Webpack 4 slow. Aug 18, 2021 · Webpack 4 is still using the 1.
Webpack 4 slow Share Add a Comment Sort by: Best Open comment sort options absreim • May 3, 2022 · The Carbon project with its default configuration (Webpack 5 without code-splitting or lazy compilation) takes 61 seconds to start the dev server and render a story in the browser, about the same time as it takes Webpack 4. 1. 0 or above. I have the following webpack. 0 and this has resulted in increased build times from 2-3minutes to ~15minutes for my React SPA. js, set the options. Instantly update the browser when modifications are made to CSS/JS in the source code Jan 5, 2021 · On vercel. 0, same problem exists and it turns out I'm not the only one: Slow webpack build time (advanced module optimization). Actual Behavior Hot reload time increased from ~5s to ~10s when upgrading from Webpack 3 to Webpack 4. This post solved my problem, but as webpack updates, this plugin doesn't work anymore. Both cache types act the same way. This guide is designed for developers who are already familiar with Angular and want to improve their build process, as well as those who are new to Mar 9, 2018 · It seems that webpack gets stuck on 92% chunk asset optimization for about 30+ seconds to show a simple js/css change. Understanding why our build got 15x slower with Webpack 5 - Tines Engineering After upgrading to webpack 5 in our project we noticed that rebuild time increased more than 2 times comparing to webpack 4. exports = { // watch: true, }; tip Feb 1, 2025 · Fix slow Webpack builds by optimizing caching, reducing module bloat, and improving loader efficiency to achieve faster development and production performance. js can result in significant performance improvements. js, an already minified file that has very long lines) and generate a sourcemap with columns. Since then we shipped a lot of features without breaking changes. Mar 18, 2020 · Bug report What is the current behavior? webpack is taking too much time to rebuild If the current behavior is a bug, please provide the steps to reproduce. Feb 2, 2021 · Found 428 errors. If that's the case, let me know and I'll move it. com webpack 5 seems a bit faster than webpack 4 for us. May 8, 2018 · My webpack-dev-server gets work very slow. We know that people dislike major changes with breaking changes. Why is there a lot of apprehension with WP? After getting a general template set up it seems relatively straightforward and the most flexible option. however, the versions are diff. 0. webpack -watch is about 90% faster. 2 recently. cache folder of terser-webpack-plugin and css-minimizer-webpack-plugin. Apr 11, 2017 · We're having a hard time trying to migrate to webpack our project, which is currently based in requirejs. Upvoting indicates when questions and answers are useful. Everything is working fine except that every change i made to the code it takes up 2 3-4 seconds !!! till I see it in the browser. Chrome DevTools and the latest Node. 10. This can lead to excessive resource consumption, slow developer workflows, and even process crashes. By default optimization. First, use this strategy to split your config files for production and for development. on v3 dev-server it worked fine but on v4 it is taking lot of time to build and every time its building whole pr Webpack can watch files and recompile whenever they change. 0 to the newly released 5. With the same JS/SASS code and Webpack, my compile time is 6 sec. 5 minutes for webpack to bunde everything webpack is a module bundler. If you compile a bigger and slower page after and then go back to the smaller page, it is suddenly very slow to compile as well. Disclaimer: babel-loader is a third-party package maintained by community members, it potentially does not have the same support, security policy or license as webpack, and it is not maintained by webpack. Oct 10, 2020 · Webpack 4 was released in February 2018. Even I change just the JavaScript files the CSS rebuilds? Also the CSS compilati Jan 22, 2021 · Webpack 5 is consistently ~30% slower for all our packages compared to Webpack 4 #12475 Unanswered JonWallsten asked this question in Q&A edited Jul 9, 2018 · Bug report What is the current behavior? Webpack is very very slow, in webpack 3 recompile time (hot reload) was 1~3s now (webpack 4) its above 3min If the current behavior is a bug, please provide Mar 16, 2018 · Originally posted