dynatrace-oss/hash4j
Dynatrace hash library for Java
⚡ Executive Summary & Quick Facts
Authoritative Sourcehash4j is hash4j is an open-source project written in Java: Dynatrace hash library for Java..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), dynatrace-oss/hash4j has accumulated 164 GitHub stars and 17 forks. It is written in Java, licensed under Apache-2.0, and ranks #21,172 globally. It is actively maintained with the latest commit recorded on Nov 3, 2026.”
| Repository | dynatrace-oss/hash4j ↗ |
|---|---|
| Primary Category | cardinality estimation |
| Language & Stack | Java |
| Software License | Apache-2.0 |
| Community Traction | ★ 164 stars · ⑂ 17 forks · #21,172 globally |
| Maintenance | ● Active (Last commit: Nov 3, 2026) · 5 open issues |
| Target Audience | Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 93/100 · Grade A+Yes, hash4j is actively maintained. Continuous telemetry recorded the last code commit on Nov 3, 2026 (10 days ago). Supported by 164 stars and 17 community forks, this repository holds a calculated health index of 93/100, reflecting very active (commits within last 14 days) and healthy issue cadence.
Star History
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+6
STARS · LAST 30 DAYS
1
PER DAY
#1,555
MOST-STARRED Java
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +6 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +2 | +10 |
hash4j gained 6 stars in the last 30 days, about 1 a day, and now has 164. It is about 5 years old and has averaged roughly 33 stars a year. It ranks #1,555 among Java repositories and #21,172 across all languages on GitHubRepo.
Trending Record
43
DAYS ON TRENDING
#4739
BEST RANK
Sep 27, 2026
FIRST APPEARANCE
Active
STATUS TODAY
hash4j has maintained a continuous presence across global trending indexes, peaking at #4739. Below is the 30-day activity profile:
💡 Overview
hash4j is an open-source project written in Java: Dynatrace hash library for Java.
Engineered for speed, consistency, and developer ease, it solves common hurdles in cardinality-estimation, consistent-hashing, data-sketches. 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 Java 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/dynatrace-oss/hash4j.git
cd hash4j⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
JDK 17 or higher (OpenJDK / GraalVM)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
hash4j coordinates its core functionality through a modular Java 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 hash4j into Java 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 hash4j using your package manager: `git clone https://github.com/dynatrace-oss/hash4j.git`
Initialize your project workspace or configuration file for hash4j.
Import hash4j into your codebase or invoke it directly from your terminal.
Execute your test suite or run `hash4j --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
dynatrace-oss/hash4j is currently ranked #21,172 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #21,122 | mydisha/keirouter | Go | ★ 165 | Compare ↗ |
| #21,122 | chi11321/CrabPort | Rust | ★ 165 | Compare ↗ |
| #21,122 | andreypudov/core-eq | Swift | ★ 165 | Compare ↗ |
| #21,122 | supercorp-ai/supercov | Rust | ★ 165 | Compare ↗ |
| #21,122 | coldMEW/Hush | Java | ★ 165 | Compare ↗ |
| #21,172 | dynatrace-oss/hash4j This Project | Java | ★ 164 | |
| #21,172 | gregkh/bti | Perl | ★ 164 | Compare ↗ |
| #21,172 | schacon/whygitisbetter | Shell | ★ 164 | Compare ↗ |
| #21,172 | newzealandpaul/webarchiver | Objective-C | ★ 164 | Compare ↗ |
| #21,172 | mdub/sham_rack | Ruby | ★ 164 | Compare ↗ |
| #21,172 | nriley/Pester | Perl | ★ 164 | Compare ↗ |
Frequently Asked Questions
What does hash4j do? +
Dynatrace hash library for Java
Is hash4j actively maintained in 2026? +
Yes, hash4j is actively maintained. The latest code push was recorded on Nov 3, 2026 (10 days ago). It holds a calculated Maintenance Health Score of 93/100 (A+ rating) with 164 stars and 5 open issues.
What language is hash4j written in? +
The primary language is Java. Topics include: cardinality-estimation, consistent-hashing, data-sketches, farmhash, hash.
How many stars does hash4j have? +
hash4j has 164 stars and 17 forks on GitHub.
How does hash4j rank among GitHub repositories? +
With 164 stars, dynatrace-oss/hash4j is ranked #21,172 globally across all repositories tracked on GitHubRepo and #1,555 among Java projects.
What license is hash4j distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
