All Questions
Tagged with c++performance
71 questions
2votes
2answers
413views
Game Systems Interaction Design
Intro I'm writing an FPS game in c++. There is a timed game mode, players run around a map shoot from a variety of weapons which are either hitscan or projectile based, when a shot connects, based on ...
- 161
15votes
6answers
6kviews
Why is it necessary to mark classes as not inherited from? Can't an optimizer automatically detect that virtual calls are unnecessary?
In C# and C++, an apparent trend is in place to reduce / avoid inheritance: C#: "Sealing types can improve performance." https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/...
user417068
2votes
1answer
1kviews
Saving and reading files in user specific application data in C or C++
Most useful or reasonably complex applications need to save data such as user settings or saved games or browser history. I have been working on applications and games in C or C++ but I am not sure ...
- 1,199
2votes
0answers
215views
Speed up implementation of "log transform" on 2D image
I'm working on an implementation of the "log transform" operator on an image for C++, and we currently have it formulated as follows (python code). Note we use log10 instead of the natural ...
- 129
0votes
1answer
150views
Best software architecture approach for a single core system
Objective: Designing a data intensive application(myApp) C++ on Linux/RTOS which runs on a single core cpu, there are also 150 other applications share the same core with high priority than myApp. How ...
- 141
-1votes
2answers
254views
Performance hit after non-functional refactoring
I was asked to refactor some C++ code recently for the purposes of increasing unit testing coverage. The problem was that the code was tightly coupled on one compilation unit, so we had the equivalent ...
- 241
2votes
1answer
424views
Difference between `Class.X` and `Class.getX()`?
Might be a silly question or something I might have just messed up in my head but here we go... I saw a code example of someone using getPos() in their own class to retrieve the current position of an ...
- 139
3votes
1answer
893views
C++: Broadcast/observer pattern with polymorphic events
I'm currently trying to implement an event-system following a broadcast/observer scheme. I have events/notifications that contain information about what is happening: class Event { public: Event(...
4votes
1answer
4kviews
In C++, If a member function can be made static with no change to functionality, are there any performance or memory benefits from doing so?
A very straightforward question. When I think about many of the member functions I create for my classes, many of them can be made static without affecting any functionality whatsoever. If I do so; ...
- 3,633
0votes
2answers
1kviews
Is it good practice to throw exceptions in parsing functions
I basically read across the entire internet that exceptions are bad, slow and should be avoided whenever possible. This confuses me because I thought I have a "valid" case to use exceptions. Consider ...
- 162
0votes
0answers
282views
How can you multithread an html parser [ in C++ and similar languages ]?
Ive done two HTML parsers. Done with Regular Expressions [that accounted for nesting]. It was quick, but error prone. Done by evaluating Character by Character through switches. Here was the basic ...
- 3,633
1vote
2answers
6kviews
Will compiled python code be as fast as compiled C++ code?
I know that Python is an interpreted language and that c++ is a compiled one, or at least I like to think that I've understood some of their differences. Although C++ is apparently faster than ...
1vote
2answers
797views
How to declare and share a lot of variables to provide best performance
My question is not about dilemma between clean code vs performance, but I want to understand exact issue with declaring variables and sharing them between functions. I read in many threads, that from ...
- 123
2votes
1answer
145views
Optimal design for improved performance of a simulation code
I'm writing a code for the Discrete Element Method where I have balls (spheres) and walls (planes) interacting with each other. Those simulations are run for billions of time steps, so performance ...
- 131
8votes
1answer
665views
How can I optimize a program's performance when no profiling tools are available?
I am currently working on an OpenGl program whose performance I would like to improve. The performance is okay but not ideal on powerful dedicated GPUs, but is abysmal on integrated graphics (< 10 ...
- 889
