diff --git a/docgen/post-process.js b/docgen/post-process.js
index 9c0a79bdcd..011735e11b 100644
--- a/docgen/post-process.js
+++ b/docgen/post-process.js
@@ -20,9 +20,11 @@ const path = require('path');
 const readline = require('readline');
 
 async function main() {
-  await applyExtras();
-  await fixHomePage();
-  await fixTitles();
+  await Promise.all([
+    applyExtras(),
+    fixHomePage(),
+    fixTitles(),
+  ]);
 }
 
 /**
@@ -32,9 +34,7 @@ async function main() {
  */
 async function applyExtras() {
   const extras = await getExtraFiles();
-  for (const source of extras) {
-    await applyExtraContentFrom(source);
-  }
+  await Promise.all(extras.map(applyExtraContentFrom));
 }
 
 /**
@@ -60,9 +60,7 @@ async function fixHomePage() {
 async function fixTitles() {
   const markdownDir = path.join(__dirname, 'markdown');
   const files = await fs.readdir(markdownDir);
-  for (const file of files) {
-    await fixTitleOf(path.join(markdownDir, file));
-  }
+  await Promise.all(files.map((file) => fixTitleOf(path.join(markdownDir, file))));
 
   const tocFile = path.join(markdownDir, 'toc.yaml');
   await fixTocTitles(tocFile);
diff --git a/generate-esm-wrapper.js b/generate-esm-wrapper.js
index 3d47c709d1..cba8527904 100644
--- a/generate-esm-wrapper.js
+++ b/generate-esm-wrapper.js
@@ -35,8 +35,10 @@ async function generateEsmWrapper(entryPoint, source) {
   const target = getTarget(entryPoint);
   const output = getEsmOutput(source, target);
   await fs.mkdir(path.dirname(target), { recursive: true });
-  await fs.writeFile(target, output);
-  await fs.writeFile('./lib/esm/package.json', JSON.stringify({type: 'module'}));
+  await Promise.all([
+    fs.writeFile(target, output),
+    fs.writeFile('./lib/esm/package.json', JSON.stringify({type: 'module'}))
+  ]);
 }
 
 function getTarget(entryPoint) {
diff --git a/generate-reports.js b/generate-reports.js
index 129c06e542..0f520c2210 100644
--- a/generate-reports.js
+++ b/generate-reports.js
@@ -35,10 +35,10 @@ const tempConfigFile = 'api-extractor.tmp';
 
 async function generateReports() {
   const entryPoints = require('./entrypoints.json');
-  for (const entryPoint in entryPoints) {
+  await Promise.all(entryPoints.map((entryPoint) => {
     const filePath = entryPoints[entryPoint].typings;
-    await generateReportForEntryPoint(entryPoint, filePath);
-  }
+    return generateReportForEntryPoint(entryPoint, filePath);
+  }));
 }
 
 async function generateReportForEntryPoint(entryPoint, filePath) {