CF Performance Mirror

Name: CF Performance Mirror
Rating: 4.9 (39 reviews)
Author: Pritam Mohanta

Analyze your Codeforces performance — solve time, failure rates, rating changes, and errors by division and time range.

As of June 2026, CF Performance Mirror has 330 users and a 4.90/5 rating from 39 reviews in the Workflow & Planning category.

Pritam Mohanta Workflow & Planning

Chrome Web Store ↗.crx

Users+96.4%

330

Rating+0.2%

4.90

39 reviews

Reviews+5.4%

Version

1.0.15

Manifest V3

90-day change · In the last 90 days this extension 4 version updates, changed permissions.

History

11 snapshots

Tracking since Apr 3, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 3, 2026	168	4.89	37	1.0.12
Apr 17, 2026	180	4.89	37	1.0.13
Apr 23, 2026	228	4.90	39	1.0.14
Apr 28, 2026	277	4.90	39	1.0.14
May 5, 2026	291	4.90	39	1.0.14.7
May 11, 2026	313	4.90	39	1.0.14.7
May 16, 2026	309	4.90	39	1.0.14.7
May 22, 2026	319	4.90	39	1.0.14.7
May 29, 2026	320	4.90	39	1.0.14.7
Jun 5, 2026	309	4.90	39	1.0.14.7
Jun 11, 2026	334	4.90	39	1.0.14.7
Now	330	4.90	39	1.0.15

Changelog

Apr 17, 2026

description

Track your Codeforces performance with clear insights into solve times, failure rates, and problem-level errors, broken down by division and time range. Filter by contest type and focus on selected topics to quickly spot weak areas and improve efficiently, all directly on your profile page

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.

Track your Codeforces performance with clear insights into solve times, failure rates, rating changes and problem-level errors, broken down by division and time range. Filter by contest type and focus on selected topics, rating ranages to quickly spot weak areas and improve efficiently, all directly on your profile page.

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.

Apr 17, 2026

short_description

Analyze overall performance, solve time, failure rates, and errors by division and time range.

Analyze your Codeforces performance — solve time, failure rates, rating changes, and errors by division and time range.

Apr 17, 2026

host_permissions

https://codeforces.com/*, https://*.codeforces.com/*

https://codeforces.com/*

Apr 3, 2026

description

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.

Track your Codeforces performance with clear insights into solve times, failure rates, and problem-level errors, broken down by division and time range. Filter by contest type and focus on selected topics to quickly spot weak areas and improve efficiently, all directly on your profile page

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.

Apr 3, 2026

short_description

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

Analyze overall performance, solve time, failure rates, and errors by division and time range.

Permissions & access

Permissions: None declared
Host access: https://codeforces.com/*

Screenshots

About

Track your Codeforces performance with clear insights into solve times, failure rates, rating changes and problem-level errors, broken down by division and time range. Filter by contest type and focus on selected topics, rating ranages to quickly spot weak areas and improve efficiently, all directly on your profile page.

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.