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内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...序本身的程序特性进行优化， 比如使用引用计数std::shared_ptr，apache的内存池方式等等。
当然应用程序也可以直接使用系统调用从内核分配内存，自己根据程序特性来维护内存，但是会大大增加开发成本。
本文主要介绍了glibc...
Cannot read configuration file due to insufficient permissions
...n can not access and read web.config file.
Make the file accessible to IIS_IUSRS group. Just right click web.config and click properties, under security tab, add IIS_IUSRS.
So what is this IIS_IUSRS thing?
Your web site is like an exe file. Just like any exe file, it should be started by a user a...
HTTPS connections over proxy servers
...ls.toString(response.getEntity(), StandardCharsets
.UTF_8));
}
}
}
static class MyHTTPConnectionSocketFactory extends PlainConnectionSocketFactory {
@Override
public Socket createSocket(final HttpContext context) throws IOException {
...
Post data to JsonP
... clonedForm.attr('action', postUrl);
var postToken = 'JSONPPOST_' + (new Date).getTime();
clonedForm.attr('id', postToken);
clonedForm.append('<input name="JSONPPOSTToken" value="'+postToken+'">');
clonedForm.attr('id', postToken );
clonedForm.submit();
var tim...
What is this date format? 2011-08-12T20:17:46.384Z
...bout the Java parsing, but that's ISO8601: http://en.wikipedia.org/wiki/ISO_8601
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What is an OS kernel ? How does it differ from an operating system? [closed]
...s, I will defer to the wikipedia page: http://en.wikipedia.org/wiki/Kernel_%28computing%29. Great, thorough overview.
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Incrementing in C++ - When to use x++ or ++x?
...t; 42; ++i)
{
std::cout << i << std::endl;
}
}
_
$> g++ -S pre.cpp
$> g++ -S post.cpp
$> diff pre.s post.s
1c1
< .file "pre.cpp"
---
> .file "post.cpp"
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How to parse JSON in Java
... text. How can I parse it to get the values of pageName , pagePic , post_id , etc.?
34 Answers
...
Officially, what is typename for?
... once then keep it as a reference if you like.
– deft_code
Oct 21 '09 at 15:46
1
The astute reade...
Limits of Nat type in Shapeless
...a> Nat(3)
res10: shapeless.Succ[shapeless.Succ[shapeless.Succ[shapeless._0]]] = Succ()
So to represent the number 1000000, you would have a type that is nested 1000000 levels deep, which would definitely blow up the scala compiler. The current limit seems to be about 400 from experimentation, b...