From 38cc3b9e38d395ccd124ac5815fb8eccf04b355b Mon Sep 17 00:00:00 2001
From: Mark Sinclair <mmsinclair@gmail.com>
Date: Wed, 23 Mar 2022 19:24:55 +0000
Subject: [PATCH] Add webpack thread loader to speed up wallet build time

---
 nym-wallet/package.json                             |  1 +
 .../react-webpack-with-theme-example/package.json   |  1 +
 ts-packages/webpack/webpack.common.js               |  9 ++++++++-
 yarn.lock                                           | 13 ++++++++++++-
 4 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/nym-wallet/package.json b/nym-wallet/package.json
index 05ecd52512..1e83032807 100644
--- a/nym-wallet/package.json
+++ b/nym-wallet/package.json
@@ -92,6 +92,7 @@
     "react-refresh": "^0.10.0",
     "react-refresh-typescript": "^2.0.2",
     "style-loader": "^3.2.1",
+    "thread-loader": "^3.0.4",
     "ts-jest": "^27.0.5",
     "ts-loader": "^9.2.5",
     "tsconfig-paths-webpack-plugin": "^3.5.2",
diff --git a/ts-packages/react-webpack-with-theme-example/package.json b/ts-packages/react-webpack-with-theme-example/package.json
index 898b5d9a8c..780f684e75 100644
--- a/ts-packages/react-webpack-with-theme-example/package.json
+++ b/ts-packages/react-webpack-with-theme-example/package.json
@@ -57,6 +57,7 @@
     "prettier": "^2.5.1",
     "react-refresh-typescript": "^2.0.3",
     "style-loader": "^3.2.1",
+    "thread-loader": "^3.0.4",
     "ts-jest": "^27.0.5",
     "ts-loader": "^9.2.5",
     "tsconfig-paths-webpack-plugin": "^3.5.2",
diff --git a/ts-packages/webpack/webpack.common.js b/ts-packages/webpack/webpack.common.js
index bd37fba8ff..06231b26e9 100644
--- a/ts-packages/webpack/webpack.common.js
+++ b/ts-packages/webpack/webpack.common.js
@@ -5,6 +5,7 @@ const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');
 const WebpackFavicons = require('webpack-favicons');
 const Dotenv = require('dotenv-webpack');
 const path = require('path');
+const os = require('os');
 
 /**
  * Creates the default Webpack config
@@ -15,7 +16,13 @@ module.exports = (baseDir, htmlPath) => ({
     rules: [
       {
         test: /\.tsx?$/,
-        use: [{ loader: 'ts-loader', options: { transpileOnly: true } }],
+        use: [
+          {
+            loader: 'thread-loader',
+            options: { workers: Math.max(2, os.cpus().length - 1) },
+          },
+          { loader: 'ts-loader', options: { happyPackMode: true } },
+        ],
         exclude: /node_modules/,
       },
       {
diff --git a/yarn.lock b/yarn.lock
index d6f0fe9fbf..9090e8c12c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -12219,7 +12219,7 @@ loader-runner@^2.4.0:
   resolved "https://registry.yarnpkg.com/loader-runner/-/loader-runner-2.4.0.tgz#ed47066bfe534d7e84c4c7b9998c2a75607d9357"
   integrity sha512-Jsmr89RcXGIwivFY21FcRrisYZfvLMTWx5kOLc+JTxtpBOG6xML0vzbc6SEQG2FO9/4Fc3wW4LVcB5DmGflaRw==
 
-loader-runner@^4.2.0:
+loader-runner@^4.1.0, loader-runner@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/loader-runner/-/loader-runner-4.2.0.tgz#d7022380d66d14c5fb1d496b89864ebcfd478384"
   integrity sha512-92+huvxMvYlMzMt0iIOukcwYBFpkYJdpl2xsZ7LrlayO7E8SOv+JJUEK17B/dJIHAOLMfh2dZZ/Y18WgmGtYNw==
@@ -16906,6 +16906,17 @@ text-table@^0.2.0:
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
   integrity sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=
 
+thread-loader@^3.0.4:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/thread-loader/-/thread-loader-3.0.4.tgz#c392e4c0241fbc80430eb680e4886819b504a31b"
+  integrity sha512-ByaL2TPb+m6yArpqQUZvP+5S1mZtXsEP7nWKKlAUTm7fCml8kB5s1uI3+eHRP2bk5mVYfRSBI7FFf+tWEyLZwA==
+  dependencies:
+    json-parse-better-errors "^1.0.2"
+    loader-runner "^4.1.0"
+    loader-utils "^2.0.0"
+    neo-async "^2.6.2"
+    schema-utils "^3.0.0"
+
 throat@^6.0.1:
   version "6.0.1"
   resolved "https://registry.yarnpkg.com/throat/-/throat-6.0.1.tgz#d514fedad95740c12c2d7fc70ea863eb51ade375"