That picture show's the surface more 'normal' looking than what I would have thought. Rocks strewn about. Looks to be dust covered. It will be very interesting to hear what the scientists learn from this. Wow - another moon landing. (Just not the Moon.)
I did one time work on a project where the STL classes caused a significant performance hit to the software for certain operations (on one partcular CPU architecture). In this particular spot in the source, the container and iterator code was hand written to avoid the performance hit.
Don't assume that the STL code will be the most efficient ALL the time.
Re:Hardware resources and software design
on
Where's My 10 Ghz PC?
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· Score: 3, Informative
Hogwash! Write first, optimize later...or in the real world: write first, optimize if the customer complains.
Supposing that you need that first sale of your system to a customer, and when they demo your software, they see it's so slow that they dismiss it and buy the competitor's product. You don't have a second chance. This actually happened with a company I know of. The company pretty much went tits up because the architect neglected performance.
Even then, what are the chances that I can write a better sorting algorithm than one included in a standard library that was written by some who studied sorting algorithms?
I don't necessarily need to write the sort algorithm, but I need to be concerned with the effect of using the various algorthms on my system and select the corrrect one accordingly.
Again, that company that failed went with using a standard library for some functionality in the product instead of rolling their own and this had disasterous results. After the customer complained about performance, they found that they'ld need to completely redesign a significant portion of the product to correct the problem. It wasn't a two or three day fix. The fix would have taken 1-2 months. Try eating that cost when you're a small company.
To get the economies of scale needed to provide cheap veggie burgers, a lot more people would need to want to eat veggie burgers.
I'ld bet you'ld see a lot more people eating veggie burgers if they were say 3/4 the price of regular burgers rather than 2-3 times the price, myself included. They're probably healthier for you , but I really can't justify the cost difference to buy them.
You're quite probably right when stating that grandpa's organic foods were more expensive than today's organic foods. But then, great-grandpa probably was a farmer and grew/raised most of his own food. No out of pocket costs for him whatsoever, only labour.
I too have been bitten by this bug too often to casually use unsigned. The problem is that one tends to forget about needing to be extremely careful when doing calculations with unsigned. I almost always use signed numbers, even when their value is always supposed to be a nonnegative number.
A good rule of thumb: don't use unsigned numbers unless you know you need that extra bit and you've double checked to make sure there are no negative intermediate results in your calculations, and have adequately commented code to warn others of the use of unsigned variables so they are aware of the potential for this problem if they need to make changes to the code.
It's usually better just to use a long instead of an unsigned int or an int instead of an unsigned short.
The RS-68 engines were developed new for the Delta IV series of rockets. The Delta IV series is several years old now. They aren't new for this particular version of the Delta IV, the Delta IV Heavy.
Interesting. I had been wondering if there had been some malfunction with one of the first stage boosters that caused the computers to shut the stage down early.
It seems like the Ariane-5 and the Delta IV-Heavy have similar payload capacities. I'm wondering which one will be cheaper to launch. The Ariane-5 uses solid boosters, which makes me think that that system may be cheaper to launch. But then again, the first stage of the Delta IV-Heavy is 3 identical LH2 - LOX boosters, and the reduction in the number of unique parts may make that system lses costly to launch.
At 650,000 lbs of thrust those boosters are pretty powerful for liquid fueled engines.
"2) We here in Indiana still dont have Daylight Savings Time. If we switch to 10 hours days, how are the cows going to know when to sleep?"
Maybe the old cows could just go on using the clocks they currently use. The new cows you could always teach to read the new clocks and get them new 10 hour clocks.
I think the reason they don't use DST in Indiana is because there's no one there that knows how to use DST and they'ld have to hire people in from out of state to teach the cows how to read the new DST clocks. Teaching the cows should be fairly easy. Teaching the people in Indiana how to read DST clocks, well that's another story.
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That picture show's the surface more 'normal' looking than what I would have thought. Rocks strewn about. Looks to be dust covered. It will be very interesting to hear what the scientists learn from this. Wow - another moon landing. (Just not the Moon.)
