Read 128K