crates.io · #32 most downloaded on crates.io

smallvec

1.16.21.3B downloads/moservo/rust-smallvec ↗New releases in your daily digest, changelog included.

'Small vector' optimization: store up to a small number of items on the stack

Last release 5 days ago
03 Oct 2026
Release timing varies
gaps range from 8 days to 7 months
Rarely documented
notes for 7 of 48 stable releases
20 versions withdrawn
withdrawn after publishing
12 years old
83 releases · first in 2015

Release timeline

83 releases since 2015

2015201720192021

Releases

2.0.0-beta.23 Oct 2026pre-releaseDeprecated
Deprecate into_vec and into_boxed_slice in favor of Into by @Ashutosh-Panda2004 in #685
What's Changed

Move Drain iterator into its own module by @Kxrma47 in #628

fix: correct bounds of unsafe send and sync implementation by @fereidani in #630

Move ExtractIf iterator into its own module by @Kxrma47 in #629

Add = Global to public structs with A: Allocator by @bolshoytoster in #634

ci: remove the SmallBot workflow by @Denimworld12 in #641

refactor: new error system by @alejandro-vaz in #624

fix: length overflow on non-64-bit ZST by @alejandro-vaz in #625

docs: add allocator feature notice by @alejandro-vaz in #626

docs: stronger no AI notice by @alejandro-vaz in #651

feat: kill may dangle by @alejandro-vaz in #652

policy: update encase by @alejandro-vaz in #653

refactor: simpler raw by @alejandro-vaz in #637

Make reserve derive from try_reserve by @bolshoytoster in #659

style: rename alloc to allocator by @Denimworld12 in #660

refactor: rename TaggedLen field to length by @Denimworld12 in #661

ci: new CI by @alejandro-vaz in #644

feat: new allocator features by @alejandro-vaz in #656

Move IntoIter iterator into its own module by @Kxrma47 in #666

Move Splice iterator into its own module by @Kxrma47 in #667

Re-implement fuzzing via libfuzzer by @pedrodesu in #658

Add From implementations for Vec and Box<[T]> by @shuaixr in #649

refactor: manual location setting by @alejandro-vaz in #672

refactor: move slice range by @alejandro-vaz in #671

Fix fuzzing problems by @pedrodesu in #676

ci: integrate callgrind benchmarks using iai-callgrind by @Zul-Qarnain in #675

Implement Index and IndexMut traits by @mikwielgus in #679

Update fuzzing workflow by @pedrodesu in #677

Optimize fuzzing runs for memory by @pedrodesu in #680

fuzz: use inline table for smallvec dependency by @Ashutosh-Panda2004 in #684

Deprecate into_vec and into_boxed_slice in favor of Into by @Ashutosh-Panda2004 in #685

chore: bump version by @alejandro-vaz in #687

refactor: rename src to source and dst to destination by @GauravPawar101 in #691

refactor: rename TaggedLen to LocatedLength by @GauravPawar101 in #689

chore: add .github/CONTRIBUTING.md by @GauravPawar101 in #690

New Contributors

@Kxrma47 made their first contribution in #628

@Denimworld12 made their first contribution in #641

@shuaixr made their first contribution in #649

@Zul-Qarnain made their first contribution in #675

@mikwielgus made their first contribution in #679

@Ashutosh-Panda2004 made their first contribution in #684

Full Changelog: v2.0.0-beta.1...v2.0.0-beta.2

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v2.0.0-beta.2 Pre-release

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2.0.0-beta.120 Sept 2026pre-releaseDeprecated

