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Structure padding and packing
... byte long) is, since it will be inside one of those blocks, requiring the CPU to process only 1 word.
When we deal with data larger than one byte, like a 4 byte int or a 8 byte double, the way they are aligned in the memory makes a difference on how many words will have to be processed by the CPU....
GOTO still considered harmful? [closed]
...ata. For example, a repeating data structure (e.g. array, sequential file, etc.) is naturally processed by a repeated unit of code. Having built-in structures (e.g. while, for, until, for-each, etc.) allows the programmer to avoid the tedium of repeating the same cliched code patterns.
Even if GOTO ...
How to install PyQt4 on Windows using pip?
...
In the filenames cp27 means C-python version 2.7, cp35 means python 3.5, etc.
Since Qt is a more complicated system with a compiled C++ codebase underlying the python interface it provides you, it can be more complex to build than just a pure python code package, which means it can be hard to ins...
What is the best place for storing uploaded images, SQL database or disk file system? [closed]
...ems.
One other note: if you are using NTFS based storage (windows server, etc) you might consider finding a way around putting thousands and thousands of files in one directory. I am not sure why, but sometimes the file system does not cope well with that situation. If anyone knows more about this ...
也来说说ReactOS的调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...freeldr.rbuild,发现并没有fDebug,那我们自己填,怎么填?嗯是个问题.
follow me:来到这个模块所在的主目录下也就是D:\Program Files\ReactOS_src\boot\freeldr\,找到freeldr.rebuild文件打开添加下面的:
代码:
<directory name="fdebug">
<xi:include href...
Changing the interval of SetInterval while it's running
...n. setTimeout is subject to being delayed (by 100% cpu use, other scripts, etc) where as setInterval IS NOT affected by those delays--making it far superior for 'realtime' stuff
– RozzA
Dec 26 '13 at 20:59
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科大讯飞徐景明：从语音交互到人工智能 - 资讯 - 清泛网 - 专注C/C++及内核技术
...的填空题、问答题、作文等主观题，由机器改卷都将不成问题。
这两年，中国经济进入“新常态”，科大讯飞的增速不但没有降低，反而实现逆势的高速增长。2015年前三季度，科大讯飞的营业收入达16.7亿元，同比增长51.5%；净...
Is System.nanoTime() completely useless?
... code that uses nanoTime() for timed blocking, interval waiting, timeouts, etc. should preferably treat negative time differences (timeouts) as zeros rather than throw exceptions. This practice is also preferable because it is consistent with the behaviour of all timed wait methods in all classes in...
Favourite performance tuning tricks [closed]
...bles
Build with triggers on the underlying tables
Build daily / hourly / etc.
Build ad-hoc
Build incrementally or teardown / rebuild
See what the query plan is with SET SHOWPLAN ON
See what’s actually happenning with SET STATS IO ON
Force an index using the pragma: (index: myindex)
Force th...
Solving “Who owns the Zebra” programmatically?
...hite Swede dog beer Blue Master
It takes 0.6 seconds (CPU 1.5GHz) to find the solution.
The answer is "German owns zebra."
To install the constraint module via pip:
pip install python-constraint
To install manually:
download:
$ wget https://pypi.python.org/packages/s...