review of std.parallelism

[dsimcha]

On 3/19/2011 12:03 PM, Andrei Alexandrescu wrote:
>
> * "workUnitSize: The number of elements to evaluate in a single Task.
> Must be less than or equal to bufSize, and in practice should be a
> fraction of bufSize such that all worker threads can be used." Then why
> not specify a different parameter such a multiplier or something? The
> dependence between bufSize and worUnitSize is a sign that these two
> should be improved. If you have good reasons that the user must have the
> parameters in this form, give an example substantiating that.

I did this for consistency with all the other functions, where work unit 
size is specified directly.  I don't want lazyMap to be the oddball 
function where it's specified in a completely different way.