In the following string validation, the error message points to the close quote after "test123". It would be nicer to point to the opening quote instead.

#[macro_use]
extern crate serde_derive;

extern crate serde;
extern crate serde_json;

use std::fmt;
use serde::de::{self, Deserializer, Visitor};

#[derive(Deserialize, Debug)]
struct Esheri3 {
    #[serde(deserialize_with

From our benchmarks we can see that we are consistently slower than everyone else when serializing/deserializing boolean values. We should fix that.

orjson is using an unsafe block to create a reference to a boolean:
https://github.com/ijl/orjson/blob/03d55e99a953ce93cedc05f03e4b63b0bcbbcc7a/src/decode.rs#L81-L96

This avoids additional allocations.
For comparison, this is our code at the

We get the return annotation for free, so we should allow users to do something with it.

Hello, I think this project is not JSON only specific, right? If possible, can we add support to scalapb? Thanks!

We should make Rust enums out of Go code like:

https://github.com/aws/aws-lambda-go/blob/master/events/dynamodb.go#L127