Remove the use of the deprecated smallvec macro by @TDecking in #589

What's Changed

chore: bump version, regenerate lockfile by @alejandro-vaz in #568
Refactor: Modularize mod spec_traits into a specialization.rs file by @pedrodesu in #575
Added clippy to CI and made minor code improvements by @pedrodesu in #576
Refactor: Add add/sub to TaggedLen (#570) by @iamjaeholee in #572
Implement try_with_capacity and improve with_capacity by @bolshoytoster in #574
refactor: improve taggedlen maintainability and logic by @fereidani in #578
Splice and push_mut/insert_mut undefined behavior fix by @fereidani in #586
perf: remove index panic code generation from ExtractIf next by @fereidani in #587
Refactor PartialEq implementations by @TDecking in #588
Remove the use of the deprecated smallvec macro by @TDecking in #589
docs(readme): add warning about AI contributions by @Dazzanova in #595
Add SmallVec::into_raw_parts by @TDecking in #591
docs: added feature descriptions to README by @alejandro-vaz in #580
Correct iterator collection and partial-retention benchmarks by @charliermarsh in #597
Add custom allocator support by @bolshoytoster in #592
Fix panic safety when reserving during splice by @charliermarsh in #593
refactor: create src/iterators/ folder and move rayon.rs (closes #598) by @rushikeshgarad2024-dev in #600
Add testing and benchmarking steps with --no-default-features by @pedrodesu in #610
Remove deprecated usage in benches/bench.rs by @pedrodesu in #611
fix: overflow on length on not-64-bit by @alejandro-vaz in #616
Improve some code related to specialization by @TDecking in #618
Refactor the benchmark suite by @TDecking in #619
chore: bump version by @alejandro-vaz in #615

New Contributors

@pedrodesu made their first contribution in #575
@iamjaeholee made their first contribution in #572
@rushikeshgarad2024-dev made their first contribution in #600

Full Changelog: v2.0.0-alpha.13...v2.0.0-beta.1

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v2.0.0-beta.1 Pre-release

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2.0.0-alpha.133 Sept 2026pre-releaseDeprecated

