Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: C++
Expertise: Intermediate
Mar 16, 1998



Application Security Testing: An Integral Part of DevOps

Enhancing Vector's Performance

Standard vector<> dynamically allocates the required amount of memory it needs; which saves you the bother of memory management. However, letting vector <> acquire additional memory slowly one chunk after another is unacceptable under real-time constraints. But this doesn't mean you have to abandon vector<> yet. In order to avoid the performance penalty of having it re-allocate memory, you can ensure that it has the right amount of memory allocated in advance, like this:
 class Message { //...

#include <vector>
void RealTimeStuff( vector &vm); //severe time constraints

void main() {

using namespace std; //for vector<>

vector <Message> msgs; 

// right before a time-critical code, make room for 1000 Message //objects in advance


//now call safely


}//end main()
Danny Kalev
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date