From 03ba9e391b3b4ae7f251d4b681418d0a0c0ddea2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Fri, 4 Jun 2021 14:59:22 -0400
Subject: [PATCH 1/7] chore: add glob and jest-worker

---
 package.json |  2 ++
 yarn.lock    | 18 ++++++++++--------
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/package.json b/package.json
index 25f4f09640e3..21d69a87d176 100644
--- a/package.json
+++ b/package.json
@@ -51,6 +51,7 @@
     "eslint-plugin-prettier": "^3.4.0",
     "fancy-log": "^1.3.3",
     "flow-bin": "^0.123.0",
+    "glob": "^7.1.7",
     "gulp": "^4.0.2",
     "gulp-babel": "^8.0.0",
     "gulp-filter": "^5.1.0",
@@ -59,6 +60,7 @@
     "gulp-revert-path": "^2.0.0",
     "husky": "^3.0.0",
     "jest": "^27.0.0",
+    "jest-worker": "^27.0.2",
     "lint-staged": "^9.2.0",
     "lodash": "^4.17.21",
     "mergeiterator": "^1.2.5",
diff --git a/yarn.lock b/yarn.lock
index 28b0fabd1038..74f808a9dc72 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5763,6 +5763,7 @@ __metadata:
     eslint-plugin-prettier: ^3.4.0
     fancy-log: ^1.3.3
     flow-bin: ^0.123.0
+    glob: ^7.1.7
     gulp: ^4.0.2
     gulp-babel: ^8.0.0
     gulp-filter: ^5.1.0
@@ -5771,6 +5772,7 @@ __metadata:
     gulp-revert-path: ^2.0.0
     husky: ^3.0.0
     jest: ^27.0.0
+    jest-worker: ^27.0.2
     lint-staged: ^9.2.0
     lodash: ^4.17.21
     mergeiterator: ^1.2.5
@@ -8835,9 +8837,9 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"glob@npm:^7.0.0, glob@npm:^7.0.3, glob@npm:^7.1.0, glob@npm:^7.1.1, glob@npm:^7.1.2, glob@npm:^7.1.3, glob@npm:^7.1.4, glob@npm:^7.1.6":
-  version: 7.1.6
-  resolution: "glob@npm:7.1.6"
+"glob@npm:^7.0.0, glob@npm:^7.0.3, glob@npm:^7.1.0, glob@npm:^7.1.1, glob@npm:^7.1.2, glob@npm:^7.1.3, glob@npm:^7.1.4, glob@npm:^7.1.6, glob@npm:^7.1.7":
+  version: 7.1.7
+  resolution: "glob@npm:7.1.7"
   dependencies:
     fs.realpath: ^1.0.0
     inflight: ^1.0.4
@@ -8845,7 +8847,7 @@ fsevents@^1.2.7:
     minimatch: ^3.0.4
     once: ^1.3.0
     path-is-absolute: ^1.0.0
-  checksum: 789977b52432865bd63846da5c75a6efc2c56abdc0cb5ffcdb8e91eeb67a58fa5594c1195d18b2b4aff99675b0739ed6bd61024b26562e0cca18c8f993efdc82
+  checksum: 352f74f08247db5420161a2f68f2bd84b53228b5fcfc9dcc37cd54d3f19ec0232495d84aeff1286d0727059e9fdc1031400e00b971bdc59e30f8f82b199c9d02
   languageName: node
   linkType: hard
 
@@ -10530,14 +10532,14 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"jest-worker@npm:^27.0.1":
-  version: 27.0.1
-  resolution: "jest-worker@npm:27.0.1"
+"jest-worker@npm:^27.0.1, jest-worker@npm:^27.0.2":
+  version: 27.0.2
+  resolution: "jest-worker@npm:27.0.2"
   dependencies:
     "@types/node": "*"
     merge-stream: ^2.0.0
     supports-color: ^8.0.0
-  checksum: c99fcfd6bf2ef0c9fef30e08fb00d7fe951be84d2cff37a3d8983d683857b150a7ac60829ed30893c69277a1d74b57fc2b8aae83ded208fd574985fd9b04162f
+  checksum: bfbfd3d0af94a5505e841719bba4f57823305a3333b3dcecad333eea517c18ee3ba528e8fab017444ad93666ca15b73f1969b71fe0ba9f9abec8843a74b081e7
   languageName: node
   linkType: hard
 

