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Port Encryption Test Results (sidebar)
The following table shows the results of testing CPU utilization with port encryption, versus without port encryption.
| User Load | Avg Response Time (seconds)* | CPU Utilization without port encryption | CPU Utilization with port encryption | Avg CPU Utilization difference |
| 500 active users | 0.18 | 20% | 30% | 10% |
| 800 active users | 0.18 | 30% | 40% | 10% |
| 1,000 active users | 0.20 | 35% | 45% | 10% |
* Response times varied in the milliseconds range and any difference between CPU utilization with encryption and without encryption was insignificant.
The following screen shows Windows NT performance data for CPU utilization without port encryption. The three spikes correspond to the initial connections of 500, 800, and 1,000 active user sessions. The period between these spikes represents the one-hour test duration.
Figure 1. Graph of CPU utilization without port encryption
The following screen shows Windows NT performance data for CPU utilization with port encryption. Again, the three spikes correspond to the initial connections of 500, 800, and 1,000 active user sessions. The period between these spikes represents the one-hour test duration.
Figure 2. Graph of CPU utilization with port encryption
