PyPI · #1238 most downloaded on PyPI

locust

2.46.613M downloads/molocustio/locust ↗New releases in your daily digest, changelog included.

Developer-friendly load testing framework

Last release today
17 Sep 2026
Ships on a steady schedule
a new release about every 2 weeks
Nearly every release is documented
notes for 60 of the last 60 stable releases
1 version withdrawn
withdrawn after publishing
6 years old
1040 releases · first in 2020

Release timeline

1040 releases since 2020

2020202120222023202420252026

20202026

One column per quarter.

Releases

2.44.5.dev198 Jul 2026pre-release
Nothing published for this version
2.44.5.dev158 Jul 2026pre-release
Nothing published for this version
2.44.5.dev118 Jul 2026pre-release
Nothing published for this version
2.44.5.dev98 Jul 2026pre-release
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2.44.5.dev78 Jul 2026pre-release

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2.44.5.dev530 Jun 2026pre-release

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2.44.5.dev329 Jun 2026pre-release

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2.44.5.dev226 Jun 2026pre-release

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2.44.418 Jun 2026

docs: fix typos by @juliosuas in #3426

What's Changed

docs: fix typos by @juliosuas in #3426
fix: reject partially-matched timespan strings in parse_timespan by @JSap0914 in #3425
Other minor doc fixes

New Contributors

@JSap0914 made their first contribution in #3425

Full Changelog: 2.44.3...2.44.4

Open source →

Additional notes

Full Changelog

Merged pull requests:

docs: fix typos #3426 (juliosuas)
fix: reject partially-matched timespan strings in parse_timespan #3425 (JSap0914)

Open source →

2.44.4.dev818 Jun 2026pre-release

Nothing published for this version

2.44.4.dev518 Jun 2026pre-release

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2.44.4.dev316 Jun 2026pre-release

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2.44.4.dev216 Jun 2026pre-release

Nothing published for this version

2.44.312 Jun 2026

(fix build fail in 2.44.2, no real changes)

Full Changelog: 2.44.2...2.44.3

Open source →

Additional notes

Full Changelog

Open source →

2.44.3.dev112 Jun 2026pre-release

Nothing published for this version

2.44.2.dev611 Jun 2026pre-release

Nothing published for this version

2.44.2.dev26 Jun 2026pre-release

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2.44.11 Jun 2026

up pre-commit 3.xx to 4.xxx by @even-even in #3412

What's Changed

up pre-commit 3.xx to 4.xxx by @even-even in #3412
Add aiolocust and azure load testing to docs by @cyberw in #3414
docs: guard custom web routes without web UI by @puneetdixit200 in #3416
Add hostname, locustfile and profile to otel Resource by @cyberw in #3420
Add logging support to for OTEL by @cyberw in #3421

New Contributors

@puneetdixit200 made their first contribution in #3416

Full Changelog: 2.44.0...2.44.1

Open source →

Additional notes

Full Changelog

Merged pull requests:

Add logging support to for OTEL #3421 (cyberw)
Add hostname, locustfile and profile to otel Resource #3420 (cyberw)
docs: guard custom web routes without web UI #3416 (puneetdixit200)
Add aiolocust and azure load testing to docs #3414 (cyberw)
up pre-commit 3.xx to 4.xxx #3412 (even-even)

Open source →

Additional notes

Docs updates: Mention aiolocust and azure load testing, https://github.com/locustio/locust/pull/3414, guard custom web routes without web UI https://github.com/locustio/locust/pull/3416
Add logging support to for OTEL, update OTEL resource https://github.com/locustio/locust/pull/3421, https://github.com/locustio/locust/pull/3420

Open source →

2.44.1.dev391 Jun 2026pre-release

Nothing published for this version

2.44.1.dev381 Jun 2026pre-release

Nothing published for this version

2.44.1.dev361 Jun 2026pre-release

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2.44.1.dev3531 May 2026pre-release

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2.44.1.dev3431 May 2026pre-release

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2.44.1.dev2019 May 2026pre-release

Nothing published for this version

2.44.1.dev1919 May 2026pre-release

Nothing published for this version

2.44.1.dev1818 May 2026pre-release

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2.44.1.dev1718 May 2026pre-release

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2.44.1.dev615 May 2026pre-release

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2.44.1.dev312 May 2026pre-release

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2.44.1.dev212 May 2026pre-release

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2.44.011 May 2026

fix(fasthttp): catch FAILURE_EXCEPTIONS during response body read by @jorgetamayo21 in #3397

What's Changed

fix(fasthttp): catch FAILURE_EXCEPTIONS during response body read by @jorgetamayo21 in #3397
Fix FastHttpUser crash on Python 3.13+ due to GC collecting dict reference cycle by @armorbreak001 in #3398
Add first seen / last seen timestamps to failure stats by @tugkanboz in #3403
fix(fasthttp): handle zlib.error for truncated gzip streams under high load by @jorgetamayo21 in #3405
fix(fasthttp): add 308 to redirect_resonse_codes in LocustUserAgent by @jorgetamayo21 in #3406
Disable UI lib npm package publication by @cyberw in #3408
Add AI-optimized documentation (llms.txt) by @nk-tedo-001 in #3399
feat(contrib): add CsvRequestLogger for per-request CSV logging by @AKIB473 in #3404
unify ruff in pyproject.toml and pre-commits by @even-even in #3409

