---
id: loop-rate-limiters
version: "1.2.0"
license: unclear
license_treatment: permissive
maintenance: active
---

# loop-rate-limiters — Loop rate limiters.

License: permissive · Maintenance: active · Downloads: 280.7K/mo

## What it is and what it does

Loop rate limiters provides simple frequency regulation for tight loops in Python, offering both synchronous and asynchronous variants. The synchronous RateLimiter class accepts a frequency parameter and sleeps for the appropriate duration each iteration to maintain that rate; the AsyncRateLimiter does the same for asyncio-based code. Both are designed to work similarly to rospy.Rate, making them useful for robotics, control systems, and any application that needs to run a loop at a fixed frequency without busy-waiting.

The package has no external dependencies and supports Python 3.9 through 3.12. It is actively maintained and classified as production-stable, making it suitable for production use in timing-sensitive applications where you need straightforward frequency control without the complexity of a full scheduler.

Use it for:

- Robotics control loops that must execute at a fixed frequency (e.g., 400 Hz sensor polling).
- Asynchronous tasks running in parallel at different frequencies within a single event loop.
- Simulation or game loops that need consistent frame rates or update frequencies.
- Data acquisition or sensor sampling at a regulated rate without blocking other operations.
- Real-time monitoring or telemetry collection at a specified sampling frequency.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides synchronous and asynchronous rate limiters to regulate loop execution frequency at a specified rate, similar to rospy.Rate.

Yes. The package is lightweight, dependency-free, actively maintained, permissively licensed, and solves a common need in control and real-time systems. Install it if you need straightforward loop frequency regulation in synchronous or asynchronous code.

## Install

pip install loop-rate-limiters
uv add loop-rate-limiters
poetry add loop-rate-limiters

## Installing loop-rate-limiters

Before you install: Low friction: pure Python wheel with no runtime dependencies. Actively maintained with a recent release on 2025-08-13 and ongoing repository activity.

License in practice: Permissive license allows use in commercial and open-source projects without significant restrictions.

Quickstart:

pip install loop-rate-limiters

from loop_rate_limiters import RateLimiter
rate = RateLimiter(frequency=400.0)
while True:
    rate.sleep()

Verify before relying:

- Whether the rate limiter maintains accuracy under high-frequency or variable-load conditions.
- How the implementation handles system clock adjustments or sleep precision on different operating systems.

## Package facts

- License: not declared (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 280.7K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

loop rate limiter, frequency regulator, async rate limiter, control loop speed, sleep-based frequency control, rospy rate alternative, asyncio rate limiting, timing-control, robotics, asyncio

[View on SkillFed](https://skillfed.io/packages/loop-rate-limiters) · [View on PyPI](https://pypi.org/project/loop-rate-limiters/)