mjbatch
mjbatch is a Python library for running thousands of MuJoCo simulations in parallel on CPU.
Features include:
- C++ thread pool execution, with the GIL released;
- Live array access to simulation state and controls across the batch, with
bindfor MjData fields; - Per-simulation model parameters, with
expandfor MjModel fields andset_constto recompute derived constants.
For example:
import mujoco, numpy as np
from mjbatch import Batch
model = mujoco.MjModel.from_xml_path("scene.xml")
batch = Batch(model, num_sims=4096) # threads default to every logical CPU
qpos, ctrl = batch.bind("qpos"), batch.bind("ctrl")
batch.expand("geom_friction")[:, :, 0] = np.random.uniform(0.4, 1.2, (4096, 1))
for _ in range(1000):
ctrl[:] = policy(qpos) # your controller, all 4096 at once
batch.step() # step them in parallel; qpos updates in place
Examples
We showcase a range of applications built using mjbatch: RL, MPC, SysID, and hardware
co-design. Each example is a self-contained, performant implementation. For instance, the Go1
RL controller learns to walk in under a minute on a five-year-old M1 laptop.
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| A two-pole cart swung upright with iLQR | A cart-pole swing-up controller using predictive sampling |
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| A G1 humanoid tracking a reference backflip with receding-horizon iLQR | A Go1 quadruped joystick controller trained with PPO |
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| CEM jointly optimizes a robot arm's proportions, gears, and controls | Damped Gauss–Newton fits a Rizon arm's inertial parameters to synthetic motion data |
Run with uv run examples/<file>.py; some need uv sync --group examples. The ones that open
a window need a display; --headless runs the solver without one.
License
Apache-2.0.
Metadata
Release files for mjbatch 0.1.4
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| mjbatch-0.1.4.tar.gz | 25.8 kB | Details |
Built distributions (wheels)
| File | Reset | |||
|---|---|---|---|---|
| mjbatch-0.1.4-cp314-cp314t-win_amd64.whl | CPython 3.14 | CPython 3.14 free-threading | Windows x86-64 | Details |
| mjbatch-0.1.4-cp314-cp314t-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl | CPython 3.14 | CPython 3.14 free-threading | Linux glibc 2.27+ x86-64, Linux glibc 2.28+ x86-64 | Details |
| mjbatch-0.1.4-cp314-cp314t-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl | CPython 3.14 | CPython 3.14 free-threading | Linux glibc 2.26+ ARM64, Linux glibc 2.28+ ARM64 | Details |
| mjbatch-0.1.4-cp314-cp314t-macosx_11_0_arm64.whl | CPython 3.14 | CPython 3.14 free-threading | macOS 11.0+ ARM64 | Details |
| mjbatch-0.1.4-cp314-cp314-win_amd64.whl | CPython 3.14 | CPython 3.14 | Windows x86-64 | Details |
| mjbatch-0.1.4-cp314-cp314-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl | CPython 3.14 | CPython 3.14 | Linux glibc 2.28+ x86-64, Linux glibc 2.27+ x86-64 | Details |
| mjbatch-0.1.4-cp314-cp314-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl | CPython 3.14 | CPython 3.14 | Linux glibc 2.28+ ARM64, Linux glibc 2.26+ ARM64 | Details |
| mjbatch-0.1.4-cp314-cp314-macosx_11_0_arm64.whl | CPython 3.14 | CPython 3.14 | macOS 11.0+ ARM64 | Details |
| mjbatch-0.1.4-cp313-cp313-win_amd64.whl | CPython 3.13 | CPython 3.13 | Windows x86-64 | Details |
| mjbatch-0.1.4-cp313-cp313-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl | CPython 3.13 | CPython 3.13 | Linux glibc 2.28+ x86-64, Linux glibc 2.27+ x86-64 | Details |
| mjbatch-0.1.4-cp313-cp313-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl | CPython 3.13 | CPython 3.13 | Linux glibc 2.28+ ARM64, Linux glibc 2.26+ ARM64 | Details |
| mjbatch-0.1.4-cp313-cp313-macosx_11_0_arm64.whl | CPython 3.13 | CPython 3.13 | macOS 11.0+ ARM64 | Details |
| mjbatch-0.1.4-cp312-cp312-win_amd64.whl | CPython 3.12 | CPython 3.12 | Windows x86-64 | Details |
| mjbatch-0.1.4-cp312-cp312-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl | CPython 3.12 | CPython 3.12 | Linux glibc 2.27+ x86-64, Linux glibc 2.28+ x86-64 | Details |
| mjbatch-0.1.4-cp312-cp312-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl | CPython 3.12 | CPython 3.12 | Linux glibc 2.26+ ARM64, Linux glibc 2.28+ ARM64 | Details |
| mjbatch-0.1.4-cp312-cp312-macosx_11_0_arm64.whl | CPython 3.12 | CPython 3.12 | macOS 11.0+ ARM64 | Details |
| mjbatch-0.1.4-cp311-cp311-win_amd64.whl | CPython 3.11 | CPython 3.11 | Windows x86-64 | Details |
| mjbatch-0.1.4-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl | CPython 3.11 | CPython 3.11 | Linux glibc 2.28+ x86-64, Linux glibc 2.27+ x86-64 | Details |
| mjbatch-0.1.4-cp311-cp311-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl | CPython 3.11 | CPython 3.11 | Linux glibc 2.28+ ARM64, Linux glibc 2.26+ ARM64 | Details |
| mjbatch-0.1.4-cp311-cp311-macosx_11_0_arm64.whl | CPython 3.11 | CPython 3.11 | macOS 11.0+ ARM64 | Details |
| mjbatch-0.1.4-cp310-cp310-win_amd64.whl | CPython 3.10 | CPython 3.10 | Windows x86-64 | Details |
| mjbatch-0.1.4-cp310-cp310-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl | CPython 3.10 | CPython 3.10 | Linux glibc 2.28+ x86-64, Linux glibc 2.27+ x86-64 | Details |
| mjbatch-0.1.4-cp310-cp310-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl | CPython 3.10 | CPython 3.10 | Linux glibc 2.28+ ARM64, Linux glibc 2.26+ ARM64 | Details |
| mjbatch-0.1.4-cp310-cp310-macosx_11_0_arm64.whl | CPython 3.10 | CPython 3.10 | macOS 11.0+ ARM64 | Details |
Total release size: 3.9 MB
Release files / mjbatch-0.1.4.tar.gz
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