diff --git a/sites/svelte.dev/src/lib/server/blog/index.js b/sites/svelte.dev/src/lib/server/blog/index.js
index 23bca26233..40bbf4ef48 100644
--- a/sites/svelte.dev/src/lib/server/blog/index.js
+++ b/sites/svelte.dev/src/lib/server/blog/index.js
@@ -1,6 +1,5 @@
 // @ts-check
 import { extractFrontmatter } from '@sveltejs/site-kit/markdown';
-import fs from 'node:fs';
 import { CONTENT_BASE_PATHS } from '../../../constants.js';
 import { render_content } from '../renderer.js';
 
@@ -23,16 +22,18 @@ export async function get_processed_blog_post(blog_data, slug) {
 
 const BLOG_NAME_REGEX = /^(\d{4}-\d{2}-\d{2})-(.+)\.md$/;
 
-/** @returns {import('./types').BlogData} */
-export function get_blog_data(base = CONTENT_BASE_PATHS.BLOG) {
+/** @returns {Promise<import('./types').BlogData>} */
+export async function get_blog_data(base = CONTENT_BASE_PATHS.BLOG) {
+	const { readdir, readFile } = await import('node:fs/promises');
+
 	/** @type {import('./types').BlogData} */
 	const blog_posts = [];
 
-	for (const file of fs.readdirSync(base).reverse()) {
+	for (const file of (await readdir(base)).reverse()) {
 		if (!BLOG_NAME_REGEX.test(file)) continue;
 
 		const { date, date_formatted, slug } = get_date_and_slug(file);
-		const { metadata, body } = extractFrontmatter(fs.readFileSync(`${base}/${file}`, 'utf-8'));
+		const { metadata, body } = extractFrontmatter(await readFile(`${base}/${file}`, 'utf-8'));
 
 		blog_posts.push({
 			date,
diff --git a/sites/svelte.dev/src/lib/server/docs/index.js b/sites/svelte.dev/src/lib/server/docs/index.js
index b88c975c19..eef9e4e2a9 100644
--- a/sites/svelte.dev/src/lib/server/docs/index.js
+++ b/sites/svelte.dev/src/lib/server/docs/index.js
@@ -6,7 +6,6 @@ import {
 	normalizeSlugify,
 	removeMarkdown
 } from '@sveltejs/site-kit/markdown';
-import fs from 'node:fs';
 import { CONTENT_BASE_PATHS } from '../../../constants.js';
 import { render_content } from '../renderer';
 
@@ -29,12 +28,14 @@ export async function get_parsed_docs(docs_data, slug) {
 	return null;
 }
 
-/** @return {import('./types').DocsData} */
-export function get_docs_data(base = CONTENT_BASE_PATHS.DOCS) {
+/** @return {Promise<import('./types').DocsData>} */
+export async function get_docs_data(base = CONTENT_BASE_PATHS.DOCS) {
+	const { readdir, readFile } = await import('node:fs/promises');
+
 	/** @type {import('./types').DocsData} */
 	const docs_data = [];
 
-	for (const category_dir of fs.readdirSync(base)) {
+	for (const category_dir of await readdir(base)) {
 		const match = /\d{2}-(.+)/.exec(category_dir);
 		if (!match) continue;
 
@@ -42,7 +43,7 @@ export function get_docs_data(base = CONTENT_BASE_PATHS.DOCS) {
 
 		// Read the meta.json
 		const { title: category_title, draft = 'false' } = JSON.parse(
-			fs.readFileSync(`${base}/${category_dir}/meta.json`, 'utf-8')
+			await readFile(`${base}/${category_dir}/meta.json`, 'utf-8')
 		);
 
 		if (draft === 'true') continue;
@@ -54,7 +55,7 @@ export function get_docs_data(base = CONTENT_BASE_PATHS.DOCS) {
 			pages: []
 		};
 
