PyPI · #1189 most downloaded on PyPI

locust

2.46.79.9M downloads/molocustio/locust ↗New releases in your daily digest, changelog included.

Developer-friendly load testing framework

Last release today
04 Oct 2026
Ships on a steady schedule
a new release about every 2 weeks
Nearly every release is documented
notes for 59 of the last 60 stable releases
1 version withdrawn
withdrawn after publishing
6 years old
1050 releases · first in 2020

Release timeline

1050 releases since 2020

2020202120222023202420252026

20202026

One column per quarter.

Releases

2.46.74 Oct 2026
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2.46.7.dev244 Oct 2026pre-release
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2.46.7.dev223 Oct 2026pre-release
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2.46.7.dev213 Oct 2026pre-release
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2.46.7.dev193 Oct 2026pre-release

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2.46.7.dev173 Oct 2026pre-release

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2.46.7.dev133 Oct 2026pre-release

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2.46.7.dev113 Oct 2026pre-release

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2.46.7.dev93 Oct 2026pre-release

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2.46.7.dev726 Sept 2026pre-release

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2.46.7.dev217 Sept 2026pre-release

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2.46.617 Sept 2026

Add wait_time.poisson() for Poisson-distributed task arrivals by @whr313703 in #3510

What's Changed

Add wait_time.poisson() for Poisson-distributed task arrivals by @whr313703 in #3510
Add rest method to HttpUser by @anandghegde in #3512
Compute Med. with the same rank as the 50% percentile by @gyanu2507 in #3508
[DX] Improve error message when Web UI assets are missing by @suraj-self in #3514
chore: add typos linter by @even-even in #3511
Don't let a spawning_complete from an unknown worker kill client_listener by @ergdevops in #3516

New Contributors

@whr313703 made their first contribution in #3510
@anandghegde made their first contribution in #3512
@gyanu2507 made their first contribution in #3508
@suraj-self made their first contribution in #3514
@ergdevops made their first contribution in #3516

Full Changelog: 2.46.5...2.46.6

Open source →

2.46.6.dev1217 Sept 2026pre-release

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2.46.6.dev1015 Sept 2026pre-release

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2.46.6.dev815 Sept 2026pre-release

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2.46.6.dev414 Sept 2026pre-release

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2.46.6.dev213 Sept 2026pre-release

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2.46.57 Sept 2026

docs: remove stale Python 3.9 test output by @liuyaohui666 in #3500

What's Changed

docs: remove stale Python 3.9 test output by @liuyaohui666 in #3500
fix: fix pythonVersion in ruffConfig and fix extend-exclude setting by @even-even in #3504
Fix Web UI 500 error handler crashing on plain exceptions by @reachsridhard in #3502
Fix User.stop() crash when greenlet hasn't started yet by @reachsridhard in #3506
[FIX] : correct the user count metric for distributed runs by @RamachandraBhardwaj in #3507

New Contributors

@liuyaohui666 made their first contribution in #3500

Full Changelog: 2.46.4...2.46.5

Open source →

2.46.5.dev87 Sept 2026pre-release

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2.46.5.dev66 Sept 2026pre-release

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2.46.5.dev526 Aug 2026pre-release

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2.46.5.dev426 Aug 2026pre-release

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2.46.5.dev224 Aug 2026pre-release

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2.46.424 Aug 2026

Fix FastHttpUser streaming response_length using wrong header key by @reachsridhard in #3492

What's Changed

Fix FastHttpUser streaming response_length using wrong header key by @reachsridhard in #3492
fix: exclude missing workers from new dispatches by @ShiroKSH in #3489
Re-enable tests using Python 3.15. Update uv.lock by @cyberw in #3494
docs: add inspect.software health badge by @Nayjest in #3495
build(deps): bump postcss from 8.5.16 to 8.5.26 in /locust/webui by @dependabot[bot] in #3496
build(deps): bump brace-expansion from 1.1.16 to 1.1.18 in /locust/webui by @dependabot[bot] in #3497
build(deps-dev): bump cryptography from 48.0.1 to 50.0.0 by @dependabot[bot] in #3498
Fix master stopping test prematurely when a missing worker quits by @reachsridhard in #3501

