CF Performance Mirror

Analyse your Codeforces profile — solve times, WA% by topic and problem, division breakdown, and time-range filters.

Features 1. Solve Time Analysis — Avg & median solve time per problem index (A–H), broken down by division. 2. WA% Friction — WA, TLE, RTE, MLE counts by topic or problem. Click any topic to expand problems with direct links and solved/unsolved status. 3. Division-Aware — Auto-splits into Div1/2/3/4/Other. Combined/Global rounds are assigned based on your rating at contest time. 4. Two Friction Views — Topics (tag-level, sortable by WA% or attempts) and Problems (flat list, sortable by errors or rating). 5. Category + Overall Tabs — Division-specific stats plus an Overall tab with a Practice Only toggle. 6. Time-Range Filters — Last 1/3/6/12/24 months, all time, or custom date range. 7. Total / Rated / Unrated Toggle — Analyze all, rated-only, or unrated/virtual contests. 8. Noise Controls — Hide AC'd problems and set a minimum WA threshold to cut low-signal entries. 9. Persistent Settings — All filters, view mode, and sort order saved across sessions. 10. On/Off Toggle — Collapse to a slim header bar when not needed. State persists across page loads. 11. Lightweight & Themed — Inline below the profile box. Auto-matches Codeforces light/dark theme. How it works Runs entirely client-side on `codeforces.com/profile/<handle>`. Fetches from three public Codeforces APIs (`user.status`, `contest.list`, `user.rating`). No server, no tracking — all computation happens in your browser.