This test scrolls several pages where each represent a different known "hard" case to scroll (* needinfo), and measures the average frames interval (1/FPS) on each. The ASAP test (tscrollx) iterates in unlimited frame-rate mode thus reflecting the maximum scroll throughput per page. To turn on ASAP mode, we set these preferences:
preferences = {'layout.frame_rate': 0, 'docshell.event_starvation_delay_hint': 1}
See also the tp5o_scroll entry which has relevant information for this test.
{| class="mw-collapsible mw-collapsed wikitable"