New Contributors

@jorgetamayo21 made their first contribution in #3397
@armorbreak001 made their first contribution in #3398
@tugkanboz made their first contribution in #3403
@nk-tedo-001 made their first contribution in #3399
@AKIB473 made their first contribution in #3404
@even-even made their first contribution in #3409

Full Changelog: 2.43.4...2.44.0

Open source →

Additional notes

Full Changelog

Fixed bugs:

FastHttpUser crashes with TypeError: on_request() missing 4 required positional arguments on Python 3.13+ #3388

Closed issues:

Show when each failure was first and last seen in the Failures tab #3402
Add CSV Export of Detailed Request Logs #3389
[Docs] Publish AI-optimized documentation #3372

Merged pull requests:

unify ruff in pyproject.toml and pre-commits #3409 (even-even)
Disable UI lib npm package publication #3408 (cyberw)
fix(fasthttp): add 308 to redirect_resonse_codes in LocustUserAgent #3406 (jorgetamayo21)
fix(fasthttp): handle zlib.error for truncated gzip streams under high load #3405 (jorgetamayo21)
Add first seen / last seen timestamps to failure stats #3403 (tugkanboz)
Add AI-optimized documentation (llms.txt) #3399 (nk-tedo-001)
Fix FastHttpUser crash on Python 3.13+ due to GC collecting __dict__ reference cycle #3398 (armorbreak001)
fix(fasthttp): catch FAILURE_EXCEPTIONS during response body read #3397 (jorgetamayo21)

Additional notes

Add first seen / last seen timestamps to failure stats https://github.com/locustio/locust/pull/3403
Various fixes for FastHttpUser (https://github.com/locustio/locust/pull/3398, https://github.com/locustio/locust/pull/3405, https://github.com/locustio/locust/pull/3406, https://github.com/locustio/locust/pull/3397)
Add AI-optimized documentation (llms.txt) https://github.com/locustio/locust/pull/3399
Add CsvRequestLogger for per-request CSV logging https://github.com/locustio/locust/pull/3404

Open source →

2.43.5.dev3111 May 2026pre-release

Nothing published for this version

2.43.5.dev259 May 2026pre-release

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2.43.5.dev219 May 2026pre-release

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2.43.5.dev198 May 2026pre-release

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2.43.5.dev133 May 2026pre-release

Nothing published for this version

2.43.5.dev1028 Apr 2026pre-release

Nothing published for this version

2.43.41 Apr 2026

adding mqtt user feature that works around the paho mqtt 340 connections limit issue by @ionutab in https://github.com/locustio/locust/pull/3268

What's Changed

adding mqtt user feature that works around the paho mqtt 340 connections limit issue by @ionutab in https://github.com/locustio/locust/pull/3268
Unset print_stats on workers created by --processes option by @markogle in https://github.com/locustio/locust/pull/3353
Add Qdrant support by @Anush008 in https://github.com/locustio/locust/pull/3354
Bump qdrant-client from 1.16.2 to 1.17.0 by @dependabot[bot] in https://github.com/locustio/locust/pull/3362
Bump sphinxcontrib-htmlhelp from 2.0.1 to 2.1.0 by @dependabot[bot] in https://github.com/locustio/locust/pull/3359
Bump sphinxcontrib-serializinghtml from 1.1.10 to 2.0.0 by @dependabot[bot] in https://github.com/locustio/locust/pull/3361
Bump snowballstemmer from 2.2.0 to 3.0.1 by @dependabot[bot] in https://github.com/locustio/locust/pull/3358
Bump the all_dependencies group with 2 updates by @dependabot[bot] in https://github.com/locustio/locust/pull/3356
Extract response time bucketing into an overridable function by @thessem in https://github.com/locustio/locust/pull/3373
Improve Type Hinting for Wait Time Functions by @abstract-333 in https://github.com/locustio/locust/pull/3374
Bump the eslint group in /locust/webui with 8 updates by @dependabot[bot] in https://github.com/locustio/locust/pull/3363
Bump the vite group in /locust/webui with 2 updates by @dependabot[bot] in https://github.com/locustio/locust/pull/3364
Bump typescript from 5.7.2 to 5.9.3 in /locust/webui by @dependabot[bot] in https://github.com/locustio/locust/pull/3367
Bump the vite group across 1 directory with 3 updates by @dependabot[bot] in https://github.com/locustio/locust/pull/3375
Add locust-otel Docker image with OpenTelemetry dependencies by @eyupcanakman in https://github.com/locustio/locust/pull/3379
Fix typos in docs, docstrings, and UI string by @r266-tech in https://github.com/locustio/locust/pull/3381
Fix false "--run-time limit reached" log message when shape test completes by @Krishnachaitanyakc in https://github.com/locustio/locust/pull/3382
fix: use total_rps instead of current_rps in HTML report and navbar stats by @juliosuas in https://github.com/locustio/locust/pull/3384

