cloudflare/workerd
The JavaScript / Wasm runtime that powers Cloudflare Workers
Star History
Momentum
+219
STARS · LAST 30 DAYS
7
PER DAY
#48
MOST-STARRED C++
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +49 | +219 | +630 |
| Per day | 7 | 7 | 7 |
| Forks gained | +4 | +15 | +38 |
workerd gained 219 stars in the last 30 days, about 7 a day, and now has 8.8K. It is about 4 years old and has averaged roughly 2.2K stars a year. It ranks #48 among C++ repositories and #811 across all languages on GitHubRepo.
Trending Record
5
DAYS ON TRENDING
#580
BEST RANK
Sep 25, 2026
FIRST APPEARANCE
Active
STATUS TODAY
workerd has maintained a continuous presence across global trending indexes, peaking at #580. Below is the 30-day activity profile:
💡 Overview
workerd is an open-source project written in C++: The JavaScript / Wasm runtime that powers Cloudflare Workers.
Engineered for speed, consistency, and developer ease, it solves common hurdles in C++. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in C++ for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/cloudflare/workerd.git
cd workerd⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C++20 compliant compiler (GCC 11+, Clang 13+, MSVC)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
workerd coordinates its core functionality through a modular C++ pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed workerd into C++ backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open Apache-2.0 license.
🚀 Getting Started
Install workerd using your package manager: `git clone https://github.com/cloudflare/workerd.git`
Initialize your project workspace or configuration file for workerd.
Import workerd into your codebase or invoke it directly from your terminal.
Execute your test suite or run `workerd --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C++, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
cloudflare/workerd is currently ranked #811 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #806 | EpicGames/lore | Rust | ★ 8.8K | Compare ↗ |
| #807 | owncloud/core | PHP | ★ 8.8K | Compare ↗ |
| #808 | frappe/hrms | Python | ★ 8.8K | Compare ↗ |
| #809 | justlovemaki/AIClient2API | JavaScript | ★ 8.8K | Compare ↗ |
| #810 | BornToBeRoot/NETworkManager | C# | ★ 8.8K | Compare ↗ |
| #811 | cloudflare/workerd This Project | C++ | ★ 8.8K | |
| #812 | getsentry/sentry-javascript | TypeScript | ★ 8.7K | Compare ↗ |
| #813 | tuupola/lazyload | JavaScript | ★ 8.7K | Compare ↗ |
| #814 | florisboard/florisboard | Kotlin | ★ 8.7K | Compare ↗ |
| #815 | apache/beam | Java | ★ 8.7K | Compare ↗ |
| #816 | kickstarter/ios-oss | Swift | ★ 8.7K | Compare ↗ |
Frequently Asked Questions
What does workerd do? +
The JavaScript / Wasm runtime that powers Cloudflare Workers
What language is workerd written in? +
The primary language is C++. Topics include: software.
Is workerd actively maintained? +
Yes, the last recorded push was on Sep 27, 2026 with 749 open issues being tracked.
How many stars does workerd have? +
workerd has 8,779 stars and 756 forks on GitHub.
How does workerd rank among GitHub repositories? +
With 8,779 stars, cloudflare/workerd is ranked #811 globally across all repositories tracked on GitHubRepo and #48 among C++ projects.
What license is workerd distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
