Time to First Byte
Measure HTTP time to first byte and repeat until interrupted.
Install
pip install lupaxa-time-to-first-byte
time-to-first-byte --help
CLI
time-to-first-byte --url https://example.com --count 5
ttfb -u https://example.com --delay 1 --timeout 5
python -m lupaxa.time_to_first_byte --version
The tool resolves the host, connects, negotiates TLS for HTTPS, sends an HTTP
request, and measures the time until the first response byte. It follows up to
10 redirects by default and repeats every second until Ctrl-C unless --count
is set.
Library
from lupaxa.time_to_first_byte import measure, run_measurements
one = measure("https://example.com", timeout=5.0)
print(one.ok, one.status, one.ttfb_ms)
summary = run_measurements("https://example.com", count=3, delay=0)
print(summary.total, summary.passed, summary.failed)
Development
make init
make python-install-dev
make python-check
make mkdocs-serve
Documentation
The published guide is at https://time-to-first-byte.thelupaxaproject.org/.
Site Markdown lives in mkdocs/.
1 maintainer
Release files for lupaxa-time-to-first-byte 0.1.2
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| lupaxa_time_to_first_byte-0.1.2.tar.gz | 8.7 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| lupaxa_time_to_first_byte-0.1.2-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 19.2 kB
Release files / lupaxa_time_to_first_byte-0.1.2.tar.gz
| Download URL | lupaxa_time_to_first_byte-0.1.2.tar.gz |
|---|---|
| Size | 8.7 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
a9eb684b3eff337998c73d427e2c6875954c155622865816e4836631fae49a9b
|
|
BLAKE2b-256 checksum How to use checksums |
f67e856425a0946dbcef1a892f88cbc2a220f5e74e4d43859a160dc3e0722da3
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Sep 25, 2026.
Transparency logRelease files / lupaxa_time_to_first_byte-0.1.2-py3-none-any.whl
| Download URL | lupaxa_time_to_first_byte-0.1.2-py3-none-any.whl |
|---|---|
| Size | 10.5 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
55bf65997f5045c474f51cb4e2b639480dac07478e6b5e757f55be988f618954
|
|
BLAKE2b-256 checksum How to use checksums |
6c47fcf10edc1179a28544705da88f2247154750bd2c1fe42a45d90bc11e3656
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Sep 25, 2026.
Transparency log
