fix: small perf improvement

Signed-off-by: will Farrell <willfarrell@proton.me>

packages/core/index.d.ts

@@ -31,7 +31,7 @@ interface PluginObject {
 }
 
 export interface Request<
-	TEvent = any,
+	TEvent = unknown,
 	TResult = any,
 	TErr = Error,
 	TContext extends LambdaContext | LambdaContextDurable = LambdaContext,
@@ -46,7 +46,7 @@ export interface Request<
 }
 
 declare type MiddlewareFn<
-	TEvent = any,
+	TEvent = unknown,
 	TResult = any,
 	TErr = Error,
 	TContext extends LambdaContext | LambdaContextDurable = LambdaContext,
@@ -91,7 +91,7 @@ type MiddyInputPromiseHandler<
 > = (event: TEvent, context: TContext) => Promise<TResult>;
 
 export interface MiddyfiedHandler<
-	TEvent = any,
+	TEvent = unknown,
 	TResult = any,
 	TErr = Error,
 	TContext extends LambdaContext | LambdaContextDurable = LambdaContext,
@@ -122,7 +122,7 @@ export interface MiddyfiedHandler<
 }
 
 declare type AttachMiddlewareFn<
-	TEvent = any,
+	TEvent = unknown,
 	TResult = any,
 	TErr = Error,
 	TContext extends LambdaContext | LambdaContextDurable = LambdaContext,
@@ -132,7 +132,7 @@ declare type AttachMiddlewareFn<
 ) => MiddyfiedHandler<TEvent, TResult, TErr, TContext, TInternal>;
 
 declare type AttachMiddlewareObj<
-	TEvent = any,
+	TEvent = unknown,
 	TResult = any,
 	TErr = Error,
 	TContext extends LambdaContext | LambdaContextDurable = LambdaContext,
@@ -142,7 +142,7 @@ declare type AttachMiddlewareObj<
 ) => MiddyfiedHandler<TEvent, TResult, TErr, TContext, TInternal>;
 
 declare type UseFn<
-	TEvent = any,
+	TEvent = unknown,
 	TResult = any,
 	TErr = Error,
 	TContext extends LambdaContext | LambdaContextDurable = LambdaContext,
@@ -187,7 +187,7 @@ declare type MiddlewareHandler<
 	THandler extends LambdaHandler<any, any>,
 	TContext extends LambdaContext | LambdaContextDurable = LambdaContext,
 	TResult = any,
-	TEvent = any,
+	TEvent = unknown,
 > =
 	THandler extends LambdaHandler<TEvent, TResult> // always true
 		? MiddyInputHandler<TEvent, TResult, TContext>

packages/do-not-wait-for-empty-event-loop/index.js

@@ -11,7 +11,7 @@ const defaults = {
 const doNotWaitForEmptyEventLoopMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
 
-	const doNotWaitForEmptyEventLoop = async (request) => {
+	const doNotWaitForEmptyEventLoop = (request) => {
 		if (isExecutionModeDurable(request.context)) {
 			request.context.lambdaContext.callbackWaitsForEmptyEventLoop = false;
 		} else {

packages/error-logger/index.js

@@ -8,7 +8,7 @@ const errorLoggerMiddleware = (opts = {}) => {
 	let { logger } = { ...defaults, ...opts };
 	if (typeof logger !== "function") logger = null;
 
-	const errorLoggerMiddlewareOnError = async (request) => {
+	const errorLoggerMiddlewareOnError = (request) => {
 		logger(request);
 	};
 	return {

packages/event-normalizer/index.js

@@ -8,7 +8,7 @@ const defaults = {
 
 const eventNormalizerMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
-	const eventNormalizerMiddlewareBefore = async (request) => {
+	const eventNormalizerMiddlewareBefore = (request) => {
 		parseEvent(request.event, options);
 	};
 	return {

packages/http-content-negotiation/index.js

@@ -28,7 +28,7 @@ const defaults = {
 const httpContentNegotiationMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
 
