[R] hash argument of new.env()

[Robert Gentleman]

As Peter said,
  hashing tends to be effective if
   1) you have lots of things (most R environments in practice have
  very few objects so hashing is not so important, but for base it
  is).
   2) you access them individually. If for example you will always
  apply some operation to all the objects (or even most, I think) then
  a hash table doesn't really help and can hurt.

  But for some operations (especially in comp. bio.) they are very
  helpful and substantially reduce the time used to do lookups.



On Tue, Oct 08, 2002 at 11:58:24AM +0100, Jonathan Rougier wrote:
> Hi everyone,
> 
> There is no mention in ?new.env (R-1.6.0) of what the effect of setting
> the hash argument of new.env() actually does.  What does it mean in
> performance terms to say that "the environment will be hashed"?
> 
> Thanks, Jonathan.
> -- 
> Jonathan Rougier                       Science Laboratories
> Department of Mathematical Sciences    South Road
> University of Durham                   Durham DH1 3LE
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