-		for (const filename of fs.readdirSync(`${base}/${category_dir}`)) {
+		for (const filename of await readdir(`${base}/${category_dir}`)) {
 			if (filename === 'meta.json') continue;
 			const match = /\d{2}-(.+)/.exec(filename);
 			if (!match) continue;
@@ -62,7 +63,7 @@ export function get_docs_data(base = CONTENT_BASE_PATHS.DOCS) {
 			const page_slug = match[1].replace('.md', '');
 
 			const page_data = extractFrontmatter(
-				fs.readFileSync(`${base}/${category_dir}/${filename}`, 'utf-8')
+				await readFile(`${base}/${category_dir}/${filename}`, 'utf-8')
 			);
 
 			if (page_data.metadata.draft === 'true') continue;
diff --git a/sites/svelte.dev/src/lib/server/tutorial/index.js b/sites/svelte.dev/src/lib/server/tutorial/index.js
index e6e15db443..955a789e65 100644
--- a/sites/svelte.dev/src/lib/server/tutorial/index.js
+++ b/sites/svelte.dev/src/lib/server/tutorial/index.js
@@ -1,5 +1,4 @@
 import { extractFrontmatter } from '@sveltejs/site-kit/markdown';
-import fs from 'node:fs';
 import { CONTENT_BASE_PATHS } from '../../../constants.js';
 import { render_content } from '../renderer.js';
 
@@ -23,24 +22,27 @@ export async function get_parsed_tutorial(tutorial_data, slug) {
 }
 
 /**
- * @returns {import('./types').TutorialData}
+ * @returns {Promise<import('./types').TutorialData>}
  */
-export function get_tutorial_data(base = CONTENT_BASE_PATHS.TUTORIAL) {
+export async function get_tutorial_data(base = CONTENT_BASE_PATHS.TUTORIAL) {
+	const { readdir, readFile, stat } = await import('node:fs/promises');
+
 	const tutorials = [];
 
-	for (const subdir of fs.readdirSync(base)) {
+	for (const subdir of await readdir(base)) {
 		const section = {
 			title: '', // Initialise with empty
 			slug: subdir.split('-').slice(1).join('-'),
 			tutorials: []
 		};
 
-		if (!(fs.statSync(`${base}/${subdir}`).isDirectory() || subdir.endsWith('meta.json'))) continue;
+		if (!((await stat(`${base}/${subdir}`)).isDirectory() || subdir.endsWith('meta.json')))
+			continue;
 
 		if (!subdir.endsWith('meta.json'))
-			section.title = JSON.parse(fs.readFileSync(`${base}/${subdir}/meta.json`, 'utf-8')).title;
+			section.title = JSON.parse(await readFile(`${base}/${subdir}/meta.json`, 'utf-8')).title;
 
-		for (const section_dir of fs.readdirSync(`${base}/${subdir}`)) {
+		for (const section_dir of await readdir(`${base}/${subdir}`)) {
 			const match = /\d{2}-(.+)/.exec(section_dir);
 			if (!match) continue;
 
@@ -49,22 +51,22 @@ export function get_tutorial_data(base = CONTENT_BASE_PATHS.TUTORIAL) {
 			const tutorial_base_dir = `${base}/${subdir}/${section_dir}`;
 
 			// Read the file, get frontmatter
-			const contents = fs.readFileSync(`${tutorial_base_dir}/text.md`, 'utf-8');
+			const contents = await readFile(`${tutorial_base_dir}/text.md`, 'utf-8');
 			const { metadata, body } = extractFrontmatter(contents);
 
