# google/re2

> A C++ regular expression library with guaranteed linear-time matching, safe against untrusted input. It does not support backreferences or look-around, but avoids catastrophic backtracking.

- Magnitude: 0.7 out of 10 — Quiet
- Stars: 9,817 total · +1 star measured 2026-10-07, 11:05–12:55 UTC, ≈ 2 by evening
- Star trust: star growth looks organic
- Category: Developer tools · Language: C++ · License: BSD-3-Clause · Created: 2014-08-18 · Last push: 2026-10-02
- GitHub: https://github.com/google/re2 · Page: https://gitnova.dev/en/r/google/re2

## Useful for

- Process user-supplied regex in a service without ReDoS risk
- Parse and validate strings in C++ with submatch extraction
- Replace PCRE or std::regex in hot paths for predictable runtime

## Why it’s here

- Star-counter measurements on 2026-10-07 (UTC), 11:05–12:55: 9816 → 9817 stars (+1). This is the change over that interval.
- Estimated end-of-day forecast: about +2 stars, using observed gains and the previous day.
- GitHub Trending C++ today: #10, +3 stars.

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 1,252
- Issues and pull requests: 639
- Watchers: 231
- Average over the last week: 2 per day
- Usual pace: 1 per day
- Stars in the last hour (measured): 0
- Latest release: 2025-11-05 (2025-11-05)

## Stars per day, last 30 days (oldest → newest, today is partial)

2026-09-08 … 2026-10-07: 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 3, 2, 1, 1, 3, 2, 3, 1

## Spotted in now

- GitHub Trending C++ today: #10, +3 stars

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-10-07 12:58 UTC, updated every 30 minutes.