From 471efadeca854b666ccae9abb31c59365b4e7eca Mon Sep 17 00:00:00 2001
From: Tim Neutkens <timneutkens@me.com>
Date: Sat, 6 Feb 2021 22:52:18 +0100
Subject: [PATCH 1/2] Fix profiling plugin for next build

---
 .../build/webpack/plugins/profiling-plugin.ts | 28 ++++++++++---------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/packages/next/build/webpack/plugins/profiling-plugin.ts b/packages/next/build/webpack/plugins/profiling-plugin.ts
index 0371f6e0d0474..36642628990a6 100644
--- a/packages/next/build/webpack/plugins/profiling-plugin.ts
+++ b/packages/next/build/webpack/plugins/profiling-plugin.ts
@@ -85,14 +85,24 @@ export class ProfilingPlugin {
       compiler.hooks.environment,
       compiler.hooks.afterEnvironment
     )
-    this.traceHookPair(
-      'webpack-invalidated',
-      compiler.hooks.invalid,
-      compiler.hooks.done
-    )
+    if (compiler.options.mode === 'development') {
+      this.traceHookPair(
+        'webpack-invalidated',
+        compiler.hooks.invalid,
+        compiler.hooks.done
+      )
+    }
   }
 
   traceCompilationHooks(compiler: any) {
+    if (isWebpack5) {
+      this.traceHookPair(
+        'webpack-compilation',
+        compiler.hooks.beforeCompile,
+        compiler.hooks.afterCompile
+      )
+    }
+
     compiler.hooks.compilation.tap(pluginName, (compilation: any) => {
       compilation.hooks.buildModule.tap(pluginName, (module: any) => {
         const compilerSpan = spans.get(compiler)
@@ -118,14 +128,6 @@ export class ProfilingPlugin {
         spans.get(module).end()
       })
 
-      if (isWebpack5) {
-        this.traceHookPair(
-          'webpack-compilation',
-          compilation.hooks.beforeCompile,
-          compilation.hooks.afterCompile
-        )
-      }
-
       this.traceHookPair(
         'webpack-compilation-chunk-graph',
         compilation.hooks.beforeChunks,

From dd0a18e7d6e7b95c07d943bbd325eb074d2d98e2 Mon Sep 17 00:00:00 2001
From: Tim Neutkens <timneutkens@me.com>
Date: Tue, 9 Feb 2021 13:38:27 +0100
Subject: [PATCH 2/2] Add trace-debug command

---
 package.json | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package.json b/package.json
index aa124793cc3d5..8a001623e145d 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
     "lint-staged": "lint-staged",
     "next": "node --trace-deprecation packages/next/dist/bin/next",
     "trace": "node --trace-deprecation -r ./bench/instrument.js packages/next/dist/bin/next",
+    "trace-debug": "node --inspect --trace-deprecation -r ./bench/instrument.js packages/next/dist/bin/next",
     "debug": "node --inspect packages/next/dist/bin/next"
   },
   "pre-commit": "lint-staged",