From 9adecfb5c8a42f11fad0e3f4d48fef3210ec846f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Fri, 4 Jun 2021 14:59:40 -0400
Subject: [PATCH 2/7] add buildBabel2 routine

---
 Gulpfile.mjs     | 50 +++++++++++++++++++++++++++++++++++++++++++++---
 babel-worker.cjs | 39 +++++++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+), 3 deletions(-)
 create mode 100644 babel-worker.cjs

diff --git a/Gulpfile.mjs b/Gulpfile.mjs
index 2abf94c7f87d..e72d1e1b5033 100644
--- a/Gulpfile.mjs
+++ b/Gulpfile.mjs
@@ -21,6 +21,8 @@ import rollupReplace from "@rollup/plugin-replace";
 import { terser as rollupTerser } from "rollup-plugin-terser";
 import _rollupDts from "rollup-plugin-dts";
 const { default: rollupDts } = _rollupDts;
+import { Worker as JestWorker } from "jest-worker";
+import glob from "glob";
 
 import rollupBabelSource from "./scripts/rollup-plugin-babel-source.js";
 import formatCode from "./scripts/utils/formatCode.js";
@@ -251,6 +253,44 @@ function buildBabel(exclude) {
     .pipe(gulp.dest(base));
 }
 
+function createWorker() {
+  const worker = new JestWorker(require.resolve("./babel-worker.cjs"), {
+    numWorkers: require("os").cpus().length / 2 - 1,
+    exposedMethods: ["transform"],
+  });
+  worker.getStdout().on("data", chunk => process.stdout.write(chunk));
+  worker.getStderr().on("data", chunk => process.stderr.write(chunk));
+  return worker;
+}
+
+async function buildBabel2(ignore = [], useWorker) {
+  const worker = useWorker ? createWorker() : require("./babel-worker.js");
+  const files = await new Promise((resolve, reject) => {
+    glob(
+      defaultSourcesGlob,
+      {
+        ignore: ignore.map(p => `./${p.src}/**`),
+      },
+      (err, files) => {
+        if (err) reject(err);
+        resolve(files);
+      }
+    );
+  });
+
+  const promises = [];
+  for (const file of files) {
+    // @example ./packages/babel-parser/src/index.js
+    const dest = "./" + mapSrcToLib(file.slice(2));
+    promises.push(worker.transform(file, dest));
+  }
+  return Promise.all(promises).finally(() => {
+    if (useWorker) {
+      worker.end();
+    }
+  });
+}
+
 /**
  * Resolve a nested dependency starting from the given file
  */
@@ -517,7 +557,7 @@ gulp.task(
   gulp.series("copy-dts", () => buildRollupDts(dtsBundles))
 );
 
-gulp.task("build-babel", () => buildBabel(/* exclude */ libBundles));
+gulp.task("build-babel", () => buildBabel2(/* exclude */ libBundles, true));
 
 gulp.task(
   "build",
@@ -536,7 +576,11 @@ gulp.task(
 
 gulp.task("default", gulp.series("build"));
 
-gulp.task("build-no-bundle", () => buildBabel());
+gulp.task("build-no-bundle1", () => buildBabel(undefined, true));
+// First complete build on workers for complilation speed
+gulp.task("build-no-bundle", () => buildBabel2(undefined, true));
+// Incremental builds is main thread for faster communication
+gulp.task("build-no-bundle-watch", () => buildBabel2(undefined, false));
 
