[Jprogramming] Aiming at a multi-core future

[Don Guinn]

If I am in a situation where I am forced to assume an order of execution I
avoid using "each" or anything that might allow either parallel execution or
possibly reorder the execution at sometime in the future. I am even a little
nervous about using "for." as it at some time in the future it might do some
reordering.

I am a little concerned about the practice of using @: as a performance
improvement over @ . To me @: is a way for me to tell the interpreter that I
do not want parallel execution. And using @ means I will allow parallel
execution if it ever exists.