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获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
...据读取完毕后，这个的数据就加载完毕了。这里还有一个问题，程序根据这个FAT表的簇号依次读取每个簇，则程序怎么知道一个簇读取完毕后这个文件就算读取完毕了？一般地，每个一个记录值为下列表中值，则说明已经读到文...
Foreign keys in mongo?
...lumns are Fields... Just in case you get mixed up.
– cpu_meltdown
Jun 2 '16 at 13:39
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show 2 more comments
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What is “thread local storage” in Python, and why do I need it?
...created a byte-code chunk that left no room for an interrupt signal to the CPU.
I thought atomic operations are chunks of Python byte code that does not give access to interrupts. Python statements like "running = True" is atomic. You do not need to lock CPU from interrupts in this case (I believe)...
获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
...据读取完毕后，这个的数据就加载完毕了。这里还有一个问题，程序根据这个FAT表的簇号依次读取每个簇，则程序怎么知道一个簇读取完毕后这个文件就算读取完毕了？一般地，每个一个记录值为下列表中值，则说明已经读到文...
A fast method to round a double to a 32-bit int explained
...t-of-order execution, altering the fp rounding mode generally seriales the CPU core and is quite expensive. So on a CPU like a Pentium-III or Pentium-IV, this overall cost is quite high -- a normal fp->int conversion is 10x or more expensive than this add+store+load trick.
On x86-64, however, fl...
API pagination best practices
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memory is cheaper than network/CPU speed. So if creating a page is very expensive (in terms of network or is CPU intensive), then caching results is a valid approach @DeepakGarg
– U Avalos
Mar 26 '18 at 18:49
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Implement C# Generic Timeout
...s no where near as bad as a process running out of control and using every CPU cycle & byte of memory that the PC has. But you are right to point out the potential problems to anyone else who may think this code is useful.
– chilltemp
Nov 19 '08 at 15:37
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How does the new automatic reference counting mechanism work?
...ually decide to look at everything it can find starting from the stack and CPU registers. It will never find A,B1,B2,B3 so it will finalize them and recycle the memory into other objects.
When you use ARC or MRC, and finish with A it have a refcount of 3 (B1, B2, and B3 all reference it), and B1/...
Is Java really slow?
...time compiled programs can't tweak their code in real-time to the specific CPU & system they're running on. JIT provides some very efficient loop transformations this way.
A couple of other historical facts contributed to the "Java is slow" reputation:
Before JIT compilation (Java 1.2/1.3), ...
Difference between JVM and HotSpot?
...ed from the imaginary instruction set to the actual instruction set of the CPU of the host machine. This can be done on-the-fly by an interpreter. Or the bytecode can be fully compiled and cached, to run faster than through the interpreter, in a process known as Just-In-Time (JIT) compiling.
Over th...