Speed up sending request to ksysguardd
This is an old revision that got accepted, but only committed on the 5.17 branch, not to master. The rest is still relevant.
Summary:
While investigating bug 407526, I discovered that most of the time is
spent in SensorAgent::sendRequest.
This is because it searches the whole queue lineraly, which could take a
lot of time if there's a lot of requests. This patch speeds it up by
using a QSet of outstanding requests, obviating the need to search the
queues.
Part of {T11473}
Reviewers: #plasma, davidedmundson
Reviewed By: #plasma, davidedmundson
Subscribers: plasma-devel
Tags: #plasma
Differential Revision: https://phabricator.kde.org/D23595