Speedups

C and Cython extensions for fast STL I/O and PostgreSQL-to-NumPy conversion.

Performance

Cython extensions run ~3x faster than pure Python, consistent across data sizes.

STL I/O Performance

Operation	Facets	Pure Python	speedups	Speedup
Write	10,000	28.5 ms	9.9 ms	2.9x
Read	10,000	21.6 ms	7.0 ms	3.1x
Write	100,000	283.4 ms	89.3 ms	3.2x
Read	100,000	218.7 ms	71.0 ms	3.1x
Write	1,000,000	2.81 s	897.5 ms	3.1x
Read	1,000,000	2.19 s	711.5 ms	3.1x
Write	10,000,000	28.62 s	9.22 s	3.1x
Read	10,000,000	22.03 s	7.32 s	3.0x

PostgreSQL COPY to NumPy Performance

Type	Elements	Pure Python	speedups	Speedup
int32	100K	7.3 ms	2.6 ms	2.8x
int32	1M	73.8 ms	24.8 ms	3.0x
int32	10M	747.5 ms	216.1 ms	3.5x
int32	50M	3.75 s	1.05 s	3.6x
float64	100K	8.0 ms	3.3 ms	2.4x
float64	1M	78.3 ms	32.1 ms	2.4x
float64	10M	786.5 ms	268.5 ms	2.9x
float64	50M	4.01 s	1.31 s	3.1x

_{Benchmarked on Apple M2 Pro, Python 3.14, macOS 15.4. PG data pre-populated in tables to isolate COPY+conversion time. Array dimensionality (1D/2D/3D) has no significant effect on performance.}

Install

pip install speedups

With PostgreSQL support:

pip install speedups[postgres]

PostgreSQL Array → NumPy

Convert PostgreSQL arrays directly to NumPy ndarrays using psycopg's binary COPY protocol. Bypasses Python object creation for a significant speedup over the default loader.

Supports float4, float8, smallint, integer, and bigint arrays, from 1D to N-D.

import psycopg
from speedups.psycopg_loaders import NumpyLoader

with psycopg.connect("dbname=mydb") as conn:
    cursor = conn.cursor(binary=True)
    NumpyLoader.install(cursor)

    query = """
    COPY (
        SELECT array_agg(x)
        FROM generate_series(1, 100000) x
    ) TO STDOUT WITH BINARY
    """

    with cursor.copy(query) as copy:
        copy.set_types(["integer[]"])

        for row in copy.rows():
            print(row)  # numpy.ndarray

ASCII STL I/O

Read and write ASCII STL files at C speed. This module is used internally by numpy-stl — if you want to read or write STL files, use numpy-stl for a full-featured API. The Cython implementation uses direct sscanf/fprintf calls, avoiding Python string overhead entirely.

from speedups.stl import ascii_read, ascii_write

# Read
with open("model.stl", "rb") as f:
    buf = f.read(8192)
    name, mesh = ascii_read(f, buf)

# Write
with open("output.stl", "wb") as f:
    ascii_write(f, b"my_model", mesh)

Supported Types

PostgreSQL	NumPy	Dimensions
`float4`	`float32`	1D – ND
`float8`	`float64`	1D – ND
`smallint`	`int16`	1D – ND
`integer`	`int32`	1D – ND
`bigint`	`int64`	1D – ND

Compatibility

Python 3.10, 3.11, 3.12, 3.13, 3.14
NumPy 1.x and 2.x

License

BSD-3-Clause

Metadata

Release files for speedups 2.2.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for speedups 2.2.0
File	Size	Uploaded
speedups-2.2.0.tar.gz	359.9 kB	Jul 19, 2026	Details

Built distributions (wheels)

