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 2.0.1

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 2.0.1
File	Size	Uploaded
speedups-2.0.1.tar.gz	281.4 kB	Apr 4, 2026	Details

Built distributions (wheels)

Table of built distributions (wheels) for speedups 2.0.1
File	Interpreter	ABI	Platform	Reset
speedups-2.0.1-cp314-cp314t-win_amd64.whl 415.3 kB Apr 4, 2026	CPython 3.14	CPython 3.14 free-threading	Windows x86-64	Details
speedups-2.0.1-cp314-cp314t-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 444.5 kB Apr 4, 2026	CPython 3.14	CPython 3.14 free-threading	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.0.1-cp314-cp314t-macosx_11_0_arm64.whl 413.6 kB Apr 4, 2026	CPython 3.14	CPython 3.14 free-threading	macOS 11.0+ ARM64	Details
speedups-2.0.1-cp314-cp314-win_amd64.whl 393.8 kB Apr 4, 2026	CPython 3.14	CPython 3.14	Windows x86-64	Details
speedups-2.0.1-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 439.7 kB Apr 4, 2026	CPython 3.14	CPython 3.14	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.0.1-cp314-cp314-macosx_11_0_arm64.whl 403.9 kB Apr 4, 2026	CPython 3.14	CPython 3.14	macOS 11.0+ ARM64	Details
speedups-2.0.1-cp313-cp313-win_amd64.whl 388.7 kB Apr 4, 2026	CPython 3.13	CPython 3.13	Windows x86-64	Details
speedups-2.0.1-cp313-cp313-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 435.0 kB Apr 4, 2026	CPython 3.13	CPython 3.13	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.0.1-cp313-cp313-macosx_11_0_arm64.whl 399.1 kB Apr 4, 2026	CPython 3.13	CPython 3.13	macOS 11.0+ ARM64	Details
speedups-2.0.1-cp312-cp312-win_amd64.whl 389.1 kB Apr 4, 2026	CPython 3.12	CPython 3.12	Windows x86-64	Details
speedups-2.0.1-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 434.9 kB Apr 4, 2026	CPython 3.12	CPython 3.12	Linux glibc 2.28+ x86-64, Linux glibc 2.17+ x86-64	Details
speedups-2.0.1-cp312-cp312-macosx_11_0_arm64.whl 398.1 kB Apr 4, 2026	CPython 3.12	CPython 3.12	macOS 11.0+ ARM64	Details
speedups-2.0.1-cp311-cp311-win_amd64.whl 387.6 kB Apr 4, 2026	CPython 3.11	CPython 3.11	Windows x86-64	Details
speedups-2.0.1-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 434.1 kB Apr 4, 2026	CPython 3.11	CPython 3.11	Linux glibc 2.28+ x86-64, Linux glibc 2.17+ x86-64	Details
speedups-2.0.1-cp311-cp311-macosx_11_0_arm64.whl 397.1 kB Apr 4, 2026	CPython 3.11	CPython 3.11	macOS 11.0+ ARM64	Details
speedups-2.0.1-cp310-cp310-win_amd64.whl 387.8 kB Apr 4, 2026	CPython 3.10	CPython 3.10	Windows x86-64	Details
speedups-2.0.1-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 442.9 kB Apr 4, 2026	CPython 3.10	CPython 3.10	Linux glibc 2.28+ x86-64, Linux glibc 2.17+ x86-64	Details
speedups-2.0.1-cp310-cp310-macosx_11_0_arm64.whl 400.6 kB Apr 4, 2026	CPython 3.10	CPython 3.10	macOS 11.0+ ARM64	Details

Total release size: 7.7 MB

Release files / speedups-2.0.1.tar.gz

Download URL	speedups-2.0.1.tar.gz
Size	281.4 kB
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Tags	CPython 3.14 CPython 3.14 free-threading Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
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Release files / speedups-2.0.1-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

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Size	439.7 kB
Tags	CPython 3.14 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
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Release files / speedups-2.0.1-cp314-cp314-macosx_11_0_arm64.whl