-	const httpContentNegotiationMiddlewareBefore = async (request) => {
+	const httpContentNegotiationMiddlewareBefore = (request) => {
 		const { event, context } = request;
 		if (!event.headers) return;
 		if (options.parseCharsets) {

packages/http-cors/index.js

@@ -190,7 +190,7 @@ const httpCorsMiddleware = (opts = {}) => {
 		}
 	};
 
-	const httpCorsMiddlewareBefore = async (request) => {
+	const httpCorsMiddlewareBefore = (request) => {
 		if (options.disableBeforePreflightResponse) return;
 
 		const method = getVersionHttpMethod[request.event.version ?? "1.0"]?.(
@@ -240,9 +240,9 @@ const httpCorsMiddleware = (opts = {}) => {
 		}
 	};
 
-	const httpCorsMiddlewareAfter = async (request) => {
+	const httpCorsMiddlewareAfter = (request) => {
 		normalizeHttpResponse(request);
-		const headers = structuredClone(request.response.headers);
+		const headers = { ...request.response.headers };
 		modifyHeaders(headers, options, request);
 		request.response.headers = headers;
 	};

packages/http-error-handler/index.js

@@ -10,7 +10,7 @@ const defaults = {
 const httpErrorHandlerMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
 
-	const httpErrorHandlerMiddlewareOnError = async (request) => {
+	const httpErrorHandlerMiddlewareOnError = (request) => {
 		if (typeof request.response !== "undefined") return;
 		if (typeof options.logger === "function") {
 			options.logger(request.error);

packages/http-event-normalizer/index.js

@@ -1,7 +1,7 @@
 // Copyright 2017 - 2026 will Farrell, Luciano Mammino, and Middy contributors.
 // SPDX-License-Identifier: MIT
 const httpEventNormalizerMiddleware = () => {
-	const httpEventNormalizerMiddlewareBefore = async (request) => {
+	const httpEventNormalizerMiddlewareBefore = (request) => {
 		const { event } = request;
 
 		const version = pickVersion(event);

packages/http-header-normalizer/index.js

@@ -75,7 +75,7 @@ const httpHeaderNormalizerMiddleware = (opts = {}) => {
 			: options.defaultHeaders[key].split(",");
 	}
 
-	const httpHeaderNormalizerMiddlewareBefore = async (request) => {
+	const httpHeaderNormalizerMiddlewareBefore = (request) => {
 		if (request.event.headers) {
 			const headers = { ...defaultHeaders };
 

packages/http-json-body-parser/index.js

@@ -12,7 +12,7 @@ const defaults = {
 
 const httpJsonBodyParserMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
-	const httpJsonBodyParserMiddlewareBefore = async (request) => {
+	const httpJsonBodyParserMiddlewareBefore = (request) => {
 		const { headers, body } = request.event;
 		const contentType = headers?.["content-type"] ?? headers?.["Content-Type"];
 

packages/http-multipart-body-parser/index.js

@@ -4,7 +4,7 @@ import BusBoy from "@fastify/busboy";
 import { createError } from "@middy/util";
 
 const mimePattern =
-	/^multipart\/form-data; boundary=[a-zA-Z0-9-]{1,70}(; ?[cC]harset=[\w-]+)?$/;
+	/^multipart\/form-data; boundary=[a-zA-Z0-9-]{1,70}(; ?charset=[\w-]+)?$/i;
 const fieldnamePattern = /(.+)\[(.*)]$/;
 
 const defaults = {
@@ -18,7 +18,7 @@ const defaults = {
 const httpMultipartBodyParserMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
 
-	const httpMultipartBodyParserMiddlewareBefore = async (request) => {
+	const httpMultipartBodyParserMiddlewareBefore = (request) => {
 		const { headers, body } = request.event;
 
 		const contentType = headers?.["content-type"] ?? headers?.["Content-Type"];

packages/http-partial-response/index.js

@@ -11,7 +11,7 @@ const httpPartialResponseMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
 	const { filteringKeyName } = options;
 
