Further testing without smooth-scrolling enabled suggests that it doesn&#39;t matter if smooth-scrolling off or on:<br><br>I ran elp without smooth-scrolling on again, same file:<br>next-line&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 685&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 18.373000000&nbsp; 0.0268218978<br>
<br><span style="font-family: courier new,monospace;">Function Name&nbsp; Call Count&nbsp; Elapsed Time&nbsp; Average Time</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">
=============&nbsp; ==========&nbsp; ============&nbsp; ============</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">next-line&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 726&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 17.129000000&nbsp; 0.0235936639</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">line-move&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 686&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16.911000000&nbsp; 0.0246516034</span><br style="font-family: courier new,monospace;">
<br><br>And I re-profiled with the older emacs build, same .emacs startup files:<br><br><span style="font-family: courier new,monospace;">Function Name&nbsp; Call Count&nbsp; Elapsed Time&nbsp; Average Time</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">=============&nbsp; ==========&nbsp; ============&nbsp; ============</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">next-line&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 653&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1.5950000000&nbsp; 0.0024425727</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">line-move&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 652&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0.5180000000&nbsp; 0.0007944785</span><br><br><br><br>