Tcl 8.4a4
 |-------------------------------------------| 
 | Method          | 10 | 100 | 1000 | 10000 | 
 |-----------------|----|-----|------|-------| 
 | SET             | 21 | 148 | 6777 | 69467 | 
 | APPEND          | 29 | 475 | 7993 | 81514 | 
 | CONCAT          |  9 |  15 |  312 |  5968 | 
 | EVAL/LAPPEND    | 15 |  23 |  393 |  6065 | 
 | FOREACH/LAPPEND | 18 | 369 | 4524 | 44235 | 
 |-------------------------------------------|