New Contributors

@ShiroKSH made their first contribution in #3489
@Nayjest made their first contribution in #3495

Full Changelog: 2.46.3...2.46.4

Open source →

2.46.4.dev2221 Aug 2026pre-release

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2.46.4.dev1820 Aug 2026pre-release

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2.46.4.dev1720 Aug 2026pre-release

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2.46.4.dev1520 Aug 2026pre-release

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2.46.4.dev919 Aug 2026pre-release

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2.46.31 Aug 2026

Fix variable shadowing in _aggregate_dispatched_users by @reachsridhard in #3484

What's Changed

Fix variable shadowing in _aggregate_dispatched_users by @reachsridhard in #3484
[FEAT] : add active user metric as an observable gauge by @RamachandraBhardwaj in #3483
Explicitly close csv file handles before exit by @reachsridhard in #3486
Fix url possibly unbound in headless non-worker mode by @reachsridhard in #3488
Update uv to 0.12 by @cyberw in #3487

New Contributors

@RamachandraBhardwaj made their first contribution in #3483

Full Changelog: 2.46.2...2.46.3

Open source →

Additional notes

Full Changelog

Fixed bugs:

Workers spawned by --processes crash when using --csv-full-history #3428

Merged pull requests:

Fix url possibly unbound in headless non-worker mode #3488 (reachsridhard)
Update uv to 0.12 #3487 (cyberw)
Explicitly close csv file handles before exit #3486 (reachsridhard)
Fix variable shadowing in _aggregate_dispatched_users #3484 (reachsridhard)
[FEAT] : add active user metric as an observable gauge #3483 (RamachandraBhardwaj)

Open source →

2.46.3.dev91 Aug 2026pre-release

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2.46.3.dev71 Aug 2026pre-release

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2.46.3.dev429 Jul 2026pre-release

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2.46.224 Jul 2026

Fix response time percentiles being deflated by requests logged with response_time=None by @haskiindahouse in #3473

What's Changed

Fix response time percentiles being deflated by requests logged with response_time=None by @haskiindahouse in #3473
Change StatsEntry typing to not allow None for stats by @reachsridhard in #3476
build(deps): bump shell-quote from 1.8.1 to 1.10.0 in /locust/webui by @dependabot[bot] in #3471
build(deps): bump brace-expansion from 1.1.12 to 1.1.16 in /locust/webui by @dependabot[bot] in #3478
build(deps): bump tar from 7.5.7 to 7.5.22 in /locust/webui by @dependabot[bot] in #3477
build(deps): bump minimatch from 3.1.2 to 3.1.5 in /locust/webui by @dependabot[bot] in #3479
build(deps): bump picomatch from 2.3.1 to 2.3.2 in /locust/webui by @dependabot[bot] in #3480
build(deps-dev): bump cryptography from 46.0.7 to 48.0.1 by @dependabot[bot] in #3481

New Contributors

@haskiindahouse made their first contribution in #3473

Full Changelog: 2.46.1...2.46.2

Open source →

Additional notes

Full Changelog

Closed issues:

get_response_time_percentile counts None (async) requests in the denominator, deflating all reported percentiles #3472

Merged pull requests:

build(deps-dev): bump cryptography from 46.0.7 to 48.0.1 #3481 (dependabot[bot])
build(deps): bump picomatch from 2.3.1 to 2.3.2 in /locust/webui #3480 (dependabot[bot])
build(deps): bump minimatch from 3.1.2 to 3.1.5 in /locust/webui #3479 (dependabot[bot])
build(deps): bump brace-expansion from 1.1.12 to 1.1.16 in /locust/webui #3478 (dependabot[bot])
build(deps): bump tar from 7.5.7 to 7.5.22 in /locust/webui #3477 (dependabot[bot])
Change StatsEntry typing to not allow None for stats #3476 (reachsridhard)
Fix response time percentiles being deflated by requests logged with response_time=None #3473 (haskiindahouse)
build(deps): bump shell-quote from 1.8.1 to 1.10.0 in /locust/webui #3471 (dependabot[bot])

