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WCF：使用Array替代List - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
...你能想象我是多么惊讶地看到服务进程的CPU消耗吗？约400K的Image CPU达到了15-20%。我必须考虑一个更好的方案了。
以下是WCF中duplex channel的结构：
[ServiceContract(CallbackContract = typeof(IServiceCallback),
SessionMode = SessionMode.Required)]
...
WCF：使用Array替代List - 更多技术 - 清泛网 - 专注C/C++及内核技术
...你能想象我是多么惊讶地看到服务进程的CPU消耗吗？约400K的Image CPU达到了15-20%。我必须考虑一个更好的方案了。
以下是WCF中duplex channel的结构：
[ServiceContract(CallbackContract = typeof(IServiceCallback),
SessionMode = SessionMode.Required)]
...
How to break/exit from a each() function in JQuery? [duplicate]
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"simple return" actually returns. It will return control from the each and everything else around it and after it until it exit's each()'s parent control - such as a function() which is using each. This is the correct answer, and the other approach will not work.
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How to send an email with Python?
...b together to send email. Please look at the following example (reproduced from the Python documentation). Notice that if you follow this approach, the "simple" task is indeed simple, and the more complex tasks (like attaching binary objects or sending plain/HTML multipart messages) are accomplished...
How can I update the current line in a C# Windows Console App?
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805
If you print only "\r" to the console the cursor goes back to the beginning of the current line...
Is there a command to refresh environment variables from the command prompt in Windows?
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a. I couldn't find a straightforward way to export environment variables from a vbs script back to the command prompt, and
b. the PATH environment variable is a concatenation of the user and the system PATH variables.
I'm not sure what the general rule is for conflicting variables between user ...
Python - Create a list with initial capacity
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def doAppend( size=10000 ):
result = []
for i in range(size):
message= "some unique object %d" % ( i, )
result.append(message)
return result
def doAllocate( size=10000 ):
result=size*[None]
for i in range(siz...
Any shortcut to initialize all array elements to zero?
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A default value of 0 for arrays of integral types is guaranteed by the language spec:
Each class variable, instance variable, or array component is initialized with a default value when it is created (§15.9, §15.10) [...] For type int, th...
How to execute a file within the python interpreter?
I'm trying to execute a file with python commands from within the interpreter.
11 Answers
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Append value to empty vector in R?
...et.seed(21)
values <- sample(letters, 1e4, TRUE)
vector <- character(0)
# slow
system.time( for (i in 1:length(values)) vector[i] <- values[i] )
# user system elapsed
# 0.340 0.000 0.343
vector <- character(length(values))
# fast(er)
system.time( for (i in 1:length(values)) vec...