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 2.1.0

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 2.1.0
File	Size	Uploaded
speedups-2.1.0.tar.gz	282.1 kB	Apr 10, 2026	Details

Built distributions (wheels)

Table of built distributions (wheels) for speedups 2.1.0
File	Interpreter	ABI	Platform	Reset
speedups-2.1.0-cp314-cp314t-win_amd64.whl 416.1 kB Apr 10, 2026	CPython 3.14	CPython 3.14 free-threading	Windows x86-64	Details
speedups-2.1.0-cp314-cp314t-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 445.3 kB Apr 10, 2026	CPython 3.14	CPython 3.14 free-threading	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.1.0-cp314-cp314t-macosx_11_0_arm64.whl 414.3 kB Apr 10, 2026	CPython 3.14	CPython 3.14 free-threading	macOS 11.0+ ARM64	Details
speedups-2.1.0-cp314-cp314-win_amd64.whl 394.5 kB Apr 10, 2026	CPython 3.14	CPython 3.14	Windows x86-64	Details
speedups-2.1.0-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 440.5 kB Apr 10, 2026	CPython 3.14	CPython 3.14	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.1.0-cp314-cp314-macosx_11_0_arm64.whl 404.7 kB Apr 10, 2026	CPython 3.14	CPython 3.14	macOS 11.0+ ARM64	Details
speedups-2.1.0-cp313-cp313-win_amd64.whl 389.4 kB Apr 10, 2026	CPython 3.13	CPython 3.13	Windows x86-64	Details
speedups-2.1.0-cp313-cp313-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 435.8 kB Apr 10, 2026	CPython 3.13	CPython 3.13	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.1.0-cp313-cp313-macosx_11_0_arm64.whl 399.9 kB Apr 10, 2026	CPython 3.13	CPython 3.13	macOS 11.0+ ARM64	Details
speedups-2.1.0-cp312-cp312-win_amd64.whl 389.8 kB Apr 10, 2026	CPython 3.12	CPython 3.12	Windows x86-64	Details
speedups-2.1.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 435.7 kB Apr 10, 2026	CPython 3.12	CPython 3.12	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.1.0-cp312-cp312-macosx_11_0_arm64.whl 398.9 kB Apr 10, 2026	CPython 3.12	CPython 3.12	macOS 11.0+ ARM64	Details
speedups-2.1.0-cp311-cp311-win_amd64.whl 388.3 kB Apr 10, 2026	CPython 3.11	CPython 3.11	Windows x86-64	Details
speedups-2.1.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 434.9 kB Apr 10, 2026	CPython 3.11	CPython 3.11	Linux glibc 2.28+ x86-64, Linux glibc 2.17+ x86-64	Details
speedups-2.1.0-cp311-cp311-macosx_11_0_arm64.whl 397.9 kB Apr 10, 2026	CPython 3.11	CPython 3.11	macOS 11.0+ ARM64	Details
speedups-2.1.0-cp310-cp310-win_amd64.whl 388.6 kB Apr 10, 2026	CPython 3.10	CPython 3.10	Windows x86-64	Details
speedups-2.1.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl 443.7 kB Apr 10, 2026	CPython 3.10	CPython 3.10	Linux glibc 2.17+ x86-64, Linux glibc 2.28+ x86-64	Details
speedups-2.1.0-cp310-cp310-macosx_11_0_arm64.whl 401.4 kB Apr 10, 2026	CPython 3.10	CPython 3.10	macOS 11.0+ ARM64	Details

Total release size: 7.7 MB

Release files / speedups-2.1.0.tar.gz

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Release files / speedups-2.1.0-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

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Uploaded via	`twine/6.1.0 CPython/3.13.12`

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Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/67a9602a08341247ca457f372774064b4d7e3b9a

Workflow

Publishing configuration: github.com/wolph/speedups/blob/67a9602a08341247ca457f372774064b4d7e3b9a/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/24237609081/attempts/1

Artifact

Subject: speedups-2.1.0-cp312-cp312-win_amd64.whl
SHA-256 checksum: bd87256281aadb1dc583adfcea2cd51d9eadd6c2136584c11f75cbb79b0d2c86 Verifying attestations

Release files / speedups-2.1.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

Download URL	speedups-2.1.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
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Tags	CPython 3.12 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
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Upload date	Apr 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.12`

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Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/67a9602a08341247ca457f372774064b4d7e3b9a

Workflow

Publishing configuration: github.com/wolph/speedups/blob/67a9602a08341247ca457f372774064b4d7e3b9a/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/24237609081/attempts/1

Artifact

Subject: speedups-2.1.0-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
SHA-256 checksum: 03aff6b1c4b7d24cdc166c21df7361abe77b5901e3bd13274882bc8e8851fc09 Verifying attestations

Release files / speedups-2.1.0-cp312-cp312-macosx_11_0_arm64.whl

Download URL	speedups-2.1.0-cp312-cp312-macosx_11_0_arm64.whl
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Upload date	Apr 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.12`

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Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/67a9602a08341247ca457f372774064b4d7e3b9a

Workflow

Publishing configuration: github.com/wolph/speedups/blob/67a9602a08341247ca457f372774064b4d7e3b9a/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/24237609081/attempts/1

