This class computes the SARL Experience Index (SEI) of your machine.

The SEI is inspirated by the Windows Experience Index. The SEI measures the capability of your computer's hardware and software configuration and expresses this measurement as a number called a base score. A higher base score generally means that your computer will perform better and faster than a computer with a lower base score.

Global Base Score

The base score is a value between 1.0 and 5.9. The base score is based on the sub scores of sub components.

The model logic is tolerant of one subscore being below the threshold for a particular level by 0.1. For example, assume that in the above example, the memory score was 4.0 and the processor score 3.9. This would mean that the processor score would marginally be the only item keeping the base score below level 4. The model addresses this issue by rounding up a single value that is below the next round level by 0.1.

After the sub scores are normalized, the global base score is the average score of the sub components.

CPU Score

The CPU score was created to measure the processor performance when tasked with common Janus usage activities. The processor is assessed on the following items:

1. Compression and decompression using the Zip compression algorithm
2. Encryption and decryption assessment
3. Arithmetic Operations

The results are normalized and weight averaged in order to arrive at the final CPU sub score.

Memory Score

The memory score measures the bandwidth of moving data into and out of memory in Mega Bytes per Second. The higher the bandwidth, the better the memory. Not having enough memory is a limiting factor on performance. As a result, the amount of memory in the system constrains the score value. The amount of memory limits are:

Memory Scores

Amount of memory	Highest possible score
64 MB or less	1.0
Less than 128 MB	2.0
Less than 256 MB	3.0
Less than 512 MB	4.0
Less than 1 GB	5.0

Disk Score

The disk score measures disk bandwidth (in Mega Bytes per Second). The conversion to an index number is set up in a way that all modern disks will score at least 2.0.