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Does async(launch::async) in C++11 make thread pools obsolete for avoiding expensive thread creation
...
And native, on my MacBook Pro 15" (Intel(R) Core(TM) i7-7820HQ CPU @ 2.90GHz) with Apple LLVM version 10.0.0 (clang-1000.10.44.4) under OSX 10.13.6, I get this:
Do nothing calls per second: 22078079
Empty calls per second: 21847547
New thread calls per second: 433...
What are bitwise operators?
...lculations.
operations:
bitwise AND
bitwise OR
bitwise NOT
bitwise XOR
etc
List item
AND|0 1 OR|0 1
---+---- ---+----
0|0 0 0|0 1
1|0 1 1|1 1
XOR|0 1 NOT|0 1
---+---- ---+---
0|0 1 |1 0
1|1 0
Eg.
...
Java HashMap performance optimization / alternative
...done simpler as follows: int result = a[0]; result = result * 52 + a[1]; //etc.
– rsp
Nov 19 '09 at 16:20
I agree that...
HTTP vs HTTPS performance
...namic vs static content
Client distance to server
Typical session length
Etc (my personal favorite)
Caching behavior of clients
In my experience, servers that are heavy on dynamic content tend to be impacted less by HTTPS because the time spent encrypting (SSL-overhead) is insignificant compared...
How many parameters are too many? [closed]
...pecific cases (calls to OS APIs, routines where optimization is important, etc). I suggest to hide the complexity of these routines by adding a layer of abstraction just above these calls whenever possible.
Nick has some interesting thoughts on this. If you don't want to read his comments, I summari...
Does Python support multithreading? Can it speed up execution time?
...tween threads.
What the GIL prevents then, is making use of more than one CPU core or separate CPUs to run threads in parallel.
This only applies to Python code. C extensions can and do release the GIL to allow multiple threads of C code and one Python thread to run across multiple cores. This ext...
Why prefer two's complement over sign-and-magnitude for signed numbers?
...be added. Since you want the most basic operations (addition, subtraction, etc) to be as fast as possible, you need to store numbers in a way that lets you use the simplest algorithms possible.
Additionally, in the "intuitive" storage method, there are two zeroes:
0000 "zero"
1000 "negative zero...
How does the new automatic reference counting mechanism work?
...ually decide to look at everything it can find starting from the stack and CPU registers. It will never find A,B1,B2,B3 so it will finalize them and recycle the memory into other objects.
When you use ARC or MRC, and finish with A it have a refcount of 3 (B1, B2, and B3 all reference it), and B1/...
Is inline assembly language slower than native C++ code?
...ion scheduling, for example, is very hard to tune by hand) and modern CISC CPUs have very long pipelines too.
For some complex microcontrollers even system libraries are written in C instead of assembly because their compilers produce a better (and easy to maintain) final code.
Compilers sometimes...
How to 'bulk update' with Django?
...10's to 100's. The size of the batch that is right for you depends on your CPU and query complexity. This tool is more like a wheel barrow than a dump truck.
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