New submission, run, review and reporting rules established by SPEC/GPC's OpenGL Performance Characterization (OPC) project group have been implemented for the performance results published on this site as of 23 June 1999.
The rules are designed to ensure that results are relevant to end-users. As a result of the new rules and a bug fix to maintain consistency between assigned colors in UNIX and Windows platforms, Viewperf has been revised from version 6.1 to 6.1.1. Viewsets have also increased by one version number. It is believed that performance results reported under Viewperf 6.1.1 should be comparable with those reported under Viewperf 5.0 and later versions, with one exception: The new rules for ProCDRS have necessitated some fairly severe driver changes in some cases, which could mean performance changes for some vendors. It is recommended that performance comparisons for ProCDRS be made based on the latest results found on this web site, or by personalized testing using Viewperf 6.1.1, which can be downloaded on this site.
An excerpt from the OPC project rules regarding general benchmarking philosophy and optimizations can be found on the opc rules page