 			// Get the contents of the apps.
 			const completion_states_data = { initial: [], complete: [] };
-			for (const app_dir of fs.readdirSync(tutorial_base_dir)) {
+			for (const app_dir of await readdir(tutorial_base_dir)) {
 				if (!app_dir.startsWith('app-')) continue;
 
 				const app_dir_path = `${tutorial_base_dir}/${app_dir}`;
-				const app_contents = fs.readdirSync(app_dir_path, 'utf-8');
+				const app_contents = await readdir(app_dir_path, 'utf-8');
 
 				for (const file of app_contents) {
 					completion_states_data[app_dir === 'app-a' ? 'initial' : 'complete'].push({
 						name: file,
 						type: file.split('.').at(-1),
-						content: fs.readFileSync(`${app_dir_path}/${file}`, 'utf-8')
+						content: await readFile(`${app_dir_path}/${file}`, 'utf-8')
 					});
 				}
 			}
diff --git a/sites/svelte.dev/src/routes/blog/+page.server.js b/sites/svelte.dev/src/routes/blog/+page.server.js
index 7a4bc7eac3..367fc36e70 100644
--- a/sites/svelte.dev/src/routes/blog/+page.server.js
+++ b/sites/svelte.dev/src/routes/blog/+page.server.js
@@ -4,6 +4,6 @@ export const prerender = true;
 
 export async function load() {
 	return {
-		posts: get_blog_list(get_blog_data())
+		posts: get_blog_list(await get_blog_data())
 	};
 }
diff --git a/sites/svelte.dev/src/routes/blog/[slug]/+page.server.js b/sites/svelte.dev/src/routes/blog/[slug]/+page.server.js
index 012fb27ea5..cf5bbfcf70 100644
--- a/sites/svelte.dev/src/routes/blog/[slug]/+page.server.js
+++ b/sites/svelte.dev/src/routes/blog/[slug]/+page.server.js
@@ -4,7 +4,7 @@ import { error } from '@sveltejs/kit';
 export const prerender = true;
 
 export async function load({ params }) {
-	const post = get_processed_blog_post(get_blog_data(), params.slug);
+	const post = get_processed_blog_post(await get_blog_data(), params.slug);
 
 	if (!post) throw error(404);
 
diff --git a/sites/svelte.dev/src/routes/blog/[slug]/card.png/+server.js b/sites/svelte.dev/src/routes/blog/[slug]/card.png/+server.js
index fdd971b100..e8456a6fca 100644
--- a/sites/svelte.dev/src/routes/blog/[slug]/card.png/+server.js
+++ b/sites/svelte.dev/src/routes/blog/[slug]/card.png/+server.js
@@ -11,8 +11,8 @@ const width = 1200;
 
 export const prerender = true;
 
-export const GET = async ({ params }) => {
-	const post = await get_processed_blog_post(get_blog_data(), params.slug);
+export async function GET({ params }) {
+	const post = await get_processed_blog_post(await get_blog_data(), params.slug);
 
 	if (!post) throw error(404);
 
@@ -48,4 +48,4 @@ export const GET = async ({ params }) => {
 			'cache-control': 'public, max-age=600' // cache for 10 minutes
 		}
 	});
-};
+}
diff --git a/sites/svelte.dev/src/routes/blog/rss.xml/+server.js b/sites/svelte.dev/src/routes/blog/rss.xml/+server.js
index 3d279b5286..9cbbdac840 100644
--- a/sites/svelte.dev/src/routes/blog/rss.xml/+server.js
+++ b/sites/svelte.dev/src/routes/blog/rss.xml/+server.js
@@ -58,7 +58,7 @@ const get_rss = (posts) =>
 		.trim();
 
 export async function GET() {
-	const posts = get_blog_list(get_blog_data());
+	const posts = get_blog_list(await get_blog_data());
 
 	return new Response(get_rss(posts), {
 		headers: {
diff --git a/sites/svelte.dev/src/routes/docs/+layout.server.js b/sites/svelte.dev/src/routes/docs/+layout.server.js
index c7bfa54e70..c584e0a8ce 100644
--- a/sites/svelte.dev/src/routes/docs/+layout.server.js
+++ b/sites/svelte.dev/src/routes/docs/+layout.server.js
@@ -10,6 +10,6 @@ export async function load({ url }) {
 	const { get_docs_data, get_docs_list } = await import('$lib/server/docs/index.js');
 
