Measure and tweak doRandomChangesToWOT() performance:
- Increase the probability of trust value change to ~46%. On-network WOT databases have shown to contain ~150 000 trust values with only ~6000 identities, so trust values are the things which users create the most. Also, creation of trust values uses less CPU than creation of own identities.
- Measure the average execution time of each type of event
- Division by zero does not seem to be a problem, it will consider the double as "NaN" instead of throwing.