cloudflare/quiche

Make PTO duration usage and calculation uniform

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#2369 opened on Feb 25, 2026

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 (1 comment) (0 reactions) (0 assignees)Rust (6,975 stars) (505 forks)batch import
good first issue

Description

We have a few p.recovery.pto * 3 calculations scattered throughout the codebase. These seem to be used for calculating timeouts. It would be nice to have this logic extracted into its own function.

Examples:

Contributor guide

Tech stack
rust
Domain
backendperformance
Issue type
refactor
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic Rust knowledgefamiliarity with QUIC PTO concept
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70
Research direction
The issue points to three specific locations in quiche/src/lib.rs (lines 8452-8455, 3233, 4706) where `p.recovery.pto * 3` is used. A new function should be created, perhaps `fn pto timeout(&self) > Duration` in the recovery module, and the scattered calculations replaced with calls to this function. Ensure the function is documented and consider adding a unit test for the timeout calculation. No existing PRs or assignees were found, so the work is available.