PlsiBackend, the continuously-running, distributed LSI++ backend server, also performed well during the tests. Although the time to search each document collection was improved by using several processors rather than a single processor, the larger document collections like CCE and USENET benefited the most from parallelism. Also, the timings demonstrated that adding more processors to the smaller collections generally did not have a significant effect, but larger collections were able to take advantage of the greater parallelism and decrease the overall search time.