I would like to have section titles with runin so that there is no newline after the section title. This can be done with
\documentclass{article}
\usepackage{titlesec}
\title{\section}[runin]{\large}{\thesection}{1em}{}[]
\begin{document}
\section{First section}
This text follows on the same line as "First section"
\end{document}
However, I am using the KOMA-Script scrartcl class and use of the titlesec package is discouraged (see Incompatibilities between KOMA-Script and titlesec).
I have searched through the KOMA-Script documentation, but cannot find anything like the runin option in titlesec. How can I achieve this functionality while using a KOMA-Script class?