pickle.load() extremely slow performance

[Jim Garrison]

Steve Holden wrote:
> Jean-Paul Calderone wrote:
>> On Mon, 23 Mar 2009 10:57:54 -0500, Jim Garrison <jhg at acm.org> wrote:
>>> Benjamin Peterson wrote:
>>>> Terry Reedy <tjreedy <at> udel.edu> writes:
>>>>> 3.1a1 is out and I believe it has the io improvements.
>>>> Massive ones, too. It'd be interesting to see your results on the alpha.
>>> On 3.1a1 the unpickle step takes 2.4 seconds, an 1875% improvement.
>> Surely you mean a 94.7% improvement?
>>
> Well, since it's now running almost twenty times faster, the speed has
> increased by 1875%. Not sure what the mathematics of improvement are ...
> 
> regards
>  Steve
The arithmetic depends on whether you're looking at time or
velocity, which are inverses of each other.

If you double your velocity (100% increase) the time required goes
down by 50%.  A 1000% increase in velocity results in a 90% decrease
in time... etc.  I guess I equate "performance" to velocity.