Here is the performance stats of the solution by dave ballantyne for TSQL Challenge19.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | May 8 2010 12:16AM | 44147 | 1 | 327 | 0.994 |
| 2 | May 8 2010 12:32AM | 44148 | 0 | 390 | 0.709 |
| 3 | May 8 2010 12:49AM | 44148 | 0 | 374 | 0.596 |
| 4 | May 8 2010 1:06AM | 44148 | 0 | 312 | 0.543 |
| 5 | May 8 2010 1:23AM | 44148 | 0 | 390 | 0.526 |