Table of built distributions (wheels) for speedups 2.2.0
File	Interpreter	ABI	Platform	Reset
speedups-2.2.0-cp314-cp314t-win_amd64.whl 505.9 kB Jul 19, 2026	CPython 3.14	CPython 3.14 free-threading	Windows x86-64	Details
speedups-2.2.0-cp314-cp314t-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 559.8 kB Jul 19, 2026	CPython 3.14	CPython 3.14 free-threading	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.2.0-cp314-cp314t-macosx_11_0_arm64.whl 522.8 kB Jul 19, 2026	CPython 3.14	CPython 3.14 free-threading	macOS 11.0+ ARM64	Details
speedups-2.2.0-cp314-cp314-win_amd64.whl 494.8 kB Jul 19, 2026	CPython 3.14	CPython 3.14	Windows x86-64	Details
speedups-2.2.0-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 549.3 kB Jul 19, 2026	CPython 3.14	CPython 3.14	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.2.0-cp314-cp314-macosx_11_0_arm64.whl 510.1 kB Jul 19, 2026	CPython 3.14	CPython 3.14	macOS 11.0+ ARM64	Details
speedups-2.2.0-cp313-cp313-win_amd64.whl 489.0 kB Jul 19, 2026	CPython 3.13	CPython 3.13	Windows x86-64	Details
speedups-2.2.0-cp313-cp313-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 544.6 kB Jul 19, 2026	CPython 3.13	CPython 3.13	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.2.0-cp313-cp313-macosx_11_0_arm64.whl 504.9 kB Jul 19, 2026	CPython 3.13	CPython 3.13	macOS 11.0+ ARM64	Details
speedups-2.2.0-cp312-cp312-win_amd64.whl 489.7 kB Jul 19, 2026	CPython 3.12	CPython 3.12	Windows x86-64	Details
speedups-2.2.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 546.3 kB Jul 19, 2026	CPython 3.12	CPython 3.12	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.2.0-cp312-cp312-macosx_11_0_arm64.whl 504.2 kB Jul 19, 2026	CPython 3.12	CPython 3.12	macOS 11.0+ ARM64	Details
speedups-2.2.0-cp311-cp311-win_amd64.whl 485.2 kB Jul 19, 2026	CPython 3.11	CPython 3.11	Windows x86-64	Details
speedups-2.2.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 540.8 kB Jul 19, 2026	CPython 3.11	CPython 3.11	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.2.0-cp311-cp311-macosx_11_0_arm64.whl 499.7 kB Jul 19, 2026	CPython 3.11	CPython 3.11	macOS 11.0+ ARM64	Details
speedups-2.2.0-cp310-cp310-win_amd64.whl 484.9 kB Jul 19, 2026	CPython 3.10	CPython 3.10	Windows x86-64	Details
speedups-2.2.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 548.1 kB Jul 19, 2026	CPython 3.10	CPython 3.10	Linux glibc 2.28+ x86-64, Linux glibc 2.17+ x86-64	Details
speedups-2.2.0-cp310-cp310-macosx_11_0_arm64.whl 503.9 kB Jul 19, 2026	CPython 3.10	CPython 3.10	macOS 11.0+ ARM64	Details

Total release size: 9.6 MB

Release files / speedups-2.2.0.tar.gz

Download URL	speedups-2.2.0.tar.gz
Size	359.9 kB
Tags	Source
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Release files / speedups-2.2.0-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

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Tags	CPython 3.14 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
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Release files / speedups-2.2.0-cp314-cp314-macosx_11_0_arm64.whl

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Release files / speedups-2.2.0-cp313-cp313-win_amd64.whl

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Tags	CPython 3.13 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
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Publishing commit: github.com/wolph/speedups/tree/61065e7ffb30d93833b5ed29677747ee132be533

Workflow

Publishing configuration: github.com/wolph/speedups/blob/61065e7ffb30d93833b5ed29677747ee132be533/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/29701859080/attempts/1

Artifact

Subject: speedups-2.2.0-cp312-cp312-win_amd64.whl
SHA-256 checksum: 550ee9c17d2620357270eda31f248bbc6fe8ba37a32de05c1b36b32abc2248ad Verifying attestations

Release files / speedups-2.2.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

Download URL	speedups-2.2.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
Size	546.3 kB
Tags	CPython 3.12 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
SHA-256 checksum How to use checksums	`7f6c49178f86c16a4a033e2ed7e7f0a8845034963d586b4bd8e9335c7aa7ea5f`
BLAKE2b-256 checksum How to use checksums	`cd7fb23424c8dd6e47ead56c45fc0ca569610ce62bda5236e9d6ba5c3a49bb8c`
Upload date	Jul 19, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/61065e7ffb30d93833b5ed29677747ee132be533

Workflow

Publishing configuration: github.com/wolph/speedups/blob/61065e7ffb30d93833b5ed29677747ee132be533/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/29701859080/attempts/1

Artifact

Subject: speedups-2.2.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
SHA-256 checksum: 7f6c49178f86c16a4a033e2ed7e7f0a8845034963d586b4bd8e9335c7aa7ea5f Verifying attestations

Release files / speedups-2.2.0-cp312-cp312-macosx_11_0_arm64.whl

Download URL	speedups-2.2.0-cp312-cp312-macosx_11_0_arm64.whl
Size	504.2 kB
Tags	CPython 3.12 macOS 11.0+ ARM64
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Upload date	Jul 19, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/61065e7ffb30d93833b5ed29677747ee132be533

Workflow

Publishing configuration: github.com/wolph/speedups/blob/61065e7ffb30d93833b5ed29677747ee132be533/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/29701859080/attempts/1

Artifact

Subject: speedups-2.2.0-cp312-cp312-macosx_11_0_arm64.whl
SHA-256 checksum: 10261325dca534701ac220e23485b3531a5bb23a1a59959f113541ac39cc9385 Verifying attestations

Release files / speedups-2.2.0-cp311-cp311-win_amd64.whl

Download URL	speedups-2.2.0-cp311-cp311-win_amd64.whl
Size	485.2 kB
Tags	CPython 3.11 Windows x86-64
SHA-256 checksum How to use checksums	`153b3793a9bf044d751a8aa2c3edcb80e1fc8ffbb102ab679fb1a29f4df3ca37`
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Upload date	Jul 19, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/61065e7ffb30d93833b5ed29677747ee132be533