 gulp.task(
   "build-dev",
@@ -556,7 +600,7 @@ gulp.task(
 gulp.task(
   "watch",
   gulp.series("build-dev", function watch() {
-    gulp.watch(defaultSourcesGlob, gulp.task("build-no-bundle"));
+    gulp.watch(defaultSourcesGlob, gulp.task("build-no-bundle-watch"));
     gulp.watch(
       babelStandalonePluginConfigGlob,
       gulp.task("generate-standalone")
diff --git a/babel-worker.cjs b/babel-worker.cjs
new file mode 100644
index 000000000000..abd77a8818ab
--- /dev/null
+++ b/babel-worker.cjs
@@ -0,0 +1,39 @@
+const { transformSync } = require("@babel/core");
+const { mkdirSync, statSync, readFileSync, writeFileSync } = require("fs");
+const { dirname } = require("path");
+const chalk = require("chalk");
+const fancyLog = require("fancy-log");
+
+function needCompile(src, dest) {
+  let destStat;
+  const srcStat = statSync(src);
+  try {
+    destStat = statSync(dest);
+  } catch (err) {
+    if (err.code === "ENOENT") {
+      return true;
+    } else {
+      throw err;
+    }
+  }
+  return srcStat.mtimeMs > destStat.mtimeMs;
+}
+
+exports.transform = function (src, dest) {
+  mkdirSync(dirname(dest), { recursive: true });
+  if (!needCompile(src, dest)) {
+    return;
+  }
+  fancyLog(`Compiling '${chalk.cyan(src)}'...`);
+  const content = readFileSync(src, { encoding: "utf8" });
+  const { code } = transformSync(content, {
+    filename: src,
+    caller: {
+      // We have wrapped packages/babel-core/src/config/files/configuration.js with feature detection
+      supportsDynamicImport: true,
+      name: "babel-worker",
+    },
+  });
+
+  writeFileSync(dest, code, "utf8");
+};

From 925303d9b5fc6d0383addb65dd39dca5646e701c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Fri, 4 Jun 2021 15:16:24 -0400
Subject: [PATCH 3/7] cleanup

---
 Gulpfile.mjs | 62 ++++++++++------------------------------------
 package.json |  3 ---
 yarn.lock    | 69 ++--------------------------------------------------
 3 files changed, 15 insertions(+), 119 deletions(-)

diff --git a/Gulpfile.mjs b/Gulpfile.mjs
index e72d1e1b5033..7a5a7e8d5957 100644
--- a/Gulpfile.mjs
+++ b/Gulpfile.mjs
@@ -5,11 +5,8 @@ import { fileURLToPath } from "url";
 import plumber from "gulp-plumber";
 import through from "through2";
 import chalk from "chalk";
-import newer from "gulp-newer";
-import babel from "gulp-babel";
 import fancyLog from "fancy-log";
 import filter from "gulp-filter";
-import revertPath from "gulp-revert-path";
 import gulp from "gulp";
 import { rollup } from "rollup";
 import { babel as rollupBabel } from "@rollup/plugin-babel";
@@ -77,13 +74,6 @@ function getIndexFromPackage(name) {
   }
 }
 
-function compilationLogger() {
-  return through.obj(function (file, enc, callback) {
-    fancyLog(`Compiling '${chalk.cyan(file.relative)}'...`);
-    callback(null, file);
-  });
-}
-
 function errorsLogger() {
   return plumber({
     errorHandler(err) {
@@ -224,38 +214,13 @@ function getFiles(glob, { include, exclude }) {
   return stream;
 }
 
-function buildBabel(exclude) {
-  const base = monorepoRoot;
-
-  return getFiles(defaultSourcesGlob, {
-    exclude: exclude && exclude.map(p => p.src),
-  })
-    .pipe(errorsLogger())
-    .pipe(newer({ dest: base, map: mapSrcToLib }))
-    .pipe(compilationLogger())
-    .pipe(
-      babel({
-        caller: {
-          // We have wrapped packages/babel-core/src/config/files/configuration.js with feature detection
-          supportsDynamicImport: true,
-        },
-      })
-    )
-    .pipe(
-      // gulp-babel always converts the extension to .js, but we want to keep the original one
-      revertPath()
-    )
-    .pipe(
-      // Passing 'file.relative' because newer() above uses a relative
-      // path and this keeps it consistent.
-      rename(file => path.resolve(file.base, mapSrcToLib(file.relative)))
-    )
-    .pipe(gulp.dest(base));
-}
-
-function createWorker() {
+function createWorker(useWorker) {
+  const numWorkers = require("os").cpus().length / 2 - 1;
+  if (numWorkers === 0 || !useWorker) {
+    return require("./babel-worker.cjs");
+  }
   const worker = new JestWorker(require.resolve("./babel-worker.cjs"), {
-    numWorkers: require("os").cpus().length / 2 - 1,
+    numWorkers,
     exposedMethods: ["transform"],
   });
   worker.getStdout().on("data", chunk => process.stdout.write(chunk));
@@ -263,8 +228,8 @@ function createWorker() {
   return worker;
 }
 
