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# Serde
Serde is a framework for ***ser***ializing and ***de***serializing Rust data
structures efficiently and generically.
The Serde ecosystem consists of data structures that know how to serialize
and deserialize themselves along with data formats that know how to
serialize and deserialize other things. Serde provides the layer by which
these two groups interact with each other, allowing any supported data
structure to be serialized and deserialized using any supported data format.
See the Serde website https://serde.rs/ for additional documentation and
usage examples.
### Design
Where many other languages rely on runtime reflection for serializing data,
Serde is instead built on Rust's powerful trait system. A data structure
that knows how to serialize and deserialize itself is one that implements
Serde's `Serialize` and `Deserialize` traits (or uses Serde's code
generation to automatically derive implementations at compile time). This
avoids any overhead of reflection or runtime type information. In fact in
many situations the interaction between data structure and data format can
be completely optimized away by the Rust compiler, leaving Serde
serialization to perform roughly the same speed as a handwritten serializer
for the specific selection of data structure and data format.
### Data formats
The following is a partial list of data formats that have been implemented
for Serde by the community.
- [JSON](https://github.com/serde-rs/json), the ubiquitous JavaScript Object
Notation used by many HTTP APIs.
- [Bincode](https://github.com/TyOverby/bincode), a compact binary format
used for IPC within the Servo rendering engine.
- [CBOR](https://github.com/pyfisch/cbor), a Concise Binary Object
Representation designed for small message size without the need for
version negotiation.
- [YAML](https://github.com/dtolnay/serde-yaml), a popular human-friendly
configuration language that ain't markup language.
- [MessagePack](https://github.com/3Hren/msgpack-rust), an efficient binary
format that resembles a compact JSON.
- [TOML](https://github.com/alexcrichton/toml-rs), a minimal configuration
format used by [Cargo](http://doc.crates.io/manifest.html).
- [Pickle](https://github.com/birkenfeld/serde-pickle), a format common in
the Python world.
- [Hjson](https://github.com/laktak/hjson-rust), a variant of JSON designed
to be readable and writable by humans.
- [BSON](https://github.com/zonyitoo/bson-rs), the data storage and network
transfer format used by MongoDB.
- [URL](https://github.com/nox/serde_urlencoded), the x-www-form-urlencoded
format.
- [XML](https://github.com/serde-rs/xml), the flexible machine-friendly W3C
standard. *(deserialization only)*
- [Envy](https://github.com/softprops/envy), a way to deserialize
environment variables into Rust structs. *(deserialization only)*
- [Redis](https://github.com/OneSignal/serde-redis), deserialize values from
Redis when using [redis-rs](https://crates.io/crates/redis).
*(deserialization only)*