大约有 15,000 项符合查询结果（耗时：0.0616秒） [XML]
Quickly find whether a value is present in a C array?
... this doesn't take into account memory delays.
Theory of operation: ARM's CPU design executes most instructions in one clock cycle, but the instructions are executed in a pipeline. C compilers will try to eliminate the pipeline delays by interleaving other instructions in between. When presented wi...
What are copy elision and return value optimization?
...truction and one matching destruction of the copy are omitted, thus saving CPU time, and one object is not created, thus saving space on the stack frame.
share
|
improve this answer
|
...
Please explain the exec() function and its family
...ated with a file block or an entire file.
Process resource utilisation and CPU time consumed is set to zero for the child.
The child also doesn’t inherit timers from the parent.
But what about the child memory? Is a new address space created for a child?
The answers in no. After the fork(), bot...
How to measure time in milliseconds using ANSI C?
...
Doesn't this measure cpu time and not wall time?
– krs013
Feb 1 '15 at 4:53
|
show 1 m...
How to install the Raspberry Pi cross compiler on my Linux host machine?
...torial also supports older Rasperry Pi (A, B, B+, Zero) based on the ARMv6 CPU.
See also:
GCC 8 Cross Compiler outputs ARMv7 executable instead of ARMv6
Set up the toolchain
There is no official git repository containing an updated toolchain (See https://github.com/raspberrypi/tools/issues/102).
...
OPTION (RECOMPILE) is Always Faster; Why?
...Commits, or your Cross Product was fine for a smaller set but now takes up CPU and Memory as it scales larger, this may also be true for using DISTINCT, you are calling a function for every row, your key matches don't use an index because of CASTING type conversion or NULLS or functions... Too many...
Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...在DeleteDirectory里实现删除目录的同步），而删除文件则没问题。
这里有一点需要注意：因为执行Cleanup之前，可能会多次调用CreateFile，比如记事本保存文档时就会执行两次CreateFile之后再调用Cleanup，所以我在Cleanup的最后执行MySet...
List of Big-O for PHP functions
... array size has nothing to do with algorithmic complexity, it is caused by CPU cache effects. The larger the array is, the more likely it is that random-access lookups will result in cache misses (and cache misses higher in the hierarchy).
– NikiC
Jan 28 '16 at...
In C++, is it still bad practice to return a vector from a function?
...e at a time, which I have verified by re-running the test while monitoring CPU usage). The best performance is achieved when mem(v) = 16kB, which is the order of magnitude of L1 cache (L1 data cache for the i7-7700K is 4x32kB).
Of course, the differences become less and less relevant the more compu...
C dynamically growing array
... processing various things. I would like to avoid using too much memory or CPU for keeping such indexes...
7 Answers
...