大约有 37,000 项符合查询结果（耗时：0.0362秒） [XML]
Practical use of `stackalloc` keyword
...if you use stackalloc you greatly increase the chance of cache hits on the CPU due to the locality of data.
share
|
improve this answer
|
follow
|
...
Cosmic Rays: what is the probability they will affect a program?
...
More importantly, the chip feature size for CPUs in 1995 was around 0.35 µm or 350nm. It's now 1/10th that size at 35nm.
– Joe Koberg
Apr 5 '10 at 21:02
...
Error handling in C code
... expensive, even if no error is ever thrown it will consume quite a bit of CPU time and stack space. When using gcc for Windows, you can choose between different exception handling methods for C++, one of them bases on setjmp and it makes your code up to 30% slower in practice.
...
Generating random integer from a range
...ate tens of millions of random numbers in less than a second on a standard CPU with this technique.
EDIT:
Although the above is technically correct, DSimon's answer is probably more useful in practice. You shouldn't implement this stuff yourself. I have seen a lot of implementations of rejection s...
unsigned int vs. size_t
...2 (byte). 16 bit arithmetic was faster than 32 bit arithmetic, though the CPU could handle a (logical) memory space of up to 4 GiB.
Use the int type only when you care about efficiency as its actual precision depends strongly on both compiler options and machine architecture. In particular the C ...
What does Redis do when it runs out of memory?
...ood enough results. 10 Approximates very closely
# true LRU but costs more CPU. 3 is faster but not very accurate.
#
# maxmemory-samples 5
share
|
improve this answer
|
foll...
How to measure time taken by a function to execute
...
In Chrome, press F12 and select the Profiles tab, then Collect JavaScript CPU Profile.
In Firefox, install/open Firebug, and click on the Profile button.
In IE 9+, press F12, click on Script or Profiler (depending on your version of IE).
Alternatively, on your development machine, you can add i...
Purpose of ESI & EDI registers?
...erations that work on a bunch of bytes at a time, and they kind of put the CPU in automatic. Because you're not explicitly coding loops, they do their thing more efficiently (usually) than a hand-coded loop.
Just in case you're wondering: Depending on how you set the operation up, repeated storing ...
How to see which flags -march=native will activate?
...ggest that this is suboptimal. The output of --help=target doesn't display CPU cache information, of which the methods both elias and 42n4 below have listed. Specifically, on gcc 4.9.2 on a Phenom, the output includes these: --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-siz...
Function to calculate distance between two coordinates
...
这个问题问了JavaScript的答案。. You have to convert it to english :)
– VulfCompressor
Oct 12 '15 at 15:56
...