fastuuid
Python bindings to Rust's UUID library.
Decision gist · record as of 2026-08-14
Yes, if you generate UUIDs at scale or need UUID v7 support. The permissive BSD license, zero runtime dependencies, precompiled wheels, and recent repository activity make it low-risk. Maintenance is aging (last release 299 days ago), so verify the project remains active for your Python version before committing to a long-term dependency. For typical low-volume UUID use, the standard library is sufficient.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.8 or later; compiled wheels available for most platforms, but source builds require a Rust toolchain.
- Medium install friction due to compiled wheels; prebuilt binaries available for common platforms (macOS, Linux, Windows) and Python versions 3.8–3.14.
- Repository shows recent activity (last commit 2025-10-19) and is not archived, though maintenance status is aging.
License · maintenance · safety
permissive license (permissive) — Licensed under BSD (permissive), allowing free use, modification, and distribution with minimal restrictions.
last release 2025-10-19 (299 days) · last repo commit 2025-10-19 · 187 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 94,946,095 downloads/mo, #358 on PyPI
Alternatives
Verify before relying
pip install fastuuid
import fastuuid
uuid_obj = fastuuid.uuid4()
print(uuid_obj)- Whether uuid4_bulk() GIL-release behavior provides measurable throughput gains in typical multi-threaded workloads.
- How strict hexadecimal parsing differs from the standard library in edge cases.
- Performance characteristics on platforms beyond x86_64 (e.g., ARM, RISC-V).
What it is and what it does
FastUUID is a Rust-backed UUID library for Python that replaces the standard library's pure-Python implementation with compiled bindings. It generates and parses UUIDs faster and enforces stricter validation of hexadecimal input. The library supports UUID versions 1, 3, 4, 5, and 7, and exposes an API compatible with Python's builtin UUID class, making it a drop-in replacement for performance-critical code.
The package includes a `uuid4_bulk()` function that releases the GIL during batch UUID generation, allowing other threads to run concurrently. It is distributed as precompiled wheels for Python 3.8 through 3.14 on macOS, Linux, and Windows, eliminating the need to compile from source on most systems.
Use it for
- Replace standard library UUID calls in high-throughput services that generate thousands of UUIDs per second.
- Generate large batches of random UUIDs in multi-threaded applications using uuid4_bulk() to avoid GIL contention.
- Validate and parse UUID strings with stricter hexadecimal checking than the standard library.
- Migrate existing code using Python's uuid module without rewriting the calling interface.
- Build systems that require UUID v7 support, which is not available in Python's standard library.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you generate UUIDs at scale or need UUID v7 support.
The permissive BSD license, zero runtime dependencies, precompiled wheels, and recent repository activity make it low-risk. Maintenance is aging (last release 299 days ago), so verify the project remains active for your Python version before committing to a long-term dependency. For typical low-volume UUID use, the standard library is sufficient.
Install
fastuuid on PyPI
Before you install
Medium install friction due to compiled wheels; prebuilt binaries available for common platforms (macOS, Linux, Windows) and Python versions 3.8–3.14. Repository shows recent activity (last commit 2025-10-19) and is not archived, though maintenance status is aging.
Requires Python 3.8 or later; compiled wheels available for most platforms, but source builds require a Rust toolchain.
License in practice
Licensed under BSD (permissive), allowing free use, modification, and distribution with minimal restrictions.
Quickstart
pip install fastuuid
import fastuuid
uuid_obj = fastuuid.uuid4()
print(uuid_obj)Verify before relying
- Whether uuid4_bulk() GIL-release behavior provides measurable throughput gains in typical multi-threaded workloads.
- How strict hexadecimal parsing differs from the standard library in edge cases.
- Performance characteristics on platforms beyond x86_64 (e.g., ARM, RISC-V).
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.8 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | None |
| Maintenance | Aging 299 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 94,946,095 / month, #358 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 4 - BetaLicense :: OSI Approved :: BSD LicenseProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Programming Language :: Python :: Implementation :: CPythonProgramming Language :: RustTopic :: Software Development :: LibrariesTopic :: Software Development :: Libraries :: Python Modules |
Evidence: fastuuid-0.14.0-cp310-cp310-macosx_10_12_x86_64.macosx_11_0_arm64.macosx_10_12_universal2.whl; fastuuid-0.14.0-cp310-cp310-macosx_10_12_x86_64.whl; fastuuid-0.14.0-cp310-cp310-macosx_11_0_arm64.whl; fastuuid-0.14.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl; fastuuid-0.14.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; fastuuid-0.14.0-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.whl; fastuuid-0.14.0-cp310-cp310-musllinux_1_1_aarch64.whl; fastuuid-0.14.0-cp310-cp310-musllinux_1_1_i686.whl; fastuuid-0.14.0-cp310-cp310-musllinux_1_1_x86_64.whl; fastuuid-0.14.0-cp310-cp310-win32.whl; fastuuid-0.14.0-cp310-cp310-win_amd64.whl; fastuuid-0.14.0-cp311-cp311-macosx_10_12_x86_64.macosx_11_0_arm64.macosx_10_12_universal2.whl; fastuuid-0.14.0-cp311-cp311-macosx_10_12_x86_64.whl; fastuuid-0.14.0-cp311-cp311-macosx_11_0_arm64.whl; fastuuid-0.14.0-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl; fastuuid-0.14.0-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; fastuuid-0.14.0-cp311-cp311-manylinux_2_5_i686.manylinux1_i686.whl; fastuuid-0.14.0-cp311-cp311-musllinux_1_1_aarch64.whl; fastuuid-0.14.0-cp311-cp311-musllinux_1_1_i686.whl; fastuuid-0.14.0-cp311-cp311-musllinux_1_1_x86_64.whl
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See also uuid-utils · shortuuid · uuid6 · fastnanoid · uuid7 · uuid-extension · c_uuid_v7 · timeflake · cyksuid · uuid