 	return {
-		sections: get_docs_list(get_docs_data())
+		sections: get_docs_list(await get_docs_data())
 	};
 }
diff --git a/sites/svelte.dev/src/routes/docs/[slug]/+page.server.js b/sites/svelte.dev/src/routes/docs/[slug]/+page.server.js
index 5f808a1ca8..2d06cbb987 100644
--- a/sites/svelte.dev/src/routes/docs/[slug]/+page.server.js
+++ b/sites/svelte.dev/src/routes/docs/[slug]/+page.server.js
@@ -4,7 +4,7 @@ import { error } from '@sveltejs/kit';
 export const prerender = true;
 
 export async function load({ params }) {
-	const processed_page = await get_parsed_docs(get_docs_data(), params.slug);
+	const processed_page = await get_parsed_docs(await get_docs_data(), params.slug);
 
 	if (!processed_page) throw error(404);
 
diff --git a/sites/svelte.dev/src/routes/nav.json/+server.js b/sites/svelte.dev/src/routes/nav.json/+server.js
index 7709d26439..c943b09799 100644
--- a/sites/svelte.dev/src/routes/nav.json/+server.js
+++ b/sites/svelte.dev/src/routes/nav.json/+server.js
@@ -14,13 +14,16 @@ export const GET = async () => {
  * @returns {Promise<import('@sveltejs/site-kit').NavigationLink[]>}
  */
 async function get_nav_list() {
-	const docs_list = get_docs_list(get_docs_data());
+	const [docs_list, blog_list] = await Promise.all([
+		get_docs_list(await get_docs_data()),
+		get_blog_list(await get_blog_data())
+	]);
+
 	const processed_docs_list = docs_list.map(({ title, pages }) => ({
 		title,
 		sections: pages.map(({ title, path }) => ({ title, path }))
 	}));
 
-	const blog_list = get_blog_list(get_blog_data());
 	const processed_blog_list = [
 		{
 			title: 'Blog',
diff --git a/sites/svelte.dev/src/routes/tutorial/[slug]/+page.server.js b/sites/svelte.dev/src/routes/tutorial/[slug]/+page.server.js
index 678c11a2ca..59bc318022 100644
--- a/sites/svelte.dev/src/routes/tutorial/[slug]/+page.server.js
+++ b/sites/svelte.dev/src/routes/tutorial/[slug]/+page.server.js
@@ -10,7 +10,7 @@ export const prerender = true;
 export async function load({ params }) {
 	if (params.slug === 'local-transitions') throw redirect(307, '/tutorial/global-transitions');
 
-	const tutorial_data = get_tutorial_data();
+	const tutorial_data = await get_tutorial_data();
 	const tutorials_list = get_tutorial_list(tutorial_data);
 
 	const tutorial = await get_parsed_tutorial(tutorial_data, params.slug);
@@ -25,7 +25,7 @@ export async function load({ params }) {
 }
 
 export async function entries() {
-	const tutorials_list = get_tutorial_list(get_tutorial_data());
+	const tutorials_list = get_tutorial_list(await get_tutorial_data());
 	const slugs = tutorials_list
 		.map(({ tutorials }) => tutorials)
 		.flatMap((val) => val.map(({ slug }) => ({ slug })));
diff --git a/sites/svelte.dev/svelte.config.js b/sites/svelte.dev/svelte.config.js
index c0f386a3b7..a30609723d 100644
--- a/sites/svelte.dev/svelte.config.js
+++ b/sites/svelte.dev/svelte.config.js
@@ -4,7 +4,10 @@ import adapter from '@sveltejs/adapter-vercel';
 /** @type {import('@sveltejs/kit').Config} */
 export default {
 	kit: {
-		adapter: adapter({ runtime: 'edge' })
+		adapter: adapter({ runtime: 'edge' }),
+		prerender: {
+			concurrency: 3
+		}
 	},
 
 	vitePlugin: {