This allows us to switch back to serde_json::from_slice instead of serde_json::from_reader, because the latter is significantly slower. See https://github.com/serde-rs/json/issues/160
This allows us to switch back to serde_json::from_slice instead of serde_json::from_reader, because the latter is significantly slower. See https://github.com/serde-rs/json/issues/160