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Why does Math.round(0.49999999999999994) return 1?
...ts, you should expect the results to differ a bit on various environments (CPU, 32- or 64-bit mode).
And, when using round or inverting matrices, etc., these bits can make a huge difference.
x64 output:
10.5 rounded is 11
10.499999999999998 rounded is 10
9.5 rounded is 10
9.499999999999998 rounde...
What is the purpose of the “Prefer 32-bit” setting in Visual Studio and how does it actually work?
...
Microsoft has a blog entry What AnyCPU Really Means As Of .NET 4.5 and Visual Studio 11:
In .NET 4.5 and Visual Studio 11 the cheese has been moved. The
default for most .NET projects is again AnyCPU, but there is more than
one meaning to AnyCPU now. T...
Tracking the script execution time in PHP
PHP must track the amount of CPU time a particular script has used in order to enforce the max_execution_time limit.
18 A...
Java, How do I get current index/key in “for each” loop [duplicate]
... which won't be able to give you an index.
– Bjørn Vårdal
Aug 2 '17 at 0:25
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What does “async: false” do in jQuery.ajax()?
...lur event with a following sync call blocking it.
– PålOliver
Feb 19 '13 at 10:34
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AtomicInteger lazySet vs. set
...ill see it at the next read, because the cache coherence protocol of intel cpu will garantee LazySet works, but the cache line will be updated at the next read, again, the CPU has to be modern enough.
http://sc.tamu.edu/systems/eos/nehalem.pdf
For Nehalem which is a multi-processor platform, the pr...
How much overhead does SSL impose?
...ources were required; no network hardware, no new hosts. It only increased CPU load by about 1%.
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Catch multiple exceptions at once?
...e as many lines and far less readable.
– João Bragança
Sep 4 '12 at 21:57
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@JoãoBragança: W...
Profiling Django
...he Debug Toolbar made things process. My sql queries were small (30ms) but cpu time was very high (800ms). Another page i was tuning had sql times of 300ms, and cpu time of 8000ms - so i kept trying to find the source of the problem. Turning Django Toolbar off sped things right up. 3 years later, st...
Stack Memory vs Heap Memory [duplicate]
...m C++.
Generally speaking, the stack is preferred as it is usually in the CPU cache, so operations involving objects stored on it tend to be faster. However the stack is a limited resource, and shouldn't be used for anything large. Running out of stack memory is called a Stack buffer overflow. It's...