diff --git a/packages/executors/http/src/createFormDataFromVariables.ts b/packages/executors/http/src/createFormDataFromVariables.ts
index aa1a8c13..1b2d07c1 100644
--- a/packages/executors/http/src/createFormDataFromVariables.ts
+++ b/packages/executors/http/src/createFormDataFromVariables.ts
@@ -9,8 +9,8 @@ import {
   FormData as DefaultFormData,
 } from '@whatwg-node/fetch';
 import { extractFiles, isExtractableFile } from 'extract-files';
-import { SerializedRequest } from './index.js';
 import { isGraphQLUpload } from './isGraphQLUpload.js';
+import { jsonStringifyBody, SerializedRequest } from './utils.js';
 
 function collectAsyncIterableValues<T>(
   asyncIterable: AsyncIterable<T>,
@@ -42,11 +42,10 @@ export function createFormDataFromVariables(
   },
 ) {
   if (!body.variables) {
-    return JSON.stringify(body);
+    return jsonStringifyBody(body);
   }
-  const vars = Object.assign({}, body.variables);
   const { clone, files } = extractFiles(
-    vars,
+    body.variables,
     'variables',
     ((v: any) =>
       isExtractableFile(v) ||
@@ -56,7 +55,7 @@ export function createFormDataFromVariables(
       typeof v?.arrayBuffer === 'function') as any,
   );
   if (files.size === 0) {
-    return JSON.stringify(body);
+    return jsonStringifyBody(body);
   }
   const map: Record<number, string[]> = {};
   const uploads: any[] = [];
@@ -69,7 +68,7 @@ export function createFormDataFromVariables(
   const form = new FormDataCtor();
   form.append(
     'operations',
-    JSON.stringify({
+    jsonStringifyBody({
       ...body,
       variables: clone,
     }),
diff --git a/packages/executors/http/src/index.ts b/packages/executors/http/src/index.ts
index a2ee5bec..e3037b33 100644
--- a/packages/executors/http/src/index.ts
+++ b/packages/executors/http/src/index.ts
@@ -25,6 +25,7 @@ import {
   createGraphQLErrorForAbort,
   createResultForAbort,
   hashSHA256,
+  SerializedRequest,
 } from './utils.js';
 
 export type SyncFetchFn = (
@@ -122,13 +123,6 @@ export interface HTTPExecutorOptions {
   disposable?: boolean;
 }
 
-export type SerializedRequest = {
-  query?: string;
-  variables?: Record<string, any>;
-  operationName?: string;
-  extensions?: any;
-};
-
 export type HeadersConfig = Record<string, string>;
 
 // To prevent event listener warnings
@@ -257,7 +251,7 @@ export function buildHTTPExecutor(
           ? request.operationName
           : undefined,
         extensions:
-          request.extensions && Object.keys(request.extensions).length > 0
+          (request.extensions && Object.keys(request.extensions).length > 0)
             ? request.extensions
             : undefined,
       };
diff --git a/packages/executors/http/src/prepareGETUrl.ts b/packages/executors/http/src/prepareGETUrl.ts
index 5559a970..8e71191d 100644
--- a/packages/executors/http/src/prepareGETUrl.ts
+++ b/packages/executors/http/src/prepareGETUrl.ts
@@ -1,4 +1,4 @@
-import { SerializedRequest } from '.';
+import { SerializedRequest } from './utils.js';
 
 export function prepareGETUrl({
   baseUrl = '',
diff --git a/packages/executors/http/src/utils.ts b/packages/executors/http/src/utils.ts
index ea300303..d9c78dea 100644
--- a/packages/executors/http/src/utils.ts
+++ b/packages/executors/http/src/utils.ts
@@ -37,3 +37,42 @@ export function hashSHA256(str: string) {
     },
   );
 }
+
+export type SerializedRequest = {
+  query?: string;
+  variables?: Record<string, any>;
+  operationName?: string;
+  extensions?: any;
+};
+
+// For faster serialization instead of JSON.stringify overhead
+export function jsonStringifyBody(body: SerializedRequest) {
+  let str = '{';
+  let prev = false;
+  if (body.query) {
+    str += `"query":"${body.query.replaceAll('"', '\\"')}"`;
+    prev = true;
+  }
+  if (body.variables) {
+    if (prev) {
+      str += ',';
+    }
+    str += `"variables":${JSON.stringify(body.variables)}`;
+    prev = true;
+  }
+  if (body.operationName) {
+    if (prev) {
+      str += ',';
+    }
+    str += `"operationName":"${body.operationName}"`;
+    prev = true;
+  }
+  if (body.extensions) {
+    if (prev) {
+      str += ',';
+    }
+    str += `"extensions":${JSON.stringify(body.extensions)}`;
+  }
+  str += '}';
+  return str;
+}
\ No newline at end of file