Workflow

Publishing configuration: github.com/wolph/speedups/blob/61065e7ffb30d93833b5ed29677747ee132be533/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/29701859080/attempts/1

Artifact

Subject: speedups-2.2.0-cp311-cp311-win_amd64.whl
SHA-256 checksum: 153b3793a9bf044d751a8aa2c3edcb80e1fc8ffbb102ab679fb1a29f4df3ca37 Verifying attestations

Release files / speedups-2.2.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

Download URL	speedups-2.2.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
Size	540.8 kB
Tags	CPython 3.11 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
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Upload date	Jul 19, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/61065e7ffb30d93833b5ed29677747ee132be533

Workflow

Publishing configuration: github.com/wolph/speedups/blob/61065e7ffb30d93833b5ed29677747ee132be533/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/29701859080/attempts/1

Artifact

Subject: speedups-2.2.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
SHA-256 checksum: 8c56950e6e6377b92f82de8854f57ce6e5cbbd6272c99e2d0a9d4c95988e81d3 Verifying attestations

Release files / speedups-2.2.0-cp311-cp311-macosx_11_0_arm64.whl

Download URL	speedups-2.2.0-cp311-cp311-macosx_11_0_arm64.whl
Size	499.7 kB
Tags	CPython 3.11 macOS 11.0+ ARM64
SHA-256 checksum How to use checksums	`2d25a4b06152f77a7362cf5c23ff68bb9208a1fe5a89537b3018beb17768230a`
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Upload date	Jul 19, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/61065e7ffb30d93833b5ed29677747ee132be533

Workflow

Publishing configuration: github.com/wolph/speedups/blob/61065e7ffb30d93833b5ed29677747ee132be533/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/29701859080/attempts/1

Artifact

Subject: speedups-2.2.0-cp311-cp311-macosx_11_0_arm64.whl
SHA-256 checksum: 2d25a4b06152f77a7362cf5c23ff68bb9208a1fe5a89537b3018beb17768230a Verifying attestations

Release files / speedups-2.2.0-cp310-cp310-win_amd64.whl

Download URL	speedups-2.2.0-cp310-cp310-win_amd64.whl
Size	484.9 kB
Tags	CPython 3.10 Windows x86-64
SHA-256 checksum How to use checksums	`9a309cfdc95aad117e2ff152da40149955be11466cda00c6d21efd8051e25c85`
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Upload date	Jul 19, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/61065e7ffb30d93833b5ed29677747ee132be533

Workflow

Publishing configuration: github.com/wolph/speedups/blob/61065e7ffb30d93833b5ed29677747ee132be533/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/29701859080/attempts/1

Artifact

Subject: speedups-2.2.0-cp310-cp310-win_amd64.whl
SHA-256 checksum: 9a309cfdc95aad117e2ff152da40149955be11466cda00c6d21efd8051e25c85 Verifying attestations

Release files / speedups-2.2.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

Download URL	speedups-2.2.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
Size	548.1 kB
Tags	CPython 3.10 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
SHA-256 checksum How to use checksums	`6e143b9e4aac0f84b41e2a04e564f2c598fddb800f6548d4e1af1552aab9ab11`
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Upload date	Jul 19, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/61065e7ffb30d93833b5ed29677747ee132be533

Workflow

Publishing configuration: github.com/wolph/speedups/blob/61065e7ffb30d93833b5ed29677747ee132be533/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/29701859080/attempts/1

Artifact

Subject: speedups-2.2.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
SHA-256 checksum: 6e143b9e4aac0f84b41e2a04e564f2c598fddb800f6548d4e1af1552aab9ab11 Verifying attestations

Release files / speedups-2.2.0-cp310-cp310-macosx_11_0_arm64.whl

Download URL	speedups-2.2.0-cp310-cp310-macosx_11_0_arm64.whl
Size	503.9 kB
Tags	CPython 3.10 macOS 11.0+ ARM64
SHA-256 checksum How to use checksums	`393951aaadb787928f2d344d1cc1970f01834bb7ee4f229b830bc898cbdc50f4`
BLAKE2b-256 checksum How to use checksums	`2e0946f876952208edf92f77f467e1fa34d371f7c805de757546794e5283db5e`
Upload date	Jul 19, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/61065e7ffb30d93833b5ed29677747ee132be533

Workflow

Publishing configuration: github.com/wolph/speedups/blob/61065e7ffb30d93833b5ed29677747ee132be533/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/29701859080/attempts/1

Artifact

Subject: speedups-2.2.0-cp310-cp310-macosx_11_0_arm64.whl
SHA-256 checksum: 393951aaadb787928f2d344d1cc1970f01834bb7ee4f229b830bc898cbdc50f4 Verifying attestations