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Is calculating an MD5 hash less CPU intensive than SHA family functions?
...my Intel x86 (Core2 Quad Q6600, 2.4 GHz, using one core), I get this in 32-bit mode:
MD5 411
SHA-1 218
SHA-256 118
SHA-512 46
and this in 64-bit mode:
MD5 407
SHA-1 312
SHA-256 148
SHA-512 189
Figures are in megabytes per second, for a "long" message (this is what ...
How is the default max Java heap size determined?
...ors
2 or more Gbytes of physical memory
with the exception of 32 bit platforms
running a version of the Windows
operating system. On all other
platforms the default values are the
same as the default values for version
1.4.2.
In the J2SE platform version 1.4.2 by
default ...
How can I link to a specific glibc version?
When I compile something on my Ubuntu Lucid 10.04 PC it gets linked against glibc. Lucid uses 2.11 of glibc. When I run this binary on another PC with an older glibc, the command fails saying there's no glibc 2.11...
...
What are the relative strengths and weaknesses of Git, Mercurial, and Bazaar? [closed]
... The down side of this is that it has a relatively steep learning curve. A Win32 port is available, but not quite a first-class citizen. Git exposes hashes as version numbers to users; this provides guarantees (in that a single hash always refers to the exact same content; an attacker cannot modify ...
Most common C# bitwise operations on enums
For the life of me, I can't remember how to set, delete, toggle or test a bit in a bitfield. Either I'm unsure or I mix them up because I rarely need these. So a "bit-cheat-sheet" would be nice to have.
...
Java SE 6 vs. JRE 1.6 vs. JDK 1.6 - What do these mean?
...://download.oracle.com/otn-pub/java/jdk/7/jdk-7-windows-x64.exe (for my 64-bit Windows 7 system)
You are now downloading (hopefully the latest) JDK for your system! :)
Keep in mind the above links are for reference purposes only, to show you the step by step method of what it takes to download the...
How do exceptions work (behind the scenes) in c++
...ion
{
public:
MyException() { }
~MyException() { }
};
void my_throwing_function(bool throwit)
{
if (throwit)
throw MyException();
}
void another_function();
void log(unsigned count);
void my_catching_function()
{
log(0);
try
{
log(1);
another_functi...
CreateWindow()动态创建一个EditBox - C/C++ - 清泛网 - 专注C/C++及内核技术
CreateWindow()动态创建一个EditBox在Win32代码或MFC代码中动态创建一个EditBox：在OnInitDialog()函数中： 创建EditBox HWND m_wndEdit = CreateWindow(_T("EDI...在Win32代码或MFC代码中动态创建一个EditBox：
在OnInitDialog()函数中：
// 创建Edit...
Why does SSL handshake give 'Could not generate DH keypair' exception?
...m is the prime size. The maximum-acceptable size that Java accepts is 1024 bits. This is a known issue (see JDK-6521495).
The bug report that I linked to mentions a workaround using BouncyCastle's JCE implementation. Hopefully that should work for you.
UPDATE
This was reported as bug JDK-7044060...
What is the difference between the kernel space and the user space?
...T instructions.
cannot do IO instructions like in and out, and thus have arbitrary hardware accesses.
Otherwise, for example, file permissions would be useless if any program could directly read from disk.
More precisely thanks to Michael Petch: it is actually possible for the OS to allow IO instr...