this issue on webpack-dev-server's repo, but was told nearly all of HMR is handled by Webpack itself, so I am moving that issue over here. Sep 27, 2018 · i developed react app,before that i built same app on webpack v3 now i upgrade to v4. webpack-dev-server after v3. Upgrade to the Latest Versions Using the latest stable versions of both Webpack and Node. The stats data made available through Node and the CLI. This means that after the initial build, webpack will continue to watch for changes in any of the resolved files. What's reputation and how do I get it? Instead, you can save this post to reference later. Everything builds fine but it takes a long time. so, accurate comparison seems impossible. These problems, collectively known as 'Webpack Excessive Bundle Size, Slow Build Times, and Memory Leaks,' can severely impact application performance and development speed. I first noticed Oct 17, 2021 · We are looking to upgrade our application from using webpack-dev-server@3. 96. 9 to 5. If we stop our Webpack bundling process and start it over, it will catch up from the last cache point. This can significantly speed up development in a few ways: Retain application state which is lost during a full reload. Additionally, each bundler has its own Chunk Graph Algorithm and chunk-splitting methods, which critically affect bundle size — a key concern for consumer-facing websites. Oct 31, 2024 · Bug report Hi team, I just bumped my webpack from 5. But why? Looking at the implementation of Fast_ArrayConcat it bailed immediately if a call to Protectors::IsIsConcatSpreadableLookupChainIntact returned false. Maybe excluding dependencies like Dec 23, 2020 · I am using the Webpack DevServer for development and it consistently takes about 8 seconds to recompile the project. api to modern-compiler for the sass-loader rule. Sep 14, 2023 · Keep Webpack Fast: A tried and tested guide for better build performance Webpack is a powerful asset bundling tool for frontend development. When i was using v2. 8 seconds. checkWasmTypes is enabled in production mode and disabled elsewise. Jul 22, 2021 · I have a really big project with the build splitted with DLL (but it doesn't seem to be related to this). 6. My slow times are now around 3 seconds while "cached" or back to back saves are roughly 1. Feb 7, 2024 · Uncover the secret Webpack optimizations to fix slow load times and transform your web applications for blazing-fast performance. Sep 19, 2023 · We opt-in Webpack persistent cache using the filesystem, to avoid consuming a lot of memory, and to also speed up rebuilds. This is too long for anyone sane to sit and wait that much of their life to see Aug 12, 2023 · Here, we’ll explore 15 proven strategies to speed up your Webpack build, making your development process smoother and more enjoyable. Operating System: Mac OS High Sierra Node Version: 8. Avoid retrieving portions of the stats object unless necessary in the incremental step. 6. Update to sass-loader version 14. js file: 'use strict'; var path = require ('path'); var webpack = require ('webpack Aug 14, 2024 · Webpack’s sass-loader also has support for the Compiler API. Apr 30, 2019 · I compile my JS and SASS with Webpack since a few. It's very slo Oct 21, 2020 · When I run webpack it takes waaay more time than eslint-loaded. In your webpack. Enable Caching Caching can Dec 4, 2017 · I'm using React + Redux + Webpack but having an annoying development experience when every time I rerun the node server (using JetBrains WebStorm) it takes 2. Does the build time reduces when you turn off the minimizing ? Jan 4, 2016 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. You can optionally only include certain tools for production builds, or explore using the default Turbopack bundler and configuring loaders instead. 0 NPM Version: 5. webpack is a module bundler. 11. What is the size of your final bundle ? IMO the bottleneck is either the CPU or the drive. Is this normal? I just followed the "Migrate from eslint-loader" instructions from the docs Operating System: mac Node Version: 10. 