Here is the performance stats of the solution by Ruby for TSQL Challenge23.
| Attempt | Start Time | Reads | Writes | CPU | Duration (Sec) |
| 1 | Jun 17 2010 12:07AM | 238 | 0 | 156 | 0.331 |
| 2 | Jun 17 2010 12:30AM | 238 | 0 | 109 | 0.231 |
| 3 | Jun 17 2010 12:53AM | 238 | 0 | 141 | 0.371 |
| 4 | Jun 17 2010 1:15AM | 238 | 0 | 125 | 0.212 |
| 5 | Jun 17 2010 1:38AM | 238 | 0 | 156 | 0.457 |