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Are Exceptions in C++ really slow
...y takes a long time
Determining the right handler involves RTTI: many RTTI descriptors to fetch, scattered around memory, and complex operations to run (basically a dynamic_cast test for each handler)
So, mostly cache misses, and thus not trivial compared to pure CPU code.
Note: for more details,...
What is the canonical way to check for errors using the CUDA runtime API?
...
This will incorporate the filename, line number, and an English language description of the cudaError_t into the thrown exception's .what() member:
#include <iostream>
int main()
{
try
{
// do something crazy
throw_on_cuda_error(cudaSetDevice(-1), __FILE__, __LINE__);
}
cat...
Algorithm to generate a crossword
...
Nice description. I thought about this a few times in the past, but never tried it. Now for the magic question: how well did it work? Just for sparse puzzles, or also for dense ones (like in the paper)? And how many clues do you n...
@property retain, assign, copy, nonatomic in Objective-C
...
Variable property attributes or Modifiers in iOS
Here is the Sample Description from Article
atomic
-Atomic means only one thread access the variable(static type).
-Atomic is thread safe.
-but it is slow in performance
-atomic is default behavior
-Atomic accessors in a non garbage collecte...
O(nlogn) Algorithm - Find three evenly spaced ones within binary string
...wever, there is a simple linear-time reduction from AVERAGE to 3SUM, whose description we omit.
Wikipedia:
When the integers are in the range [−u ... u], 3SUM can be solved in time O(n + u lg u) by representing S as a bit vector and performing a convolution using FFT.
This is enough to sol...
JavaScript hashmap equivalent
...
Problem description
JavaScript has no built-in general map type (sometimes called associative array or dictionary) which allows to access arbitrary values by arbitrary keys. JavaScript's fundamental data structure is the object, a sp...
“Single-page” JS websites and SEO
...lt;h1><%= @article.title %></h1>
<p><%= @article.description %></p>
<p><%= @article.content %></p>
</div>
And then using JavaScript, which doesn't get run when a JavaScript-disabled device opens the page:
$("#no-js").remove() # jQuery
...
What is the meaning of “non temporal” memory accesses in x86
...n-temporal data to memory in a manner that minimizes pollution of caches.
Description of non-temporal load and store instructions.
Source: Intel 64 and IA-32 Architectures Software Developer’s Manual, Volume 2: Instruction Set Reference
LOAD (MOVNTDQA—Load Double Quadword Non-Temporal Aligned H...
Dependency Inject (DI) “friendly” library
... VB.NET, Java (languages you'd think "need" IoC apparently judging by your description), it's definitely not about languages limitations. It's about conceptual limitations. I invite you to learn about functional programming instead of resorting to ad-hominem attacks and poor arguments.
...
What's the difference between deadlock and livelock?
... Thank you very much for the clarification. Anyway, your answer was quite descriptive and helpful unlike others
– Vinay Yadav
Apr 19 at 13:29
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