I'm sorry boys, no dinner this evening. We had to use the oven to bake a satellite for NASA.
From what I've just read (9:40 EST), Huygens has successfully landed. Rah!
When will apples have dual cores?
A: A dual core opteron.
I live in rural North Dakota. Wonder how much I could get for renting my forehead?
Better example may have been creating two mpeg video streams at once.
Correct. I estimated that the program should have been at least 80% as fast as its competitors. It was only 20% as fast (5 times slower).
In my estimation - the same amount of time, possibly a week less.
Don't assume that the STL code will be the most efficient ALL the time.
Supposing that you need that first sale of your system to a customer, and when they demo your software, they see it's so slow that they dismiss it and buy the competitor's product. You don't have a second chance. This actually happened with a company I know of. The company pretty much went tits up because the architect neglected performance.
Even then, what are the chances that I can write a better sorting algorithm than one included in a standard library that was written by some who studied sorting algorithms?
I don't necessarily need to write the sort algorithm, but I need to be concerned with the effect of using the various algorthms on my system and select the corrrect one accordingly.
Again, that company that failed went with using a standard library for some functionality in the product instead of rolling their own and this had disasterous results. After the customer complained about performance, they found that they'ld need to completely redesign a significant portion of the product to correct the problem. It wasn't a two or three day fix. The fix would have taken 1-2 months. Try eating that cost when you're a small company.
It looks kind of like the word Torino, which was some kind of car in the early 70's I think, and may be some Spanish word.
Are there any other major brands besides HP pavilion that use AMD chips in their laptops?
9% market shareis about what I'ld expect though.
AMD needs to break in to designs that provide a good CPU power/Electrical power ratio.
I'ld bet you'ld see a lot more people eating veggie burgers if they were say 3/4 the price of regular burgers rather than 2-3 times the price, myself included. They're probably healthier for you , but I really can't justify the cost difference to buy them.
You're quite probably right when stating that grandpa's organic foods were more expensive than today's organic foods. But then, great-grandpa probably was a farmer and grew/raised most of his own food. No out of pocket costs for him whatsoever, only labour.
anything like the infamous IBM deathstar.
I know. It was factory applied on my old car, unbeknownst to me. Arrrggghhh!!
That's not fair. You're in an earlier time zone.
Not if it's Starbuck's
A good rule of thumb: don't use unsigned numbers unless you know you need that extra bit and you've double checked to make sure there are no negative intermediate results in your calculations, and have adequately commented code to warn others of the use of unsigned variables so they are aware of the potential for this problem if they need to make changes to the code.
It's usually better just to use a long instead of an unsigned int or an int instead of an unsigned short.
YOu weren't ready for it yet. You hadn't developed the intellectual capacity.
The RS-68 engines were developed new for the Delta IV series of rockets. The Delta IV series is several years old now. They aren't new for this particular version of the Delta IV, the Delta IV Heavy.
It seems like the Ariane-5 and the Delta IV-Heavy have similar payload capacities. I'm wondering which one will be cheaper to launch. The Ariane-5 uses solid boosters, which makes me think that that system may be cheaper to launch. But then again, the first stage of the Delta IV-Heavy is 3 identical LH2 - LOX boosters, and the reduction in the number of unique parts may make that system lses costly to launch.
At 650,000 lbs of thrust those boosters are pretty powerful for liquid fueled engines.
Six nines? Hell, if they managed two nines they'ld be doing way better than the Space Shuttle.
I give that idea the big 4.
Maybe the old cows could just go on using the clocks they currently use. The new cows you could always teach to read the new clocks and get them new 10 hour clocks.
I think the reason they don't use DST in Indiana is because there's no one there that knows how to use DST and they'ld have to hire people in from out of state to teach the cows how to read the new DST clocks. Teaching the cows should be fairly easy. Teaching the people in Indiana how to read DST clocks, well that's another story.