Tcl tests:

-Loading byte compiled files vs. loading the source code.
(Us paupers who can't afford Tcl pro might like to know.)
-Regexp speed.
-Other string manipulation.
- source speed (including encodings)
- package require
- 'unknown' command processing
- binary string performance
- socket speed
- bytecode compiler speed

Tk tests:

- loading B/W GIFs
- loading color GIFs
- loading transparent GIFs
- Tk rendering of *lots* of widgets
- Tk manager comparison pack/grid/place
- Tk event response time
- Tk menu performance
- Tk command dispatch
- Tk commands with and without % substitutions
- Tk widget specific performance
  - canvas create/move/find/scale
  - text insert/delete/get/scan/see
  - tag operations for widgets with items
- Tk font operations

Other stuff:

- Create a generic framework
- Format results in a comparative table
- Make tests run more/less often on faster/slower machines
