Analyzing a MediaWiki request profile in Speedscope, using the Sandwich mode to find the hottest code by "self" time, with a reverse flame graph generated next to it, filtered to only the relvant samples.
Jamie Wong
CC BY-SA 4.0
<a class="external text" href="https://performance.wikimedia.org/excimer/profile/d737a77fdadee789">Excimer UI</a>