Deprecate smallvec! and smallvec_inline! by @bolshoytoster in #445

What's Changed

chore: fix some typos in comments by @luohewuyang in #399
Exclude development script from Cargo publishing by @weiznich in #400
Improved const evaluation for ZST checks. by @ErisianArchitect in #401
extract_if no longer requires a feature gate. by @mbrubeck in #383
chore: small v2 cleanup by @alejandro-vaz in #421
Refactor v2: faster pop/reserve/retain_mut, modern Criterion benches, Miri-friendly tests + fmt in CI by @fereidani in #396
Revert "Refactor v2: faster pop/reserve/retain_mut, modern Criterion benches, Miri-friendly tests + fmt in CI" by @alejandro-vaz in #430
Reduce bloat from smallvec! in the inline case by @bolshoytoster in #424
feat: drop bincode entirely by @alejandro-vaz in #426
Make RawSmallVec (and its fields) public only under feature = "internals". (v2) by @zachs18 in #348
feat: added style CI check && replaced serde_json with serde_test by @alejandro-vaz in #434
feat: added rustfmt.toml by @alejandro-vaz in #437
Fix try_grow_raw lead memory leak by @dDostalker in #450
chore: added wiki to readme by @alejandro-vaz in #442
Deprecate smallvec! and smallvec_inline! by @bolshoytoster in #445
Added SmallVec::push_mut andSmallVec::insert_mut by @mematthias in #406
docs: update v2 status links by @bpiper02 in #454
#396 recovery by @fereidani in #456
ci: build docs with all features on nightly by @ITSMERNB in #460
docs: separate repository README by @anisayakmitra-in in #465
ci: simplified CI workflow and removed unnecessary miri script by @alejandro-vaz in #467
ci: use default Rust workflow by @Nidhi-Gahlawat in #477
Implement TryFrom<SmallVec<T, N>> for [T; M] by @bolshoytoster in #482
ci: added smallbot experiment by @alejandro-vaz in #466
docs: added AGENTS.md by @alejandro-vaz in #462
docs: cleaner SoC in readme's by @alejandro-vaz in #469
fix: smallbot specify github repository by @alejandro-vaz in #483
docs: added code of conduct mirroring servo by @alejandro-vaz in #464
Turn all tests into integration tests by @TDecking in #495
Implement arbitrary::Arbitrary for SmallVec by @Jorge-Polanco-Roque in #496
docs: tell agents to link to servo contributing guidelines by @alejandro-vaz in #504
fix: added since and note for deprecations by @alejandro-vaz in #488
style: updated rustfmt.toml guidelines by @alejandro-vaz in #490
feat: added borsh serialize by @alejandro-vaz in #486
feat: implement Format for SmallVec by @alejandro-vaz in #472
fix: cargo warnings by @alejandro-vaz in #487
docs: stop using deprecated smallvec! macro in README example by @painbaba in #520
chore: upgraded MSRV to 1.86, edition 2024, and criterion 0.8 by @alejandro-vaz in #507
ci: added dependabot by @alejandro-vaz in #517
fix: removed test_ prefix by @alejandro-vaz in #508
refactor: modularized macros by @alejandro-vaz in #509
feat: added borsh schema by @alejandro-vaz in #506
refactor: no test-level imports by @alejandro-vaz in #510
fix: refactor taggedlen/rawsmallvec and visibility by @alejandro-vaz in #512
refactor: initial lib.rs refactor by @alejandro-vaz in #516
chore: remove unsafe warnings by @alejandro-vaz in #525
chore: regenerate Cargo.lock by @alejandro-vaz in #524
perf/fix: retain mut algorithm by @fereidani in #519
added expectations to #[should_panic] tests by @prakrititz in #521
fixed dependabot by @616b73 in #529
fix(deps): pin dependency versions in Cargo.toml by @Dazzanova in #534
fix: unpin dep versions by @alejandro-vaz in #540
Fix deprecation message by @bolshoytoster in #543
docs: add v2 active core contributors by @Dazzanova in #546
clean artifacts before benchmarking by @malezjaa in #549
Add rayon support by @bolshoytoster in #548
perf: reduce binary size by optimizing panic formatting by @fereidani in #536
refactor: split Eq/Ord and From/TryFrom impls out of lib.rs by @Dazzanova in #545
ci: update actions/checkout to v7 by @Dazzanova in #552
chore: removed unnecessary borsh feature by @alejandro-vaz in #531
refactor: removed is_zst helper by @alejandro-vaz in #533
feat: added borsh deserialize and tests by @alejandro-vaz in #530
perf: improved bench settings performance by @alejandro-vaz in #535
refactor: refactored errors by @alejandro-vaz in #558
perf: increment/decrement len without reading on heap flag by @fereidani in #547
perf: reduce scope of ptr in retain_mut by @fereidani in #563
style: apply clippy suggestions by @fereidani in #564
Add support for encase by @bolshoytoster in #565
perf: extend_fallback optimization by @fereidani in #567

New Contributors

@luohewuyang made their first contribution in #399
@ErisianArchitect made their first contribution in #401
@fereidani made their first contribution in #396
@dDostalker made their first contribution in #450
@mematthias made their first contribution in #406
@bpiper02 made their first contribution in #454
@ITSMERNB made their first contribution in #460
@anisayakmitra-in made their first contribution in #465
@Nidhi-Gahlawat made their first contribution in #477
@Jorge-Polanco-Roque made their first contribution in #496
@painbaba made their first contribution in #520
@prakrititz made their first contribution in #521
@616b73 made their first contribution in #529
@Dazzanova made their first contribution in #534
@malezjaa made their first contribution in #549

Full Changelog: v2.0.0-alpha.12...v2.0.0-alpha.13

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v2.0.0-alpha.13 Pre-release

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2.0.0-alpha.1216 Nov 2025pre-release

