Quite slow incremental build performance

Bug Report

Ionic version:

[x] 4.x

Current behavior: Curently it takes about 3-7 seconds (depending on CPU) to see the updated code after you edit one line in an ionic serve. I have a xps15 with a i7 8750H and CPU is fully available to webpack. I guess it is also a big draw on the battery for our mobile fellow devs.

Expected behavior: As a developer, it is important to see as close to instant feedback ideally of how stuff looks like, would make the Ionic developer experience much better / be a big + for the project. Not too sure if Ionic can improve the webpack process or if we need to wait for angular to use bazel for instance.

Steps to reproduce: Just follow the ionic beta documentation, setup an ionic 4.x.x project with the following command :

ionic start myApp tabs --type=angular
cd ./myApp
ionic serve

Other information:

Ionic info:

Ionic:

   ionic (Ionic CLI)             : 4.6.0 (C:\Users\romai\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework               : @ionic/angular 4.0.0-rc.0
   @angular-devkit/build-angular : 0.10.7
   @angular-devkit/schematics    : 0.7.5
   @angular/cli                  : 7.2.0-beta.2
   @ionic/angular-toolkit        : 1.2.2 (C:\Users\romai\ideaProjects\gitalye\node_modules\@ionic\angular-toolkit)

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.2, cordova-plugin-ionic-webview 2.0.1, (and 6 other plugins)

System:

   NodeJS : v11.6.0 (C:\Program Files\nodejs\node.exe)
   npm    : 6.5.0
   OS     : Windows 10

[godenji]

I work on the backend in Scala, which has a notoriously slow compiler; Ionic + Angular + Webpack is dog slow in comparison, impressive 😃

If you look at, for example, BuckleScript + ReasonML, where a clean build of the entire project is often under 1 second, you have to wonder what’s gone off the rails with the frontend ecosystem at large, where trivial changes cause incremental builds > 10 seconds.

To be fair, Ionic + Angular does everything (js, css, markup), so there’s more work to do – would be nice to trim down incremental builds to the 2-3 second range in order to keep development flow smooth.

[ionitron-bot[bot]]

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