The SmartScan GenCRCDiff is a high CPU and Disk I/O consuming action that is why we recommend using Core 2 Duo processor for SmartScan Mode. You can refer to page 42 of this document
for the system requirements.
SmartScan has a throttling mechanism for CPU usage for GenCRCDiff, but it only works for non-hyper thread (low-level) machines. The default value is 60, which means that SmartScan-related processes cannot use CPU over 60%.
Below are some rough data for reference:
- For Core 2 Duo processor, high level machine, it takes 1~2 minutes CPU high (only one core) to generate diffs.
- For P4 2.0G non-hyper thread low level machine, it takes 11~13 minutes 60% CPU usage to generate diffs.
- For middle level machine spec, it takes time and CPU usage in between.