Why r-nacos Beats Java Nacos: Faster Startup, Lower Resource Use

r-nacos Introduction

r-nacos is a Nacos server implemented in Rust . Compared with the Java Nacos, r-nacos provides the same functionality but starts faster, consumes far less system resources, delivers higher performance, and runs more stably.

r-nacos is fully compatible with the latest Nacos client SDK protocols (including the 1.x HTTP OpenAPI and the 2.x gRPC protocol), allowing applications using Nacos to migrate to r-nacos seamlessly.

Memory Usage Comparison

In the same environment, memory usage of rnacos and java‑nacos was measured for identical business requirements.

<code># rust nacos implementation
ps aux | grep rnacos | awk '{print  $6/1024 "M"}'
1.34375M
</code>

<code># official java Nacos version
ps aux | grep Nacos | awk '{print  $6/1024 "M"}'
368.215M
</code>

Quick Start

Download the appropriate package from the GitHub release page, unzip it, and run without any Java dependency.

<code># Linux or macOS unzip
 tar -xvf rnacos-x86_64-apple-darwin.tar.gz
# Run
 ./rnacos
</code>

On Windows, unzip and run

rnacos.exe

directly.

Open a browser and visit http://localhost:10848 to access the console.

Configuration Management Usage

Service Discovery Usage

Service discovery list

Service instance control

Applicable Scenarios

Replace Nacos in development and testing environments with r-nacos for near‑instant startup.

For personal cloud service deployments, r-nacos offers a tiny installation package (~10 MB), no JDK dependency, CPU usage below 0.5 % and memory usage under 5 MB at runtime.

Users of non‑customized Nacos seeking improved performance and stability can consider migrating to r-nacos.

Detailed performance specifications are available in the referenced documentation.

References

[1] r-nacos download:

https://github.com/r-nacos/r-nacos/releases

[2] Detailed performance description:

https://r-nacos.github.io/r-nacos/performance.html