Cysharp/MemoryPack

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Zero encoding extreme performance binary serializer for C# and Unity.

Stars: 4.7k
Forks: 313
Open beginner issues: 0
Indexed issues: 17

Dominant language: C#
License: MIT
Last GitHub push: Jul 8, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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17 open issues indexed

Avoid assuming BCL private field layouts via Unsafe.As (List<T>, Stack<T>, BitArray, ImmutableArray<T>) Open

Cysharp/MemoryPack#460 · 1 assignee · Opened Sep 17, 2026
NullReferenceException on parallel Deserialize Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

Cysharp/MemoryPack#458 · Opened Sep 4, 2026
Support a custom ArrayPool Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Cysharp/MemoryPack#457 · Opened Aug 30, 2026
.net 11 Unions Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cysharp/MemoryPack#456 · 1 reaction · Opened Aug 7, 2026
Support collectible AssemblyLoadContext with an instance-scoped serialization context Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

Cysharp/MemoryPack#453 · Opened Jul 19, 2026
[benchmark] Request for call-path / fairness review (GLD.SerializerBenchmark) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cysharp/MemoryPack#452 · Opened Jul 17, 2026
Proposal: Support ref struct buffer writers via allows ref struct constraint (.NET 9+) Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Cysharp/MemoryPack#447 · Opened Jun 19, 2026
unity confilct Open

Difficulty 3/5 1-2 days Newbie friendliness 28/100

Cysharp/MemoryPack#443 · Opened Apr 20, 2026
Allow for opting out of Unmanaged struct optimizations. Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

Cysharp/MemoryPack#440 · 2 reactions · Opened Apr 7, 2026
Init properties aren't deserialized Open

stale

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Cysharp/MemoryPack#438 · 1 comment · Opened Mar 11, 2026
Required properties causes error Open

stale

Difficulty 3/5 1-2 days Newbie friendliness 66/100

Cysharp/MemoryPack#437 · 1 comment · Opened Mar 11, 2026
Question: why List<int> property causes error: object containing type(s) must be partial? Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

Cysharp/MemoryPack#428 · 3 comments · Opened Nov 22, 2025
Source Generator didn't implement sufficient interfaces under certain circumstances Open

stale

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Cysharp/MemoryPack#421 · 3 comments · Opened Sep 13, 2025
MemoryPack generated unions don't work with nested interfaces Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Cysharp/MemoryPack#394 · 4 comments · Opened Apr 14, 2025
The 'scoped' modifier of parameter 'value' doesn't match overridden or implemented member Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

Cysharp/MemoryPack#378 · 4 comments · 4 reactions · Opened Feb 16, 2025
Generate tree-shakeable Typescript code Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

Cysharp/MemoryPack#355 · 2 comments · Opened Dec 21, 2024
Optional support for opt-in public member serialization? Open

stale

Difficulty 5/5 Over a week Newbie friendliness 38/100

Cysharp/MemoryPack#342 · 8 comments · 3 reactions · Opened Oct 17, 2024

Cysharp/MemoryPack

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