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Size	403.9 kB
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Size	388.7 kB
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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/a06b08bccc11aa541ba54b2878786ad8c990323e

Workflow

Publishing configuration: github.com/wolph/speedups/blob/a06b08bccc11aa541ba54b2878786ad8c990323e/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/23969259279/attempts/1

Artifact

Subject: speedups-2.0.1-cp312-cp312-win_amd64.whl
SHA-256 checksum: 671a0ed21b1bab9943ef4985f71abdadc2f6d7ed8c72e9762d29facb7f74def6 Verifying attestations

Release files / speedups-2.0.1-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

Download URL	speedups-2.0.1-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
Size	434.9 kB
Tags	CPython 3.12 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
SHA-256 checksum How to use checksums	`2b1edce31cb7cfbbfb1959bd8e695ab16d1303ed72094472956a5969ebf93dfd`
BLAKE2b-256 checksum How to use checksums	`7f290812e87e6249757664863db022910b6c2630267d3cad67657e57712e54eb`
Upload date	Apr 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/a06b08bccc11aa541ba54b2878786ad8c990323e

Workflow

Publishing configuration: github.com/wolph/speedups/blob/a06b08bccc11aa541ba54b2878786ad8c990323e/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/23969259279/attempts/1

Artifact

Subject: speedups-2.0.1-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
SHA-256 checksum: 2b1edce31cb7cfbbfb1959bd8e695ab16d1303ed72094472956a5969ebf93dfd Verifying attestations

Release files / speedups-2.0.1-cp312-cp312-macosx_11_0_arm64.whl

Download URL	speedups-2.0.1-cp312-cp312-macosx_11_0_arm64.whl
Size	398.1 kB
Tags	CPython 3.12 macOS 11.0+ ARM64
SHA-256 checksum How to use checksums	`ce78b2e94112b0191e15bf37960395f212082d57e0c17511eae002b4086c34b5`
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Upload date	Apr 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/a06b08bccc11aa541ba54b2878786ad8c990323e

Workflow

Publishing configuration: github.com/wolph/speedups/blob/a06b08bccc11aa541ba54b2878786ad8c990323e/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/23969259279/attempts/1

Artifact

Subject: speedups-2.0.1-cp312-cp312-macosx_11_0_arm64.whl
SHA-256 checksum: ce78b2e94112b0191e15bf37960395f212082d57e0c17511eae002b4086c34b5 Verifying attestations

Release files / speedups-2.0.1-cp311-cp311-win_amd64.whl

Download URL	speedups-2.0.1-cp311-cp311-win_amd64.whl
Size	387.6 kB
Tags	CPython 3.11 Windows x86-64
SHA-256 checksum How to use checksums	`e64dd7d0e7e4e2ce19caa99a6f3d712e6a3c70a2daa0a12ca77f5b4b6cf2db73`
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Upload date	Apr 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/a06b08bccc11aa541ba54b2878786ad8c990323e

Workflow

Publishing configuration: github.com/wolph/speedups/blob/a06b08bccc11aa541ba54b2878786ad8c990323e/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/23969259279/attempts/1

Artifact

Subject: speedups-2.0.1-cp311-cp311-win_amd64.whl
SHA-256 checksum: e64dd7d0e7e4e2ce19caa99a6f3d712e6a3c70a2daa0a12ca77f5b4b6cf2db73 Verifying attestations

Release files / speedups-2.0.1-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

Download URL	speedups-2.0.1-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
Size	434.1 kB
Tags	CPython 3.11 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
SHA-256 checksum How to use checksums	`680c79a46daa5093524ad9300500b0f9b2af8525acc77a134f920ad4627db384`
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Upload date	Apr 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/a06b08bccc11aa541ba54b2878786ad8c990323e

Workflow

Publishing configuration: github.com/wolph/speedups/blob/a06b08bccc11aa541ba54b2878786ad8c990323e/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/23969259279/attempts/1

