The optional "make it fast" pass after a change is right. Reviews it for speed and efficiency (database queries, request time, test suite speed, and page responsiveness), verifies each finding, fixes what it can measure, and reports before-and-after numbers. Use when the user says "make it fast", "speed this up", "performance review", "why is this page slow", "check for N+1s", "the specs are slow", or "optimize this", or after `make-it-right` when a change adds or alters queries, endpoints, jobs, spec setup, or markup that loads images, embeds, frames, fonts, or scripts. Skip it for other copy, markup, or style changes: they have nothing to measure.