大约有 46,000 项符合查询结果（耗时：0.0533秒） [XML]
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...o square root I've noticed something odd: using the SSE scalar operations, it is faster to take a reciprocal square root and multiply it to get the sqrt, than it is to use the native sqrt opcode!
...
C++ performance vs. Java/C#
...ding is that C/C++ produces native code to run on a particular machine architecture. Conversely, languages like Java and C# run on top of a virtual machine which abstracts away the native architecture. Logically it would seem impossible for Java or C# to match the speed of C++ because of this inte...
Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
...ementation which is coming in the imminent 2.8 release. Those familiar with the library from 2.7 will notice that the library, from a usage perspective, has changed little. For example...
...
Why don't self-closing script elements work?
...nce of an element whose content model is not EMPTY (for example, an empty title or paragraph) do not use the minimized form (e.g. use <p> </p> and not <p />).
XHTML DTD specifies script elements as:
<!-- script statements, which may include CDATA sections -->
<!ELEMENT ...
Why use prefixes on member variables in C++ classes
...
You have to be careful with using a leading underscore. A leading underscore before a capital letter in a word is reserved.
For example:
_Foo
_L
are all reserved words while
_foo
_l
are not. There are other situations where leading underscor...
Differences between distribute, distutils, setuptools and distutils2?
...t updated" date displayed, so you can check the recency of the manual, and it's quite comprehensive. The fact that it's hosted on a subdomain of python.org of the Python Software Foundation just adds credence to it. The Project Summaries page is especially relevant here.
Summary of tools:
Here's a...
Why is “except: pass” a bad programming practice?
...metimes I just don't care what the errors are and I want to just continue with the code.
16 Answers
...
Visual Studio 2010 isn't building before a run when there are code changes
I've been using using F5 (Start Debugging) for years to build the code (if its out of date), and then debug. This was working on VS 2010 also, however today it just start debugging without a build. Say I do a clean on the project, and then hit F5 instead of building it so it can run it throws an err...
How to read a (static) file from inside a Python package?
...
[added 2016-06-15: apparently this doesn't work in all situations. please refer to the other answers]
import os, mypackage
template = os.path.join(mypackage.__path__[0], 'templates', 'temp_file')
share
...
When should I use Inline vs. External Javascript?
I would like to know when I should include external scripts or write them inline with the html code, in terms of performance and ease of maintenance.
...