-async function buildBabel2(ignore = [], useWorker) {
-  const worker = useWorker ? createWorker() : require("./babel-worker.js");
+async function buildBabel(useWorker, ignore = []) {
+  const worker = createWorker(useWorker);
   const files = await new Promise((resolve, reject) => {
     glob(
       defaultSourcesGlob,
@@ -557,7 +522,7 @@ gulp.task(
   gulp.series("copy-dts", () => buildRollupDts(dtsBundles))
 );
 
-gulp.task("build-babel", () => buildBabel2(/* exclude */ libBundles, true));
+gulp.task("build-babel", () => buildBabel(true, /* exclude */ libBundles));
 
 gulp.task(
   "build",
@@ -576,11 +541,10 @@ gulp.task(
 
 gulp.task("default", gulp.series("build"));
 
-gulp.task("build-no-bundle1", () => buildBabel(undefined, true));
-// First complete build on workers for complilation speed
-gulp.task("build-no-bundle", () => buildBabel2(undefined, true));
-// Incremental builds is main thread for faster communication
-gulp.task("build-no-bundle-watch", () => buildBabel2(undefined, false));
+// First build on worker processes for complilation speed
+gulp.task("build-no-bundle", () => buildBabel(true));
+// Incremental builds take place in main process
+gulp.task("build-no-bundle-watch", () => buildBabel(false));
 