Artifact

Subject: speedups-2.0.1-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
SHA-256 checksum: 680c79a46daa5093524ad9300500b0f9b2af8525acc77a134f920ad4627db384 Verifying attestations

Release files / speedups-2.0.1-cp311-cp311-macosx_11_0_arm64.whl

Download URL	speedups-2.0.1-cp311-cp311-macosx_11_0_arm64.whl
Size	397.1 kB
Tags	CPython 3.11 macOS 11.0+ ARM64
SHA-256 checksum How to use checksums	`218a1b349c82a07b0926ea4f898fbb29134af2536d1961bf77044080e30abb2a`
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Upload date	Apr 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/a06b08bccc11aa541ba54b2878786ad8c990323e

Workflow

Publishing configuration: github.com/wolph/speedups/blob/a06b08bccc11aa541ba54b2878786ad8c990323e/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/23969259279/attempts/1

Artifact

Subject: speedups-2.0.1-cp311-cp311-macosx_11_0_arm64.whl
SHA-256 checksum: 218a1b349c82a07b0926ea4f898fbb29134af2536d1961bf77044080e30abb2a Verifying attestations

Release files / speedups-2.0.1-cp310-cp310-win_amd64.whl

Download URL	speedups-2.0.1-cp310-cp310-win_amd64.whl
Size	387.8 kB
Tags	CPython 3.10 Windows x86-64
SHA-256 checksum How to use checksums	`6c483fa70b79b08fc0a49e912a50d360572a788c93d9535387671c1502ad1ba2`
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Upload date	Apr 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/a06b08bccc11aa541ba54b2878786ad8c990323e

Workflow

Publishing configuration: github.com/wolph/speedups/blob/a06b08bccc11aa541ba54b2878786ad8c990323e/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/23969259279/attempts/1

Artifact

Subject: speedups-2.0.1-cp310-cp310-win_amd64.whl
SHA-256 checksum: 6c483fa70b79b08fc0a49e912a50d360572a788c93d9535387671c1502ad1ba2 Verifying attestations

Release files / speedups-2.0.1-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

Download URL	speedups-2.0.1-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
Size	442.9 kB
Tags	CPython 3.10 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
SHA-256 checksum How to use checksums	`d65ff4784865352aebeee6449367b03d2e228e6e8359b1f7938ec6251d1a1a4e`
BLAKE2b-256 checksum How to use checksums	`726ce0ab7e1b9231dd9cb1e4ff5fb4f67b90b6b5e872bd440ddf8b20a74aaa92`
Upload date	Apr 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/a06b08bccc11aa541ba54b2878786ad8c990323e

Workflow

Publishing configuration: github.com/wolph/speedups/blob/a06b08bccc11aa541ba54b2878786ad8c990323e/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/23969259279/attempts/1

Artifact

Subject: speedups-2.0.1-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
SHA-256 checksum: d65ff4784865352aebeee6449367b03d2e228e6e8359b1f7938ec6251d1a1a4e Verifying attestations

Release files / speedups-2.0.1-cp310-cp310-macosx_11_0_arm64.whl

Download URL	speedups-2.0.1-cp310-cp310-macosx_11_0_arm64.whl
Size	400.6 kB
Tags	CPython 3.10 macOS 11.0+ ARM64
SHA-256 checksum How to use checksums	`0e6cfa0c8288137a5044dc60c165076b1dcc15648258853810ba9ca123917069`
BLAKE2b-256 checksum How to use checksums	`096f98ac7c7995a87b4cd658c68c512abab6df2f94ebcf7d6a587c7871d00616`
Upload date	Apr 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.7`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/a06b08bccc11aa541ba54b2878786ad8c990323e

Workflow

Publishing configuration: github.com/wolph/speedups/blob/a06b08bccc11aa541ba54b2878786ad8c990323e/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/23969259279/attempts/1

Artifact

Subject: speedups-2.0.1-cp310-cp310-macosx_11_0_arm64.whl
SHA-256 checksum: 0e6cfa0c8288137a5044dc60c165076b1dcc15648258853810ba9ca123917069 Verifying attestations