For simplicity in understanding the performance variations, the graph is divided into two parts The first one (above) is for number of records upto 100,000 and the second one (below) for number of records from 100,000 upto 500,000.
It is interesting to note that PowerIndex's performance is very consistent and just took less than Half Second to complete 500,000 insert operations. This performance holds TRUE for all basic CRUD operations.
Programming for PowerIndex is very simple. Its Pure Java.
Click on the following link to download the User Guide.