Use Promise.all whenever possible

packages/gitbook/src/components/Ads/AdClassicRendering.tsx

@@ -19,14 +19,14 @@ export async function AdClassicRendering({
     insightsAd: SiteInsightsAd | null;
     context: GitBookBaseContext;
 }) {
-    const smallImgSrc =
+    const [smallImgSrc, logoSrc] = await Promise.all([
         'smallImage' in ad
-            ? await getResizedImageURL(context.imageResizer, ad.smallImage, { width: 192, dpr: 2 })
-            : null;
-    const logoSrc =
+            ? getResizedImageURL(context.imageResizer, ad.smallImage, { width: 192, dpr: 2 })
+            : null,
         'logo' in ad
-            ? await getResizedImageURL(context.imageResizer, ad.logo, { width: 192 - 48, dpr: 2 })
-            : null;
+            ? getResizedImageURL(context.imageResizer, ad.logo, { width: 192 - 48, dpr: 2 })
+            : null,
+    ]);
     return (
         <Link
             rel="sponsored noopener"

packages/gitbook/src/components/Ads/renderAd.tsx

@@ -43,10 +43,12 @@ interface FetchPlaceholderAdOptions {
  * and properly access user-agent and IP.
  */
 export async function renderAd(options: FetchAdOptions) {
-    const context = isV2() ? await getServerActionBaseContext() : await getV1BaseContext();
+    const [context, result] = await Promise.all([
+        isV2() ? getServerActionBaseContext() : getV1BaseContext(),
+        options.source === 'live' ? fetchAd(options) : getPlaceholderAd(),
+    ]);
 
     const mode = options.source === 'live' ? options.mode : 'classic';
-    const result = options.source === 'live' ? await fetchAd(options) : await getPlaceholderAd();
     if (!result || !result.ad.description || !result.ad.statlink) {
         return null;
     }

packages/gitbook/src/components/DocumentView/Table/RecordCard.tsx

@@ -23,18 +23,18 @@ export async function RecordCard(
     const coverFile = view.coverDefinition
         ? getRecordValue<string[]>(record[1], view.coverDefinition)?.[0]
         : null;
-    const cover =
-        coverFile && context.contentContext
-            ? await resolveContentRef({ kind: 'file', file: coverFile }, context.contentContext)
-            : null;
-
     const targetRef = view.targetDefinition
         ? (record[1].values[view.targetDefinition] as ContentRef)
         : null;
-    const target =
+
+    const [cover, target] = await Promise.all([
+        coverFile && context.contentContext
+            ? resolveContentRef({ kind: 'file', file: coverFile }, context.contentContext)
+            : null,
         targetRef && context.contentContext
-            ? await resolveContentRef(targetRef, context.contentContext)
-            : null;
+            ? resolveContentRef(targetRef, context.contentContext)
+            : null,
+    ]);
 
     const coverIsSquareOrPortrait =
         cover?.file?.dimensions &&

packages/gitbook/src/components/PageBody/PageCover.tsx

@@ -21,8 +21,10 @@ export async function PageCover(props: {
     context: GitBookSiteContext;
 }) {
     const { as, page, cover, context } = props;
-    const resolved = cover.ref ? await resolveContentRef(cover.ref, context) : null;
-    const resolvedDark = cover.refDark ? await resolveContentRef(cover.refDark, context) : null;
+    const [resolved, resolvedDark] = await Promise.all([
+        cover.ref ? resolveContentRef(cover.ref, context) : null,
+        cover.refDark ? resolveContentRef(cover.refDark, context) : null,
+    ]);
 
     return (
         <div

packages/gitbook/src/components/SiteLayout/SiteLayout.tsx

@@ -102,7 +102,7 @@ export async function generateSiteLayoutMetadata(context: GitBookSiteContext): P
     const customIcon = 'icon' in customization.favicon ? customization.favicon.icon : null;
 
     const faviconSize = 48;
-    const icons = [
+    const icons = await Promise.all([
         {
             url: customIcon?.light
                 ? await getResizedImageURL(imageResizer, customIcon.light, {
@@ -125,7 +125,7 @@ export async function generateSiteLayoutMetadata(context: GitBookSiteContext): P
             type: 'image/png',
             media: '(prefers-color-scheme: dark)',
         },
-    ];
+    ]);
 
     return {
         title: site.title,

packages/gitbook/src/routes/ogimage.tsx

@@ -45,7 +45,7 @@ export async function serveOGImage(baseContext: GitBookSiteContext, params: Page
             : '';
 
     // Load the fonts
-    const { fontFamily, fonts } = await (async () => {
+    const fontLoader = async () => {
         // google fonts
         if (typeof customization.styling.font === 'string') {
             const fontFamily = customization.styling.font ?? CustomizationDefaultFont.Inter;
@@ -85,7 +85,7 @@ export async function serveOGImage(baseContext: GitBookSiteContext, params: Page
         ).filter(filterOutNullable);
 
         return { fontFamily: 'CustomFont', fonts };
-    })();
+    };
 
     const theme = customization.themes.default;
     const useLightTheme = theme === 'light';
@@ -139,7 +139,7 @@ export async function serveOGImage(baseContext: GitBookSiteContext, params: Page
             break;
     }
 
-    const favicon = await (async () => {
+    const faviconLoader = async () => {
         if ('icon' in customization.favicon)
             return (
                 <img
@@ -164,7 +164,9 @@ export async function serveOGImage(baseContext: GitBookSiteContext, params: Page
             )
         );
         return <img src={src} alt="Icon" width={40} height={40} tw="mr-4" />;
-    })();
+    };
+
+    const [favicon, { fontFamily, fonts }] = await Promise.all([faviconLoader(), fontLoader()]);
 
     return new ImageResponse(
         <div