From 4868a6c4d33722534e2174cd9848c4c5be22b4ca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Szabo?= <tomas.szabo@deftomat.com>
Date: Fri, 23 Aug 2019 09:38:46 +0200
Subject: [PATCH 1/2] Minor performance improvements

- use ESLint cache
- disable syntactic errors check in fork-ts-checker
- remove useless `watch` option in fork-ts-checker
---
 packages/react-scripts/config/webpack.config.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/react-scripts/config/webpack.config.js b/packages/react-scripts/config/webpack.config.js
index 12157a390b8..dc5eb9cd85c 100644
--- a/packages/react-scripts/config/webpack.config.js
+++ b/packages/react-scripts/config/webpack.config.js
@@ -334,6 +334,7 @@ module.exports = function(webpackEnv) {
           use: [
             {
               options: {
+                cache: true,
                 formatter: require.resolve('react-dev-utils/eslintFormatter'),
                 eslintPath: require.resolve('eslint'),
                 resolvePluginsRelativeTo: __dirname,
@@ -673,7 +674,7 @@ module.exports = function(webpackEnv) {
           }),
           async: isEnvDevelopment,
           useTypescriptIncrementalApi: true,
-          checkSyntacticErrors: true,
+          checkSyntacticErrors: false,
           resolveModuleNameModule: process.versions.pnp
             ? `${__dirname}/pnpTs.js`
             : undefined,
@@ -688,7 +689,6 @@ module.exports = function(webpackEnv) {
             '!**/src/setupProxy.*',
             '!**/src/setupTests.*',
           ],
-          watch: paths.appSrc,
           silent: true,
           // The formatter is invoked directly in WebpackDevServerUtils during development
           formatter: isEnvProduction ? typescriptFormatter : undefined,

From 04fbd999d6b8932dd80c30f3dfa125071e5fd30c Mon Sep 17 00:00:00 2001
From: Ian Schmitz <ianschmitz@gmail.com>
Date: Tue, 10 Sep 2019 22:10:54 -0700
Subject: [PATCH 2/2] Revert checkSyntacticErrors change

---
 packages/react-scripts/config/webpack.config.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/react-scripts/config/webpack.config.js b/packages/react-scripts/config/webpack.config.js
index dc5eb9cd85c..f2815cac78c 100644
--- a/packages/react-scripts/config/webpack.config.js
+++ b/packages/react-scripts/config/webpack.config.js
@@ -674,7 +674,7 @@ module.exports = function(webpackEnv) {
           }),
           async: isEnvDevelopment,
           useTypescriptIncrementalApi: true,
-          checkSyntacticErrors: false,
+          checkSyntacticErrors: true,
           resolveModuleNameModule: process.versions.pnp
             ? `${__dirname}/pnpTs.js`
             : undefined,