I could confirm that with my main user and some complete downloads on the list, starting kget that way is abnormally slow to start compared no any other KDE apps.

But I couldn't reproduce this with a new user and with empty kget download list.

(In reply to Henrique Sant'Anna from comment #1)
> I could confirm that with my main user and some complete downloads on the
> list, starting kget that way is abnormally slow to start compared no any
> other KDE apps.
> 
> But I couldn't reproduce this with a new user and with empty kget download
> list.

It seems it rechecks all (already) donwloaded files urls, If I start it from terminal it shows the following messsages :

 Verifying Metalink/HTTP Status
Mime Type:  "application/xml"
No Metalink HTTP response found
 Verifying Metalink/HTTP Status
Mime Type:  "application/zip"
No Metalink HTTP response found
 Verifying Metalink/HTTP Status
Mime Type:  "application/vnd.appimage"
No Metalink HTTP response found
 Verifying Metalink/HTTP Status
Mime Type:  "application/octet-stream"
No Metalink HTTP response found
 Verifying Metalink/HTTP Status
Mime Type:  "application/octet-stream"
No Metalink HTTP response found
 Verifying Metalink/HTTP Status
Mime Type:  "application/octet-stream"
No Metalink HTTP response found
QWidget::insertAction: Attempt to insert null action
QWidget::insertAction: Attempt to insert null action
"My Downloads"
"My Downloads"
"My Downloads"
"My Downloads"
Recalculate limits? true
"My Downloads"
"My Downloads"
"My Downloads"
"My Downloads"