7. Profile Bundle Composition Audit with --display-modules Identify duplication candidates 3. May 7, 2020 · A good understanding of webpack's underlying principles can vastly improve your bundle size, application performance, and user experience. Dec 26, 2018 · I updated webpack from v2. Just follow the idea, don't follow the configurations because some of them are outdated. Whether the problem is slow performance on a large project or an unhelpful traceback, the following utilities can make figuring it out less painful. optimization. Check custom webpack settings If you've added custom webpack settings, they might be slowing down compilation. js Jan 15, 2025 · Introduction Brief Explanation Angular and Webpack: A Step-by-Step Guide to Optimizing Your Build Process is a comprehensive tutorial that will walk you through the process of optimizing your Angular application’s build process using Webpack. 3 contained a substantial performance fix to minimize the amount of data retrieved from the stats object per incremental build step. Operating System: Mac OS High Sierra Nod Aug 5, 2024 · Development utilities such as webpack-dev-server, webpack-hot-middleware, and Storybook. watch boolean = false Turn on watch mode. 2 to webpack-dev-server@4. 99. I noticed I could go native sass, the problem is getting that to work along side Webpack. Consider if you really need them for local development. Sep 24, 2024 · Improving images and fonts plays an important role in web page performance. 0 to v4. Indeed @alexander-akait, for the webpack 5 build I'm using html-webpack-plugin on next branch (html-webpack-plugin@5 alpha) that supports Webpack 5 and html-webpack-harddisk-plugin@1. Webpack 4 outputs a large amount of data with its stats. After a couple of weeks trying to replicate our current project status with webpack, we're Oct 12, 2020 · Using the latest Tailwind CSS (1. For some reason, webpack-dev-server is very slow at rebuilding. I've splitted it by functionality and type of files, so when starting in watch mode, webpack will watch less files as possible to improve build performance. Webpack version 4 came with a huge speed imporvements. This page explains how to enable this and a couple of tweaks you can make if watching does not work properly for you. We’ve tackled many performance issues with the new tools and libraries adopted along the way, and would like to share how we were recently able to improve our webapp build time drastically. Mar 13, 2018 · I apologize if I I should be posting this on the main webpack repo instead of here. However, developers often face complex issues such as excessive bundle size, long build times, and memory leaks. Jan 17, 2018 · webpack is a brilliant tool for bundling frontend assets. However, as projects grow in complexity, its … Dec 3, 2020 · Here is the cpuprofile for a Webpack 4 build And the cpuprofile for Webpack 5 build. Feb 28, 2021 · thanks for the input! I turned off source maps and remove nested imported. It takes about 10 seconds on my MacB Jun 22, 2018 · I'm finding that webpack-serve is taking a lot longer to build than webpack-dev-server. There is also a proxy set. 8. 13 as of this writing), I'm seeing slowness very similar to #1620 & also #443, the performance of using HMR with webpack-dev-server and webpack 4 or 5 is quite slow. Jun 13, 2017 · I have an issue with webpack build times in my react application. min. to Jul 10, 2025 · I upgraded webpack from version 5. 5. 1 web The trope of “my webpack build is slow” is well worn into the ethos of modern web development; This does however not lay blame at the feet of any single tool, but rather is a measure of the systemic acceptance and use of webpack for building web applications. is there any update related to this? has the default value changed due to filesystem cache support? The CPU at around 40% is because webpack uses only a single thread. Especially with webpack, which people usually only touch twice a year, and the remaining time it "just works". These elements help shape Tagged with webpack, webdev. 14 with projectReferences: true, onlyCompileBundledFiles: true, declarations: false, transpileOnly: true ~142 seconds, 22MB memory ceiling (according to Windows Task Manager)but, of course, no errors found. js module. when rebuilding, Not files in the node_modules/. Aug 18, 2021 · Webpack 4 is still using the 1. Mar 3, 2012 · I check slow of each loader and plugin. But it doesn’t have to be that way, and so — after many hours of research, trial,… Mar 28, 2018 · 🔥 Speeding Up Webpack Seven 3 second changes to reduce build time by 77% Posted on 28 March 2018 by Stephen Cook Feb 25, 2018 · webpack 4 made some major improvements to the chunk graph and added a new optimization for chunk splitting (which is a kind of improvement over the CommonsChunkPlugin). 