New Contributors

@markogle made their first contribution in https://github.com/locustio/locust/pull/3353
@Anush008 made their first contribution in https://github.com/locustio/locust/pull/3354
@thessem made their first contribution in https://github.com/locustio/locust/pull/3373
@abstract-333 made their first contribution in https://github.com/locustio/locust/pull/3374
@eyupcanakman made their first contribution in https://github.com/locustio/locust/pull/3379
@r266-tech made their first contribution in https://github.com/locustio/locust/pull/3381
@Krishnachaitanyakc made their first contribution in https://github.com/locustio/locust/pull/3382
@juliosuas made their first contribution in https://github.com/locustio/locust/pull/3384

Full Changelog: https://github.com/locustio/locust/compare/2.43.3...2.43.4

Open source →

Additional notes

Full Changelog

Fixed bugs:

HTML report uses current_rps instead of total_rps for req/s column #3355
Using --processes with --print-stats causes all workers to print stats #3352
Docker image does not have OTEL libraries installed #3309

Merged pull requests:

fix: use total_rps instead of current_rps in HTML report and navbar stats #3384 (juliosuas)
Fix false "--run-time limit reached" log message when shape test completes #3382 (Krishnachaitanyakc)
Fix typos in docs, docstrings, and UI string #3381 (r266-tech)
Add locust-otel Docker image with OpenTelemetry dependencies #3379 (eyupcanakman)
Bump the vite group across 1 directory with 3 updates #3375 (dependabot[bot])
Improve Type Hinting for Wait Time Functions #3374 (abstract-333)
Extract response time bucketing into an overridable function #3373 (thessem)
Bump typescript from 5.7.2 to 5.9.3 in /locust/webui #3367 (dependabot[bot])
Bump the vite group in /locust/webui with 2 updates #3364 (dependabot[bot])
Bump the eslint group in /locust/webui with 8 updates #3363 (dependabot[bot])
Bump qdrant-client from 1.16.2 to 1.17.0 #3362 (dependabot[bot])
Bump sphinxcontrib-serializinghtml from 1.1.10 to 2.0.0 #3361 (dependabot[bot])
Bump sphinxcontrib-htmlhelp from 2.0.1 to 2.1.0 #3359 (dependabot[bot])
Bump snowballstemmer from 2.2.0 to 3.0.1 #3358 (dependabot[bot])
Bump the all_dependencies group with 2 updates #3356 (dependabot[bot])
Add Qdrant support #3354 (Anush008)
Unset print_stats on workers created by --processes option #3353 (markogle)
adding mqtt user feature that works around the paho mqtt 340 connections limit issue #3268 (ionutab)

Additional notes

MqttUser: Work around the paho mqtt 340 connections limit https://github.com/locustio/locust/pull/3268
Add Qdrant support https://github.com/locustio/locust/pull/3354
Extract response time bucketing into an overridable function https://github.com/locustio/locust/pull/3373
Add locust-otel Docker image with OpenTelemetry dependencies https://github.com/locustio/locust/pull/3379
Fix false "--run-time limit reached" log message when shape test completes https://github.com/locustio/locust/pull/3382
fix: use total_rps instead of current_rps in HTML report and navbar stats https://github.com/locustio/locust/pull/3384
Bump various dependencies

Open source →

2.43.4.dev551 Apr 2026pre-release

Nothing published for this version

2.43.4.dev5225 Mar 2026pre-release

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2.43.4.dev5024 Mar 2026pre-release

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2.43.4.dev4822 Mar 2026pre-release

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2.43.4.dev4319 Mar 2026pre-release

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2.43.4.dev4119 Mar 2026pre-release

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2.43.4.dev4019 Mar 2026pre-release

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2.43.4.dev3919 Mar 2026pre-release

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2.43.4.dev3819 Mar 2026pre-release

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2.43.4.dev3619 Mar 2026pre-release

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2.43.4.dev3319 Mar 2026pre-release

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2.43.4.dev3118 Mar 2026pre-release

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2.43.4.dev2513 Mar 2026pre-release

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2.43.4.dev192 Mar 2026pre-release

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2.43.4.dev172 Mar 2026pre-release

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2.43.4.dev152 Mar 2026pre-release

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2.43.4.dev131 Mar 2026pre-release

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2.43.4.dev111 Mar 2026pre-release

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2.43.4.dev1021 Feb 2026pre-release

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2.43.4.dev717 Feb 2026pre-release

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2.43.4.dev512 Feb 2026pre-release

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2.43.4.dev112 Feb 2026pre-release

Nothing published for this version

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