Here is the performance stats of the solution by imho for TSQL Challenge21.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | May 26 2010 2:54PM | 1139878 | 590 | 6568 | 7.013 |
| 2 | May 26 2010 3:59PM | 1139878 | 590 | 6677 | 8.695 |
| 3 | May 26 2010 4:59PM | 1139878 | 590 | 6302 | 6.548 |
| 4 | May 26 2010 5:47PM | 1139878 | 590 | 6318 | 6.575 |
| 5 | May 26 2010 6:35PM | 1139878 | 590 | 6333 | 6.608 |