Re: [Boost-users] cache basics

From: Cory Nelson (phrosty_at_[hidden])
Date: 2007-03-17 03:18:57

On 3/16/07, Gottlob Frege <gottlobfrege_at_[hidden]> wrote:
> I had an idea for a general cache, based on the idea that caches are
> essentially trying to avoid re-calling expensive functions with the
> same parameters as last time.  So typically you build a cache key from
> the params, put it in a map, etc.  But what if we did things slightly
> differently...
>
> <snip>
>
> Basically, instead of building a key from the params, build a key from
> the params + the function that takes the params.  Then, as a bonus,
> you don't need to worry about packing/unpacking the params - just let
> bind() do that for you!  The other bonus is that you can cache things
> that may be created via different methonds.
>
> So what's the problem?
>

Other than what you specify, it sounds like the memory overhead on
that will be very high, something you don't exactly want in a cache.
I think a generic cache that could use anything from functions to
strings to integers as keys would be preferable.

>
> - Tony
>

-- 
Cory Nelson
http://www.int64.org