Open source →

2.46.2.dev2024 Jul 2026pre-release

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2.46.2.dev1824 Jul 2026pre-release

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2.46.2.dev1624 Jul 2026pre-release

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2.46.2.dev1424 Jul 2026pre-release

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2.46.2.dev1224 Jul 2026pre-release

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2.46.2.dev1024 Jul 2026pre-release

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2.46.2.dev622 Jul 2026pre-release

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2.46.2.dev521 Jul 2026pre-release

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2.46.121 Jul 2026

Remove support for Python 3.10 by @cyberw in #3468

What's Changed

Remove support for Python 3.10 by @cyberw in #3468
Allow new gevent versions by @cyberw in #3470
Update swarm state with extraOptions by @yukha-dw in #3469

New Contributors

@yukha-dw made their first contribution in #3469

Full Changelog: 2.46.0...2.46.1

Open source →

Additional notes

Full Changelog

Closed issues:

[Feature-Request][Web UI] Preserve Custom Parameters/Options values during edit #3462

Merged pull requests:

Allow new gevent versions #3470 (cyberw)
Update swarm state with extraOptions #3469 (yukha-dw)
Remove support for Python 3.10 #3468 (cyberw)

Open source →

2.46.1.dev1620 Jul 2026pre-release

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2.46.1.dev1420 Jul 2026pre-release

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2.46.1.dev1320 Jul 2026pre-release

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2.46.1.dev1120 Jul 2026pre-release

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2.46.1.dev520 Jul 2026pre-release

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2.46.1.dev419 Jul 2026pre-release

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2.46.019 Jul 2026

build(deps-dev): bump sphinxcontrib-applehelp from 1.0.4 to 2.0.0 by @dependabot [bot] in #3445

What's Changed

build(deps-dev): bump sphinxcontrib-applehelp from 1.0.4 to 2.0.0 by @dependabot[bot] in #3445
fix: proper_round gives wrong result for integer inputs when digits > 0 by @JSap0914 in #3431
minor improvements to type hinting by @cyberw in #3457
chore: add support python3.15 by @even-even in #3460
docs: fix class-picker json() example and clarify behavior by @reachsridhard in #3459
Move --csv-full-history validation before process forking by @reachsridhard in #3461
Fix two exception handling bugs by @reachsridhard in #3464
skip python3.15 tests by @even-even in #3466

New Contributors

@reachsridhard made their first contribution in #3459

Full Changelog: 2.45.0...2.46.0

Open source →

Additional notes

Full Changelog

Closed issues:

Unexpected Behaviour When Using the json Method with --class-picker #3435
parse_options() emits deprecation warning via print() instead of warnings.warn(DeprecationWarning) #3433
proper_round gives wrong result for integer inputs when digits > 0 #3430
Code quality observations (3 high priority) #3427

Merged pull requests:

skip python3.15 tests #3466 (even-even)
Fix two exception handling bugs #3464 (reachsridhard)
Move --csv-full-history validation before process forking #3461 (reachsridhard)
chore: add support python3.15 #3460 (even-even)
docs: fix class-picker json() example and clarify behavior #3459 (reachsridhard)
minor improvements to type hinting #3457 (cyberw)
build(deps-dev): bump sphinxcontrib-applehelp from 1.0.4 to 2.0.0 #3445 (dependabot[bot])
fix: proper_round gives wrong result for integer inputs when digits > 0 #3431 (JSap0914)

2.45.1.dev3519 Jul 2026pre-release

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2.45.1.dev3318 Jul 2026pre-release

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2.45.1.dev2914 Jul 2026pre-release

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2.45.1.dev2412 Jul 2026pre-release

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2.45.1.dev2212 Jul 2026pre-release

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2.45.1.dev139 Jul 2026pre-release

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2.45.1.dev129 Jul 2026pre-release

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2.45.1.dev119 Jul 2026pre-release

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2.45.1.dev89 Jul 2026pre-release

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2.45.1.dev79 Jul 2026pre-release

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