 gulp.task(
   "build-dev",
diff --git a/package.json b/package.json
index 21d69a87d176..3c5af654726e 100644
--- a/package.json
+++ b/package.json
@@ -53,11 +53,8 @@
     "flow-bin": "^0.123.0",
     "glob": "^7.1.7",
     "gulp": "^4.0.2",
-    "gulp-babel": "^8.0.0",
     "gulp-filter": "^5.1.0",
-    "gulp-newer": "^1.0.0",
     "gulp-plumber": "^1.2.1",
-    "gulp-revert-path": "^2.0.0",
     "husky": "^3.0.0",
     "jest": "^27.0.0",
     "jest-worker": "^27.0.2",
diff --git a/yarn.lock b/yarn.lock
index 74f808a9dc72..251a29e88e23 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5765,11 +5765,8 @@ __metadata:
     flow-bin: ^0.123.0
     glob: ^7.1.7
     gulp: ^4.0.2
-    gulp-babel: ^8.0.0
     gulp-filter: ^5.1.0
-    gulp-newer: ^1.0.0
     gulp-plumber: ^1.2.1
-    gulp-revert-path: ^2.0.0
     husky: ^3.0.0
     jest: ^27.0.0
     jest-worker: ^27.0.2
@@ -8837,7 +8834,7 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"glob@npm:^7.0.0, glob@npm:^7.0.3, glob@npm:^7.1.0, glob@npm:^7.1.1, glob@npm:^7.1.2, glob@npm:^7.1.3, glob@npm:^7.1.4, glob@npm:^7.1.6, glob@npm:^7.1.7":
+"glob@npm:^7.0.0, glob@npm:^7.1.0, glob@npm:^7.1.1, glob@npm:^7.1.2, glob@npm:^7.1.3, glob@npm:^7.1.4, glob@npm:^7.1.6, glob@npm:^7.1.7":
   version: 7.1.7
   resolution: "glob@npm:7.1.7"
   dependencies:
@@ -8965,20 +8962,6 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"gulp-babel@npm:^8.0.0":
-  version: 8.0.0
-  resolution: "gulp-babel@npm:8.0.0"
-  dependencies:
-    plugin-error: ^1.0.1
-    replace-ext: ^1.0.0
-    through2: ^2.0.0
-    vinyl-sourcemaps-apply: ^0.2.0
-  peerDependencies:
-    "@babel/core": ^7.0.0
-  checksum: d4589095f5de3f9b823e119186966550a713d4aa5868e4efd094c84054e0864f336d5140fb9418d0b17d27c18224fc982be70e8ae53ad60c9c64915b080e817f
-  languageName: node
-  linkType: hard
-
 "gulp-cli@npm:^2.2.0":
   version: 2.3.0
   resolution: "gulp-cli@npm:2.3.0"
@@ -9018,17 +9001,6 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"gulp-newer@npm:^1.0.0":
-  version: 1.4.0
-  resolution: "gulp-newer@npm:1.4.0"
-  dependencies:
-    glob: ^7.0.3
-    kew: ^0.7.0
-    plugin-error: ^0.1.2
-  checksum: 4bdcc14ef83a8cf27e4e8eadde76c607f1af0096e446c77ad9ea72518a326f31aa623c79c3b3f26138bc91012f9c3f58a9167d907fdcfbed9b0a19e721d432d2
-  languageName: node
-  linkType: hard
-
 "gulp-plumber@npm:^1.2.1":
   version: 1.2.1
   resolution: "gulp-plumber@npm:1.2.1"
@@ -9041,15 +9013,6 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"gulp-revert-path@npm:^2.0.0":
-  version: 2.0.0
-  resolution: "gulp-revert-path@npm:2.0.0"
-  dependencies:
-    through2: ^2.0.0
-  checksum: c2b01db2942c084f8cb11cecff22663a3ab894cdf43daed601bdaa9c713797e11739415b46f18342171fb0c65c1fe57d18dd40f93da403002e99f453b5661d77
-  languageName: node
-  linkType: hard
-
 "gulp@npm:^4.0.2":
   version: 4.0.2
   resolution: "gulp@npm:4.0.2"
@@ -10803,13 +10766,6 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"kew@npm:^0.7.0":
-  version: 0.7.0
-  resolution: "kew@npm:0.7.0"
-  checksum: be928d4248c934f38edda580144533bc93751f6b81d34e01cb1ff4196e63faf8957f5d54e7ef5c6529cbfdcc8f63a1acd53511e20955744b27c7eae965445775
-  languageName: node
-  linkType: hard
-
 "kind-of@npm:^1.1.0":
   version: 1.1.0
   resolution: "kind-of@npm:1.1.0"
@@ -12619,18 +12575,6 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"plugin-error@npm:^1.0.1":
-  version: 1.0.1
-  resolution: "plugin-error@npm:1.0.1"
-  dependencies:
-    ansi-colors: ^1.0.1
-    arr-diff: ^4.0.0
-    arr-union: ^3.1.0
-    extend-shallow: ^3.0.2
-  checksum: d2e48e6b1884eb02dccb295213607a6a3da60156f5dc1b77a342577a4eb80195fb1194026dc3dd571591e678644947e56e944b21cf70568c49f18a2e375fd1df
-  languageName: node
-  linkType: hard
-
 "posix-character-classes@npm:^0.1.0":
   version: 0.1.1
   resolution: "posix-character-classes@npm:0.1.1"
@@ -13876,7 +13820,7 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"source-map@npm:^0.5.0, source-map@npm:^0.5.1, source-map@npm:^0.5.3, source-map@npm:^0.5.6, source-map@npm:~0.5.1, source-map@npm:~0.5.3":
+"source-map@npm:^0.5.0, source-map@npm:^0.5.3, source-map@npm:^0.5.6, source-map@npm:~0.5.1, source-map@npm:~0.5.3":
   version: 0.5.7
   resolution: "source-map@npm:0.5.7"
   checksum: 737face96577a2184a42f141607fcc2c9db5620cb8517ae8ab3924476defa138fc26b0bab31e98cbd6f19211ecbf78400b59f801ff7a0f87aa9faa79f7433e10
@@ -15226,15 +15170,6 @@ typescript@~4.2.3:
   languageName: node
   linkType: hard
 
