看到「That time Larry Ellison allegedly tried to have a professor fired for benchmarking Oracle」這篇文章的講古，想起很久前就有聽過 Microsoft 有這樣的條款 (禁止未經原廠同意公開 benchmark 結果)，原來是 Oracle 在三十幾年前創出來的？而且這種條款還有專有名詞「DeWitt Clauses」，出自當初被搞的教授 David DeWitt...
You may not disclose the results of any benchmark test … without Microsoft’s prior written approval
You may not disclose results of any Program benchmark tests without Oracle’s prior consent
IBM 的反而在 license 裡面直接允許：
Licensee may disclose the results of any benchmark test of the Program or its subcomponents to any third party provided that Licensee (A) publicly discloses the complete methodology used in the benchmark test (for example, hardware and software setup, installation procedure and configuration files), (B) performs Licensee’s benchmark testing running the Program in its Specified Operating Environment using the latest applicable updates, patches and fixes available for the Program from IBM or third parties that provide IBM products (“Third Parties”), and © follows any and all performance tuning and “best practices” guidance available in the Program’s documentation and on IBM’s support web sites for the Program…