Good examples of value types

[Russel Winder via Digitalmars-d]

On Wed, 2015-05-06 at 02:07 +0000, deadalnix via Digitalmars-d wrote:
> 
[…]
> Let me tell you an actual war story of mine.

I think you need to date the story, and say with GC was being used.

> We have this program that is computationally intensive written in 
> java. Somewhere in the core of the program, we have a LRU cache, 
> with some entries sticking in there, and most entry getting 
> evicted soon enough (typical pareto kind of thing).
> 
> Problem is, all these entries needs to be value types (we are in 
> java) and, by the time things gets evicted from the LRU cache, 
> they have moved to the old generation.
> 
> The whole damn thing generate a ton of garbage.

I suspect this was not using G1 as tons of garbage isn't as much of a
problem compared to CMS, etc.

> The obvious solution is to use value types in the cache, but that 
> not possible. I won't go in the details, but that was a really 
> hard problem to solve, that kept us busy for for longer then it 
> should have because of language limitations.
> 
> Long story short: value types are useful.

This is true anyway no matter which language or GC is being used.

-- 
Russel.
=============================================================================
Dr Russel Winder      t: +44 20 7585 2200   voip: sip:russel.winder at ekiga.net
41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel at winder.org.uk
London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder
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