Lambda HTTP Request Deserialization by Serde Json and SIMD JSON

Cargo.toml

[package]
name = "test-serde-simd-json"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
bytes = "1.5"
simd-json = "0.13"
lambda_http = { version = "0.9", default-features = false, features = ["apigw_rest"] }
serde_json = "1.0"

main.rs

use lambda_http::request::LambdaRequest;
use lambda_http::Request;

static EVENT: &str = r#"{
	"resource": "/{proxy+}",
	"path": "/hello/world",
	"httpMethod": "POST",
	"headers": {
		"Accept": "*/*",
		"Accept-Encoding": "gzip, deflate",
		"cache-control": "no-cache",
		"CloudFront-Forwarded-Proto": "https",
		"CloudFront-Is-Desktop-Viewer": "true",
		"CloudFront-Is-Mobile-Viewer": "false",
		"CloudFront-Is-SmartTV-Viewer": "false",
		"CloudFront-Is-Tablet-Viewer": "false",
		"CloudFront-Viewer-Country": "US",
		"Content-Type": "application/json",
		"headerName": "headerValue",
		"Host": "gy415nuibc.execute-api.us-east-1.amazonaws.com",
		"Postman-Token": "9f583ef0-ed83-4a38-aef3-eb9ce3f7a57f",
		"User-Agent": "PostmanRuntime/2.4.5",
		"Via": "1.1 d98420743a69852491bbdea73f7680bd.cloudfront.net (CloudFront)",
		"X-Amz-Cf-Id": "pn-PWIJc6thYnZm5P0NMgOUglL1DYtl0gdeJky8tqsg8iS_sgsKD1A==",
		"X-Forwarded-For": "54.240.196.186, 54.182.214.83",
		"X-Forwarded-Port": "443",
		"X-Forwarded-Proto": "https"
	},
	"multiValueHeaders": {
		"Accept": [
			"*/*"
		],
		"Accept-Encoding": [
			"gzip, deflate"
		],
		"cache-control": [
			"no-cache"
		],
		"CloudFront-Forwarded-Proto": [
			"https"
		],
		"CloudFront-Is-Desktop-Viewer": [
			"true"
		],
		"CloudFront-Is-Mobile-Viewer": [
			"false"
		],
		"CloudFront-Is-SmartTV-Viewer": [
			"false"
		],
		"CloudFront-Is-Tablet-Viewer": [
			"false"
		],
		"CloudFront-Viewer-Country": [
			"US"
		],
		"Content-Type": [
			"application/json"
		],
		"headerName": [
			"headerValue"
		],
		"Host": [
			"gy415nuibc.execute-api.us-east-1.amazonaws.com"
		],
		"Postman-Token": [
			"9f583ef0-ed83-4a38-aef3-eb9ce3f7a57f"
		],
		"User-Agent": [
			"PostmanRuntime/2.4.5"
		],
		"Via": [
			"1.1 d98420743a69852491bbdea73f7680bd.cloudfront.net (CloudFront)"
		],
		"X-Amz-Cf-Id": [
			"pn-PWIJc6thYnZm5P0NMgOUglL1DYtl0gdeJky8tqsg8iS_sgsKD1A=="
		],
		"X-Forwarded-For": [
			"54.240.196.186, 54.182.214.83"
		],
		"X-Forwarded-Port": [
			"443"
		],
		"X-Forwarded-Proto": [
			"https"
		]
	},
	"queryStringParameters": {
		"name": "me"
	},
	"multiValueQueryStringParameters": {
		"name": [
			"me"
		]
	},
	"pathParameters": {
		"proxy": "hello/world"
	},
	"stageVariables": {
		"stageVariableName": "stageVariableValue"
	},
	"requestContext": {
		"accountId": "12345678912",
		"resourceId": "roq9wj",
		"path": "/hello/world",
		"stage": "testStage",
		"domainName": "gy415nuibc.execute-api.us-east-2.amazonaws.com",
		"domainPrefix": "y0ne18dixk",
		"requestId": "deef4878-7910-11e6-8f14-25afc3e9ae33",
		"protocol": "HTTP/1.1",
		"identity": {
			"cognitoIdentityPoolId": "theCognitoIdentityPoolId",
			"accountId": "theAccountId",
			"cognitoIdentityId": "theCognitoIdentityId",
			"caller": "theCaller",
			"apiKey": "theApiKey",
			"apiKeyId": "theApiKeyId",
			"accessKey": "ANEXAMPLEOFACCESSKEY",
			"sourceIp": "192.168.196.186",
			"cognitoAuthenticationType": "theCognitoAuthenticationType",
			"cognitoAuthenticationProvider": "theCognitoAuthenticationProvider",
			"userArn": "theUserArn",
			"userAgent": "PostmanRuntime/2.4.5",
			"user": "theUser"
		},
		"authorizer": {
			"principalId": "admin",
			"clientId": 1,
			"clientName": "Exata"
		},
		"resourcePath": "/{proxy+}",
		"httpMethod": "POST",
		"requestTime": "15/May/2020:06:01:09 +0000",
		"requestTimeEpoch": 1589522469693,
		"apiId": "gy415nuibc"
	},
	"body": "{\r\n\t\"a\": 1\r\n}"
}
"#;


pub fn main() {

	let payload1 = EVENT.to_string();
	let by_serde: Result<Request, serde_json::Error> = serde_json::from_reader(payload1.as_bytes()).map(LambdaRequest::into);
	let payload2 = EVENT.to_string();
	let by_simd: Result<Request, simd_json::Error> = simd_json::from_reader(payload2.as_bytes()).map(LambdaRequest::into);

	println!("BY SERDE: {:#?}", by_serde);
	println!("BY SIMD: {:#?}", by_simd);
}