Qlist

QList is a class in Qt that implements a list, providing fast index-access, as well as fast insertions and removals of elements.

Qvector

The QVector class, part of the Qt framework, is a template class that provides a dynamic array.



Words efficient transactions

Example

"Size qlist performs better than qvector because it doesn t store the"

from question  

QList vs QVector revisited

"Qvector is better than qlist in this case because it s easy to resize it"

from question  

Build QVariant list from non-ordered data

"Which brings me to the point - if transaction ids are per savings account transaction ids are per savings account would be sequential in other words you will be better off with the qlist or even better a qvector because it will be a little more efficient since you will only be appending transactions"

from question  

What is an associative container? Have to change QList given to this container

Performance stores memory

Example

"If the size of the qlist s element type is greater than the pointer s size qlist performs better than qvector because it doesn t store the objects sequentially but stores sequentially pointers to heap copies"

from question  

QList vs QVector revisited

"Qvector will usually give better performance than qlist because qvector always stores its items sequentially in memory where qlist will allocate its items on the heap unless sizeof t sizeof void and t has been declared to be either a q_movable_type or a q_primitive_type using q_declare_typeinfo"

from question  

What is the difference between QByteArray and QList<unsigned char> or QVector<unsigned char>?

Others

Example

Qlist code is generally less optimized than qvector one

from question  

What is QList's maximum size?

Edit if you dont need it to interact with other api alot you can use qvector to replace qlist which is faster according to qt official

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QMap but without sorting by key

If it stores it as pointers on the heap won t qlist be much worse off than qvector

from question  

QList vs QVector revisited

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