Fix typo in comment by @waywardmonkeys in #372

What's Changed

Fix typo in comment by @waywardmonkeys in #372
Constant new SmallVec<T, N> for arrays smaller than N by @otcova in #377
v2: Bump MSRV to 1.83 by @mbrubeck in #378
Unconditionally implement core::error::Error by @TDecking in #380
Update the extract_if feature by @TDecking in #381
Add missing Vec functionality by @TDecking in #382
Shrink code produced by smallvec![]. by @nnethercote in #385
Rework specialization by @TDecking in #384
Switch serde dependency to serde_core for v2 by @paolobarbolini in #393
Fix: SmallVec::leak() to panic on inline storage (GHSA-5h7v-3586-wm8c) by @ksj1230

New Contributors

@ksj1230 made their first contribution in GHSA-5h7v-3586-wm8c
@otcova made their first contribution in #377
@TDecking made their first contribution in #380
@paolobarbolini made their first contribution in #393

Full Changelog: v2.0.0-alpha.11...v2.0.0-alpha.12

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v2.0.0-alpha.12 Pre-release

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2.0.0-alpha.1120 Mar 2025pre-release

Implement MallocSizeOf for SmallVec (v2) by @nicoburns in #369

What's Changed

Implement MallocSizeOf for SmallVec (v2) by @nicoburns in #369
feat: impl bytes::BufMut for SmallVec (v2) by @BugenZhao in #371

New Contributors

@BugenZhao made their first contribution in #371

Full Changelog: v2.0.0-alpha.10...v2.0.0-alpha.11

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2.0.0-alpha.1015 Jan 2025pre-release

Impl Send/Sync for IntoIter by @mbrubeck in #368

What's Changed

Impl Send/Sync for IntoIter by @mbrubeck in #368

Full Changelog: v2.0.0-alpha.9...v2.0.0-alpha.10

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2.0.0-alpha.917 Dec 2024pre-release

Fix a bug in collect / from_iter / extend ( #365 ).

Fix a bug in collect/from_iter/extend (#365).

Full Changelog: v2.0.0-alpha.8...v2.0.0-alpha.9

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v2.0.0-alpha.9 Pre-release

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2.0.0-alpha.810 Dec 2024pre-release

[v2] Update to Rust 2021 Edition. by @zachs18 in #359

What's Changed

[v2] Update to Rust 2021 Edition. by @zachs18 in #359
Micro optimize extend by @arthurprs in #362
Implement spare_capacity_mut by @DaniPopes in #364

New Contributors

@DaniPopes made their first contribution in #364

Full Changelog: v2.0.0-alpha.7...v2.0.0-alpha.8

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v2.0.0-alpha.8 Pre-release

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2.0.0-alpha.727 Jul 2024pre-releaseBreaking

[Breaking Change] replace write feature with std feature by @JarvisCraft in #356

What's Changed

[Breaking Change] replace write feature with std feature by @JarvisCraft in #356
Add PartialEq impls to mirror the stdlib by @SUPERCILEX in #358

New Contributors

@JarvisCraft made their first contribution in #356
@SUPERCILEX made their first contribution in #358

Full Changelog: v2.0.0-alpha.6...v2.0.0-alpha.7

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v2.0.0-alpha.7 Pre-release

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2.0.0-alpha.610 May 2024pre-release

Nothing published for this version

2.0.0-alpha.523 Mar 2024pre-release

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2.0.0-alpha.43 Mar 2024pre-release

Nothing published for this version

2.0.0-alpha.320 Jan 2024pre-release

Nothing published for this version

2.0.0-alpha.214 Jan 2024pre-release

Nothing published for this version

2.0.0-alpha.17 Nov 2023pre-release

Nothing published for this version

1.16.225 Sept 2026

Backport v2’s retain implementation to v1 by @charliermarsh in #596

What's Changed

Backport v2’s retain implementation to v1 by @charliermarsh in #596
Fix element ownership tracking with may_dangle by @charliermarsh in #594
Fix Cargo manual_readme warning by @Rayan-and-beyond in #608
chore: bump version by @alejandro-vaz in #617