28. Other relevant informatio Feb 14, 2025 · Webpack is a powerful module bundler widely used in modern JavaScript applications. Before that, I used GULP for SASS, and compiling was very fast. 1/latest. When contributing to the core repo, writing a loader/plugin, or even working on a complex project, debugging tools can be central to your workflow. not a bug, but a performance issue here I have a simple configuration with webpack-dev-middleware and webpack-hot-middleware that uses Hot reload (HMR) with react. 18 I'm having a performance issue when using webpack-dev-server to compile my asset. 95. However, enabling lazy compilation cuts that time in half to 30 seconds. My question is, is this how long Webpack normally takes to recompile a small project? After fiddling around with Vite and Parcel, I think I will be using Webpack for my projects going forward. There is a performance issue, so please check it out. -serve takes twice as long for the initial build and about 10x as long for a simple hot build. 3. 2 Nov 17, 2021 · Sure enough, our test case was going down the slow path on Webpack 5, but not on Webpack 4. I have both of them set up at the same time, as shown in the image below. webpack & ts-loader with transpileOnly: true, sourceMap: false and no devtool. Save valuable development time by only updating what's changed. webpack 4 & ts-loader v8. 4. 1 version of webpack-sources, in which version these lines are super slow, especially for those files whose lines are very long. However, we are noticing that with wds v4, webpack seems to be compiling the application which takes over a minute before the bundle is served to the browser. Map Routes to Bundles Pinpoint optimization opportunities 4. webpack. config. 0, and the webpack build time increased from 5 minutes to 30 minutes. Jan 30, 2025 · Webpack is a powerful module bundler used in modern front-end development, but developers working with large-scale applications often encounter a rarely discussed yet critical issue: Webpack builds failing due to memory exhaustion and long compile times. toJson() by default. I came across this problem when my webpack 4 trying to load exceljs (which actually loads exceljs. But shipping features without breaking changes also has a cost: We can't do major API or architectural Bug report What is the current behavior? Webpack is very very slow, in webpack 3 recompile time (hot reload) was 1~3s now (webpack 4) its above 3min. Optimize memory usage Aug 18, 2021 · Upgrading Webpack 4 → 5 Smaller bundles, faster build times, stricter checks, and fully typed Jan 19, 2021 · Improve Webpack build performance and significantly reduce build time with Webpack, Babel Loader, ESLint Plugin, and Stylelint Plugin Caches. Webpack runs optimizations for you depending on the chosen mode, still all optimizations are available for manual configuration and overrides. Establish Performance Baselines Set bundle size budgets Define core Web Vitals goals 2. Jan 10, 2018 · At Box, we’re modernizing our front-end architecture with frameworks such as react and redux, as well as webpack for the build process. Poor performance is the norm and not the exception. 0 webpack Version: 4. 2. Sep 1, 2024 · With a robust Webpack configuration tuned, we now bake optimizations into a systematic build process: 1. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset. Your config is the new config schema, based on webpack 4, só i'm going to do some tweaks to the basic one, and you can split them using the strategy i've linked See full list on dev. If the initial page that you compile is a smaller page, the compile and refresh time is very fast, like with webpack@4. 2. 100. Switch from sass to sass-embedded by running npm uninstall sass; npm install -D sass-embedded. checkWasmTypes boolean Tells webpack to check the incompatible types of WebAssembly modules when they are imported/exported. Upgrades often come with optimizations that make them faster and more efficient. js Hot Module Replacement (HMR) exchanges, adds, or removes modules while an application is running, without a full reload. 1. When things start to slow down, though, its batteries-included nature and the ocean of third-party tooling can make it difficult to optimize. rqcs tumljjk tmvvi mjoi yanll str turotz yvt kyhqxk bgvho xrhgql tpvol ysd nva hufrcq