Hi !
Featured games (91)
games approved by the League of Dukes
Games in Showcase (757)
Games in Android Showcase (229)
games submitted by our members
Games in WIP (844)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Rant about how I hate generics and primitives mixed  (Read 1444 times)
0 Members and 1 Guest are viewing this topic.
Offline K.I.L.E.R

Senior Devvie

Java games rock!

« Posted 2006-03-26 09:14:31 »

Say I have a model with over 2373 vertices.
I would absolutely love to store my vertices in a linked list due to a lot of model files not mentioning their size.

Anyway so far my solution is inelegent and annoying.

In my main loop I do this...

if(this.arrayIdx == this.tmpArray.length)

...because I don't want to do over 2373 casts per primitive type, most models have over 6 types of primitives.
6 * 2373 = 14238 casts if I use an array list or a linked list(prefered in this case).

So lets say I have 64 different entities I needed to cache and all of them are highly detailed(over 2373  vertices) so know we have 14238 * 64 casts , which now makes 911232 casts.

My point?
When will primitives be converted into primitives during runtime and not as (int)((Integer)object)?
Since you are doing 2 casts then the real amount of casting done is double:
911232 * 2 = 1822464.

Surely escape analysis can fix this?
If not when will Sun fix this?

I'm not asking for the entire removal of type erasure in this thread, just remove it when dealing with Java's built in primitives because it is highly embarrasing for Sun to not optimise off their own primitives within collections.

Is there a name for a "redneck" programmer?

Unemployed. Wink
Online Riven

« JGO Overlord »

Medals: 1340
Projects: 4
Exp: 16 years

Hand over your head.

« Reply #1 - Posted 2006-03-26 10:02:51 »

Profile first.

If that is your bottleneck (I seriously doubt it), then create your own:

  • FloatList
  • ByteList
  • IntList
  • WhateverList

Again, I seriously doubt it, as yuo only need the casts at parse-time, after that you can put your data into much more efficient datastructures.

Hi, appreciate more people! Σ ♥ = ¾
Learn how to award medals... and work your way up the social rankings!
Pages: [1]
  ignore  |  Print  

EgonOlsen (75 views)
2018-06-10 19:43:48

EgonOlsen (56 views)
2018-06-10 19:43:44

EgonOlsen (76 views)
2018-06-10 19:43:20

DesertCoockie (256 views)
2018-05-13 18:23:11

nelsongames (155 views)
2018-04-24 18:15:36

nelsongames (155 views)
2018-04-24 18:14:32

ivj94 (896 views)
2018-03-24 14:47:39

ivj94 (157 views)
2018-03-24 14:46:31

ivj94 (809 views)
2018-03-24 14:43:53

Solater (173 views)
2018-03-17 05:04:08
Java Gaming Resources
by philfrei
2017-12-05 19:38:37

Java Gaming Resources
by philfrei
2017-12-05 19:37:39

Java Gaming Resources
by philfrei
2017-12-05 19:36:10

Java Gaming Resources
by philfrei
2017-12-05 19:33:10

List of Learning Resources
by elect
2017-03-13 14:05:44

List of Learning Resources
by elect
2017-03-13 14:04:45

SF/X Libraries
by philfrei
2017-03-02 08:45:19

SF/X Libraries
by philfrei
2017-03-02 08:44:05 is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!