Centiplatrap/pc-game-fps-doctor

What it does

Pitstop is a portable Windows 10/11 x64 utility for players whose game stutters, lags or refuses to launch. One button runs a check that names the likely causes worst first — a monitor stuck at 60 Hz, a display cable plugged into the motherboard, a single memory stick, Wi-Fi lag spikes — then applies what software can fix and shows pictures for the rest. For VALORANT and Vanguard error codes it maps the code to short steps, including the BIOS path and a Restart into BIOS button that runs shutdown /r /fw /t 0 without key-mashing at boot.

The tool is measurement-first: FPS runs use Intel's PresentMon for 60 seconds without injecting into the game, and "FPS in fights" is reported as the 1% low. Lag is broken down per hop with jitter, loss and an A–F bufferbloat grade, so the report can say whether the problem starts at the PC's Wi-Fi, the router or the internet. Every change is logged and can be undone in one click, and a Windows restore point is created first.

Quick start

1. Download Pitstop-1.2.1-portable-x64.exe from the latest release. It is a single file; no installer and no admin rights are required. The build is not code-signed, so on first launch SmartScreen may offer More info → Run anyway.
2. Open Pitstop and press Check my PC.
3. Press Fix all. Pitstop applies the software-side fixes and shows how to handle the hardware-side items.
4. Press Measure again to repeat the same minute of play and produce a shareable before/after card.

The repository also builds from source: crates/pitstop-core contains the error-code lookup, frametime statistics, checks and the undo journal, with tests. After cloning you need Rust 1.85 or newer and the Tauri prerequisites:

git clone https://github.com/Centiplatrap/pc-game-fps-doctor.git
cd pc-game-fps-doctor
cargo test --workspace
cargo tauri build

Constraints

• Windows 10 or 11 on x64 only; there is no macOS or Linux build.
• Pitstop changes Windows settings but never the game, its files, Vanguard or its driver, and it does not disable Defender, Windows Update, Memory integrity or Spectre mitigations.
• For Windows 11 VALORANT setups, Vanguard needs TPM 2.0 and Secure Boot, and may ask for Memory integrity and IOMMU; the tool helps turn these on rather than off.
• In-game ping may differ by a few ms because Riot does not publish server addresses, so Pitstop probes a public host in each server city.
• It cannot remove hardware bans such as VAN 152, and it does not promise any FPS gain — if nothing is wrong, it says so.
• Licensed under MIT; the bundled Inter and Geist Mono fonts are under the SIL Open Font License 1.1. VALORANT and Riot Vanguard are Riot Games trademarks, and the project is not affiliated with Riot.

HotRepo's take

With 108 stars and 46 forks recorded on its first day on the new-projects list (1 November 2026, JavaScript), Pitstop is a narrowly scoped Windows troubleshooting tool rather than a general game booster. The comparison in the README is telling: instead of applying a long tweak list like Hone or Razer Cortex, it measures with PresentMon first, applies only what it found, and keeps a one-click undo. The 46 forks against 108 stars hints at a young community interested in inspecting or extending the rules files (errors.toml, drivers.toml, regions.toml) that drive the diagnostics. Since it is a single early snapshot, treat the fork ratio as a sign of interest, not of proven performance gains — the project itself declines to promise FPS numbers.