# Spike Trace

Captures a frame-time spike during a heavy scene: FPS has fallen to 34 with a 29.4ms frame time, draw calls jump to 2,180, and triangles climb to 4.87M. The `fpsHistory` nosedives from a smooth 60 into the low 30s, and a widened 200px sparkline pinned `bottom-left` makes the stutter obvious at a glance.