-	const httpPartialResponseMiddlewareAfter = async (request) => {
+	const httpPartialResponseMiddlewareAfter = (request) => {
 		const fields = request.event?.queryStringParameters?.[filteringKeyName];
 		if (!fields) return;
 

packages/http-response-serializer/index.js

@@ -9,7 +9,7 @@ const defaults = {
 
 const httpResponseSerializerMiddleware = (opts = {}) => {
 	const { serializers, defaultContentType } = { ...defaults, ...opts };
-	const httpResponseSerializerMiddlewareAfter = async (request) => {
+	const httpResponseSerializerMiddlewareAfter = (request) => {
 		normalizeHttpResponse(request);
 
 		// skip serialization when Content-Type or content-type is already set

packages/http-security-headers/index.js

@@ -260,7 +260,7 @@ helmet.xssProtection = (headers, config) => {
 const httpSecurityHeadersMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
 
-	const httpSecurityHeadersMiddlewareAfter = async (request) => {
+	const httpSecurityHeadersMiddlewareAfter = (request) => {
 		normalizeHttpResponse(request);
 
 		for (const key of Object.keys(helmet)) {

packages/http-urlencode-body-parser/index.js

@@ -2,15 +2,15 @@
 // SPDX-License-Identifier: MIT
 import { createError, decodeBody } from "@middy/util";
 
-const mimePattern = /^application\/x-www-form-urlencoded(;.*)?$/;
+const mimePattern = /^application\/x-www-form-urlencoded(;.*)?$/i;
 const defaults = {
 	disableContentTypeCheck: false,
 	disableContentTypeError: false,
 };
 const httpUrlencodeBodyParserMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
 
-	const httpUrlencodeBodyParserMiddlewareBefore = async (request) => {
+	const httpUrlencodeBodyParserMiddlewareBefore = (request) => {
 		const { headers, body } = request.event;
 
 		const contentType = headers?.["content-type"] ?? headers?.["Content-Type"];

packages/http-urlencode-path-parser/index.js

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: MIT
 import { createError } from "@middy/util";
 
-const httpUrlencodePathParserMiddlewareBefore = async (request) => {
+const httpUrlencodePathParserMiddlewareBefore = (request) => {
 	if (!request.event.pathParameters) return;
 	for (const key of Object.keys(request.event.pathParameters)) {
 		try {

packages/input-output-logger/index.js

@@ -90,10 +90,10 @@ const inputOutputLoggerMiddleware = (opts = {}) => {
 		}
 	};
 
-	const inputOutputLoggerMiddlewareBefore = async (request) => {
+	const inputOutputLoggerMiddlewareBefore = (request) => {
 		omitAndLog("event", request);
 	};
-	const inputOutputLoggerMiddlewareAfter = async (request) => {
+	const inputOutputLoggerMiddlewareAfter = (request) => {
 		// Check for Node.js stream
 		if (
 			request.response?._readableState ??

packages/sqs-partial-batch-failure/index.js

@@ -7,7 +7,7 @@ const defaults = {
 const sqsPartialBatchFailureMiddleware = (opts = {}) => {
 	const { logger } = { ...defaults, ...opts };
 
-	const sqsPartialBatchFailureMiddlewareAfter = async (request) => {
+	const sqsPartialBatchFailureMiddlewareAfter = (request) => {
 		const {
 			event: { Records },
 			response,

packages/ws-json-body-parser/index.js

@@ -8,7 +8,7 @@ const defaults = {
 
 const wsJsonBodyParserMiddleware = (opts = {}) => {
 	const options = { ...defaults, ...opts };
-	const wsJsonBodyParserMiddlewareBefore = async (request) => {
+	const wsJsonBodyParserMiddlewareBefore = (request) => {
 		const { body } = request.event;
 		if (typeof body === "undefined") {
 			throw createError(422, "Invalid or malformed JSON was provided", {