-"vinyl-sourcemaps-apply@npm:^0.2.0":
-  version: 0.2.1
-  resolution: "vinyl-sourcemaps-apply@npm:0.2.1"
-  dependencies:
-    source-map: ^0.5.1
-  checksum: c1d826acf474831a58609e0d19f0f7e907cd6f2a347a67c2879aa44e149491f0b47449bfe906e9da54f026806196b3ac92f8ae4dfe3d3a44353baab1885a03b4
-  languageName: node
-  linkType: hard
-
 "vinyl@npm:^2.0.0":
   version: 2.2.1
   resolution: "vinyl@npm:2.2.1"

From 509593666137a53efd3bc927a2c1e60877140f30 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Fri, 4 Jun 2021 15:34:34 -0400
Subject: [PATCH 4/7] exit gracefully when CI does not have available workers

---
 Gulpfile.mjs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Gulpfile.mjs b/Gulpfile.mjs
index 7a5a7e8d5957..b98804677bed 100644
--- a/Gulpfile.mjs
+++ b/Gulpfile.mjs
@@ -250,7 +250,7 @@ async function buildBabel(useWorker, ignore = []) {
     promises.push(worker.transform(file, dest));
   }
   return Promise.all(promises).finally(() => {
-    if (useWorker) {
+    if (worker.end !== undefined) {
       worker.end();
     }
   });

From 9ed788038d8e364ce68eac2a874daefbc2e257cf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Fri, 4 Jun 2021 16:09:00 -0400
Subject: [PATCH 5/7] perf: less IO when dest is not entity

---
 babel-worker.cjs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/babel-worker.cjs b/babel-worker.cjs
index abd77a8818ab..6a27d27d1d9c 100644
--- a/babel-worker.cjs
+++ b/babel-worker.cjs
@@ -6,7 +6,6 @@ const fancyLog = require("fancy-log");
 
 function needCompile(src, dest) {
   let destStat;
-  const srcStat = statSync(src);
   try {
     destStat = statSync(dest);
   } catch (err) {
@@ -16,6 +15,7 @@ function needCompile(src, dest) {
       throw err;
     }
   }
+  const srcStat = statSync(src);
   return srcStat.mtimeMs > destStat.mtimeMs;
 }
 

From 71fd2e939e49036b17a3887012329c68744e99ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Wed, 9 Jun 2021 16:26:03 -0400
Subject: [PATCH 6/7] perf: pipe worker stdout/stderr to parent process

---
 Gulpfile.mjs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Gulpfile.mjs b/Gulpfile.mjs
index b98804677bed..3afefc667232 100644
--- a/Gulpfile.mjs
+++ b/Gulpfile.mjs
@@ -223,8 +223,8 @@ function createWorker(useWorker) {
     numWorkers,
     exposedMethods: ["transform"],
   });
-  worker.getStdout().on("data", chunk => process.stdout.write(chunk));
-  worker.getStderr().on("data", chunk => process.stderr.write(chunk));
+  worker.getStdout().pipe(process.stdout);
+  worker.getStderr().pipe(process.stderr);
   return worker;
 }
 

From 9203e0f3b61f0f66a90b739fac389b55bb687db7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Fri, 11 Jun 2021 11:05:00 -0400
Subject: [PATCH 7/7] Update Gulpfile.mjs

Co-authored-by: Brian Ng <bng412@gmail.com>
---
 Gulpfile.mjs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Gulpfile.mjs b/Gulpfile.mjs
index 3afefc667232..42b0d2159b59 100644
--- a/Gulpfile.mjs
+++ b/Gulpfile.mjs
@@ -541,7 +541,7 @@ gulp.task(
 
 gulp.task("default", gulp.series("build"));
 
-// First build on worker processes for complilation speed
+// First build on worker processes for compilation speed
 gulp.task("build-no-bundle", () => buildBabel(true));
 // Incremental builds take place in main process
 gulp.task("build-no-bundle-watch", () => buildBabel(false));