To deserialize JSON responses from the node, the structure of the response is specified in a Rust struct and annotated with the Deserialize macro from the serde library. This macro generates deserialization code for the developer which eases development, but more importantly allows us to deserialize it with the simd-json library. For Solana blocks, this structure is imported from the Solana SDK. For accounts and tokens, custom structures have been defined.
The simd-json library uses CPU vector extensions for accelerated JSON deserialization. Currently, the library supports x86 and ARM vector extensions, but falls back to standard deserialization if used on a system that doesn't support SIMD.
- Since x86's AVX2 is 256-bit, while ARM's NEON is 128-bit, you can expect best performance on x86.
- This library is only used when compiled in the
releaseprofile, because its error messages are less descriptive. For development, it is recommended that you compile in debug mode (the default profile), which will use theserdedeserializer, thus providing more descriptive errors.