Artifact

Subject: speedups-2.1.0-cp312-cp312-macosx_11_0_arm64.whl
SHA-256 checksum: d84b9dc279081022e3ee9bb9ecaac6c9256f31c33abe4692a804887460a28b1f Verifying attestations

Release files / speedups-2.1.0-cp311-cp311-win_amd64.whl

Download URL	speedups-2.1.0-cp311-cp311-win_amd64.whl
Size	388.3 kB
Tags	CPython 3.11 Windows x86-64
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Upload date	Apr 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.12`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/67a9602a08341247ca457f372774064b4d7e3b9a

Workflow

Publishing configuration: github.com/wolph/speedups/blob/67a9602a08341247ca457f372774064b4d7e3b9a/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/24237609081/attempts/1

Artifact

Subject: speedups-2.1.0-cp311-cp311-win_amd64.whl
SHA-256 checksum: 5cda8ed554d603a88e14317c4e4bb264b4575da830fbace682af07aece84517d Verifying attestations

Release files / speedups-2.1.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

Download URL	speedups-2.1.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
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Tags	CPython 3.11 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
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Upload date	Apr 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.12`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/67a9602a08341247ca457f372774064b4d7e3b9a

Workflow

Publishing configuration: github.com/wolph/speedups/blob/67a9602a08341247ca457f372774064b4d7e3b9a/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/24237609081/attempts/1

Artifact

Subject: speedups-2.1.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
SHA-256 checksum: d8d3731e8222d830dd6a676642cf506e843de1efb0a0d524e3a8c36befa51906 Verifying attestations

Release files / speedups-2.1.0-cp311-cp311-macosx_11_0_arm64.whl

Download URL	speedups-2.1.0-cp311-cp311-macosx_11_0_arm64.whl
Size	397.9 kB
Tags	CPython 3.11 macOS 11.0+ ARM64
SHA-256 checksum How to use checksums	`216ad20c7144f6b67a440aa0b9340dafc2b8cff114f7d2a8be0e0859f16524a3`
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Upload date	Apr 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.12`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/67a9602a08341247ca457f372774064b4d7e3b9a

Workflow

Publishing configuration: github.com/wolph/speedups/blob/67a9602a08341247ca457f372774064b4d7e3b9a/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/24237609081/attempts/1

Artifact

Subject: speedups-2.1.0-cp311-cp311-macosx_11_0_arm64.whl
SHA-256 checksum: 216ad20c7144f6b67a440aa0b9340dafc2b8cff114f7d2a8be0e0859f16524a3 Verifying attestations

Release files / speedups-2.1.0-cp310-cp310-win_amd64.whl

Download URL	speedups-2.1.0-cp310-cp310-win_amd64.whl
Size	388.6 kB
Tags	CPython 3.10 Windows x86-64
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Upload date	Apr 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.12`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/67a9602a08341247ca457f372774064b4d7e3b9a

Workflow

Publishing configuration: github.com/wolph/speedups/blob/67a9602a08341247ca457f372774064b4d7e3b9a/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/24237609081/attempts/1

Artifact

Subject: speedups-2.1.0-cp310-cp310-win_amd64.whl
SHA-256 checksum: fa0e47bf437d443f8b375ce10a9fb482b76d372f1d38983ee517dc182c3e22ee Verifying attestations

Release files / speedups-2.1.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl

Download URL	speedups-2.1.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
Size	443.7 kB
Tags	CPython 3.10 Linux glibc 2.17+ x86-64 Linux glibc 2.28+ x86-64
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Upload date	Apr 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.12`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/67a9602a08341247ca457f372774064b4d7e3b9a

Workflow

Publishing configuration: github.com/wolph/speedups/blob/67a9602a08341247ca457f372774064b4d7e3b9a/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/24237609081/attempts/1

Artifact

Subject: speedups-2.1.0-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
SHA-256 checksum: d4c887be8c02586a4adc977f6215b4d95e3b629c8eed373550b5b4240f15dcc1 Verifying attestations

Release files / speedups-2.1.0-cp310-cp310-macosx_11_0_arm64.whl

Download URL	speedups-2.1.0-cp310-cp310-macosx_11_0_arm64.whl
Size	401.4 kB
Tags	CPython 3.10 macOS 11.0+ ARM64
SHA-256 checksum How to use checksums	`1e996e37a9ba42908a171a015843782fd5b70bbb86c0d794d3b993385d9ae92d`
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Upload date	Apr 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.12`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/wolph/speedups
Publishing commit: github.com/wolph/speedups/tree/67a9602a08341247ca457f372774064b4d7e3b9a

Workflow

Publishing configuration: github.com/wolph/speedups/blob/67a9602a08341247ca457f372774064b4d7e3b9a/.github/workflows/build_wheels.yml
Publishing logs: github.com/wolph/speedups/actions/runs/24237609081/attempts/1

Artifact

Subject: speedups-2.1.0-cp310-cp310-macosx_11_0_arm64.whl
SHA-256 checksum: 1e996e37a9ba42908a171a015843782fd5b70bbb86c0d794d3b993385d9ae92d Verifying attestations