New Contributors

@Rayan-and-beyond made their first contribution in #608

Full Changelog: v1.16.1...v1.16.2

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1.16.111 Sept 2026

Speed up push by expanding triple_mut by @bolshoytoster in #557

What's Changed

Speed up push by expanding triple_mut by @bolshoytoster in #557
chore: bump version to 1.16.1 by @ryux1 in #585
fix: doc warning by @alejandro-vaz in #582
fix: cargo warnings by @alejandro-vaz in #581

New Contributors

@ryux1 made their first contribution in #585

Full Changelog: v1.16.0...v1.16.1

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1.16.01 Sept 2026

Include debug_metadata/*.natvis in the published crate to fix debugger_visualizer/docs.rs build by @teddytennant in #417

What's Changed

Include debug_metadata/*.natvis in the published crate to fix debugger_visualizer/docs.rs build by @teddytennant in #417
feat: removed debugger visualizer + tests by @alejandro-vaz in #420
feat: added style check to CI && rustfmt.toml by @alejandro-vaz in #436

New Contributors

@teddytennant made their first contribution in #417

Full Changelog: v1.15.2...v1.16.0

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v1.16.0

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1.15.211 Jun 2026

Exclude development script from cargo packaging by @weiznich in #397

What's Changed

Exclude development script from cargo packaging by @weiznich in #397
Fix use-after-free in DrainFilter::keep_rest for SmallVec with capacity 0 by @Shnatsel in #407
Work around rustc 1.93 perf regression with MaybeUninit by @glandium in #410

New Contributors

@Shnatsel made their first contribution in #407
@glandium made their first contribution in #410

Full Changelog: v1.15.1...v1.15.2

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1.15.16 Jun 2025

Shrink code produced by smallvec![] . by @nnethercote in #386

What's Changed

Shrink code produced by smallvec![]. by @nnethercote in #386

Full Changelog: v1.15.0...v1.15.1

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v1.15.1

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1.15.05 Apr 2025

Fix typos by @waywardmonkeys in #373

What's Changed

Fix typos by @waywardmonkeys in #373
Implement bincode2 encode/decode support for smallvec v1 by @markbt in #375

New Contributors

@markbt made their first contribution in #375

Full Changelog: v1.14.0...v1.15.0

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1.14.015 Feb 2025

Implement MallocSizeOf for SmallVec (v1) by @nicoburns in #370

What's Changed

Implement MallocSizeOf for SmallVec (v1) by @nicoburns in #370

New Contributors

@nicoburns made their first contribution in #370

Full Changelog: v1.13.2...v1.14.0

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1.13.220 Mar 2024

Nothing published for this version

1.13.119 Jan 2024

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1.13.018 Jan 2024withdrawn

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1.12.013 Jan 2024

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1.11.29 Nov 2023

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1.11.120 Sept 2023

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1.11.05 Jul 2023

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1.10.02 Oct 2022

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1.9.029 Jun 2022

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1.8.124 Jun 2022

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1.8.014 Jan 2022

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1.7.028 Sept 2021

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1.6.18 Jan 2021

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1.6.031 Dec 2020

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1.5.15 Dec 2020

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1.5.017 Nov 2020

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1.4.211 Aug 2020

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1.4.16 Jul 2020

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1.4.023 Apr 2020withdrawn

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1.3.08 Apr 2020

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1.2.029 Jan 2020

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1.1.020 Dec 2019

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1.0.03 Nov 2019

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0.6.148 Jan 2021

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0.6.135 Nov 2019

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0.6.1230 Oct 2019

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0.6.1128 Oct 2019

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0.6.1010 Jun 2019

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0.6.917 Feb 2019withdrawn

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0.6.819 Jan 2019withdrawn

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0.6.729 Nov 2018withdrawn

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0.6.616 Nov 2018withdrawn

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0.6.522 Aug 2018withdrawn

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0.6.46 Aug 2018withdrawn

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0.6.319 Jul 2018withdrawn

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0.6.214 Jun 2018withdrawn

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0.6.123 Apr 2018withdrawn

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0.6.01 Dec 2017withdrawn

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