please wait
Unions? Why?
Jul 2, 2012 at 1:55pm
So I can kind of see where unions might have been used when computers had 1 MB ram, or less, but this is 2012! 4 GB of ram is pretty much the de facto standard anymore, and actually being kind of low. So why use unions? Or are they ever used anymore?
Jul 2, 2012 at 2:08pmclosed account (z05DSL3A)
| So I can kind of see where unions might have been used when computers had 1 MB ram, or less, but this is 2012! 4 GB of ram is pretty much the de facto standard anymore, and actually being kind of low. So why use unions? |
Jul 2, 2012 at 2:13pm| but anyway do you really want a variant type to be massive just because you have the RAM to fit it in? |
I'm not saying this, but it seems like (I personally haven't used them) that they would lead to a lot of needed book keeping. I guess I just don't see the benefit/use of them.
Jul 2, 2012 at 2:43pm| 4 GB of ram is pretty much the de facto standard anymore, and actually being kind of low. So why use unions? |
That sounds to me like "Why we should safe the tropical rain forest? We have enough oxygen out of there!"
Some of our customer database tables are bigger than 8 GB and some analysis requires to handle with the whole data at once. Outsourcing this data on the HD would be too slow, so we map the structure in memory. I'm really sure our analytical experts are using this "useless" union thing en masse. It's a big difference when an evaluation takes "only" 12 hours instead of 26...
Jul 2, 2012 at 2:51pm
i program micro controllers with only 1Kb of ram ... that is not much and i use unions a lot!
4GB on a pc is standard... true.. but there are more platforms...
4GB on a pc is standard... true.. but there are more platforms...
Jul 2, 2012 at 2:53pm
Ah you misunderstand me. I didn't say it was useless, I just said I personally don't see the use anymore. The database deal makes sense, I guess database entries were paged in and out of memory when needed.
1K sounds really small, even on a microcontroller. What kind of microcontrollers are you working with?
1K sounds really small, even on a microcontroller. What kind of microcontrollers are you working with?
Jul 2, 2012 at 3:01pm Jul 2, 2012 at 3:07pm| Ah you misunderstand me. I didn't say it was useless, I just said I personally don't see the use anymore. |
I see, my mistake ;)
I personally use unions in structures when I'm working with sqlite2 databases. But other use cases I haven't seen yet, too.
Jul 2, 2012 at 4:02pm| 32 bytes of ram |
This is ridiculous haha. What's the ISA look like for something like this?
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