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How do cache lines work?
... This answer makes absolutely no sense. What does the 64bit memory bandwidth (which is also wrong in that regard) to do with the 64 byte(!) not bit to do? Also the 10 to 30 ns are also totally wrong if you hit the Ram. It might be true for the L3 or L2 cache but not for the RAM where it is more l...
What is RSS and VSZ in Linux memory management
...
RSS is the Resident Set Size and is used to show how much memory is allocated to that process and is in RAM. It does not include memory that is swapped out. It does include memory from shared libraries as long as the pages from those lib...
Is “inline” without “static” or “extern” ever useful in C99?
...wer also answers your question, I think:
What does extern inline do?
The idea is that "inline" can be used in a header file, and then "extern inline" in a .c file. "extern inline" is just how you instruct the compiler which object file should contain the (externally visible) generated code.
[upd...
Scala type programming resources
...unction. Indeed, type-level programming makes heavy use of implicits.
Consider this example (taken from metascala and apocalisp):
sealed trait Nat
sealed trait _0 extends Nat
sealed trait Succ[N <: Nat] extends Nat
Here you have a peano encoding of the natural numbers. That is, you have a typ...
Reference: Comparing PHP's print and echo
...code. That source code involves the parser as well as opcode handlers. Consider a simple action such as displaying the number zero. Whether you use echo or print, the same handler " ZEND_ECHO_SPEC_CONST_HANDLER" will be invoked. The handler for print does one thing before it invokes the handler fo...
Multiprocessing - Pipe vs Queue
...='__main__':
for count in [10**4, 10**5, 10**6]:
# Pipes are unidirectional with two endpoints: p_input ------> p_output
p_output, p_input = Pipe() # writer() writes to p_input from _this_ process
reader_p = Process(target=reader_proc, args=((p_output, p_input),))
...
What GRANT USAGE ON SCHEMA exactly do?
...o create for the first time a Postgres database, so this is probably a stupid question. I assigned basic read-only permissions to the db role that must access the database from my php scripts, and I have a curiosity: if I execute
...
Transitioning from Windows Forms to WPF
...erms of UI components, not data objects. In addition, binding in WinForms didn't always exist in the state it does now, so many developers that grew up with WinForms, or who are used to other technologies that don't use bindings, will often not identify this key difference when switching to a bound ...
Different types of thread-safe Sets in Java
...er accesses which are running at this time continue with the old array, avoiding necessity of synchronization between readers and writers (though writing itself needs to be synchronized). The normally fast set operations (especially contains()) are quite slow here, as the arrays will be searched in ...
std::vector versus std::array in C++
...t grows and shrinks automatically if elements are added or removed. It provides all the hooks (begin(), end(), iterators, etc) that make it work fine with the rest of the STL. It also has several useful methods that let you perform operations that on a normal array would be cumbersome, like e.g. ins...