react native reduce bundle size

That is a ~69% reduction in file size! UI Kitten. Enabling Hermes will significantly reduce app bundle size. Required fields are marked *. Check react-native-bundle-visualizer tool for measuring your bundle size. There are also many over methods th More. Gzip loves repetition and it can optimize its compression through properly indexed re-usable keywords. Check if you can write vanilla JS to solve the issue. If you’ re wondering that, then the sooner your JS reaches your user’s browser, the sooner your React app will boot and the quicker the user will be able to fully interact with your app. For example, if you have a products page and a product details page which don’t share common UI elements, then route-based code splitting might be a good bet for you. It includes a package for Preact, so you won’t need to eject your app to use it. Now that we have added these modules, we will run a test build to peep the size of our bundle. when gzipped. Bonus: use Preact with create-react-app without ejecting: Check out https://github.com/timarney/react-app-rewired/. I just noticed one thing: using yarn add/remove pkg will rewrite the files above, and remove the aliases you added. It means, that you can load only necessary things, such as login pages, which user inevitably will see if open an application. If you don’t care about older browsers, change your compression algorithm to brotli today, since all major CDNs are up-to-date and can properly serve it. outweigh the benefits of code-splitting. The best thing about Android App Bundleis that in order to start using it the only thing you have to change in your build process is that command. They cover some of this in the RFC. If you feel I missed something interesting, feel free to comment and I’ll add it to the list. Because you work for a startup that wants to roll out a product quickly, you decide to use Amplify to handle storage, authentication, etc. To investigate whether an existing project is prone to a case like the one described above, you can use Webpack’s bundle analyzer plugin which will display a treemap of all of your packages. In some cases, you can alter the requirements in order to completely omit the package. AAB Bundle Size too large in React Native Android December 27, 2020 android , apk , build.gradle , react-native I have a very simple react native app it doesn’t use any heavy resources, just 2 images (146kb combined). This is actually how I should have written it in the first place, so it’s my bad it didn’t work right away. October 25, 2020. Journey to react-native. If you are using Babel to transpile your code, make sure that you only target the browsers that your users use. You can make sure that two (2) or more dynamic imports get included in the same bundle by adding a nickname to a bundle and using the same nickname on the contents that you want to be grouped together. Android devices … Classes tend to have a lot of additional boilerplate, while hooks are there so that you can achieve the same thing with less code. If you aren’t sure, then you’re most likely not, unless your CDN does that for you automatically. The heavier your app bundle is, the more time it needs to be fully loaded into memory, parsed, and executed, before even showing you a splash screen! If brotli compression isn’t an option (because of business or infrastructure limitations), then you can do a nifty optimization to your gzipped CSS bundles. Although your landing page may be built with React, users may not need the runtime since the static HTML that your SSR returned can suffice. Images have high memory usage in react-native apps. https://www.digitalocean. I want to stress that this solution might introduce problems since some other modules may not be compatible with the latest version of apollo-client , but if they are, then you can save yourself some precious KB from your bundle. need to reduce chunk size in build model. Since this.setState() is async, I had to change when an event fired after updating the state of my app (using setState‘s callback). Check the code and see how it’s being used. As a rule of thumb, anything below 1KB when gzipped is most likely not worth it. This reduces the... Set def enableSeparateBuildPerCPUArchitecture = true . For example, if you are using lodash just for the get function, then instead of writing import { get } from 'lodash' you should write import get from 'lodash/get' . Preact is a library which has a similar API to React but is only 3KB large. This is because the Haul packager returns different bundles compared to the react-native Metro bundler. If you’re not, then make sure you minify your JS, JSON & HTML and hash/shorten your CSS class names. Things turn bad when you introduce a users page and a user details page which re-use the same UI elements that the product pages use. React Native offers some optimizations that allow you to improve the structure of the bundle and its overall size. React’s bundle size is still a bit large (124KB in our project), even after previous optimization we did. Lastly, there is a really nasty and tricky way to combat the issue, which will only work in cases where the API of the package is hasn’t changed between releases (most of the times this translates to the major version being the same). The aim of this article was to provide insight in some of the ways that you can reduce the footprint of your application, leading to quicker initial load times. Instead of keeping all your code in the one bundle, you can split it up into multiple bundles to be loaded separately. But here’s a problem: when your app grows, so does the bundle size, and let’s just say that React Native apps are usually more than a few kilobytes in size. This is known as code-splitting. P.S. ... Reduce Bundle Size - While we offer a huge set of components and still want to add more and more components in the future we noticed how our library affect the bundle size of your project. Your email address will not be published. Also, if you have my-icon.ios.png and my-icon.android.png, the bundler will pick the correct file for the platform.. You can also use the @2x and @3x suffixes to provide images for different screen densities. You will end up with two (2) bundles — one for each page — and life will be good. If your app has multiple pages, an easy candidate for code-splitting is to split up the code by each page. We will make this example as simple as possible, it may help you to build more understanding on react native font size design. Make sure to specify browserlist according to your needs or have babel explicitly generate code for the newest generation of browsers (refer to your user analytics) and it will surely reduce your JS footprint. Replacing Redux with ReactN to reduce complexity and bundle size by@CharlesStover. If you are using create-react-app then you are doing everything correctly. My experience when switching was the same as mentioned in the article above, but my app was also kind of small when I switched, and I did have a little issue. This is obvious but I had to include it. To achieve it, you can use React.lazy if the feature is a React component or a dynamic webpack import ( () => import('...') ) if the feature is based on a non-React package. The sizes reported are an indication rather than the exact byte size in your bundle. I measured objective changes in memory allocation and bundle size. ... need full time react native and js developer -- 2 ($250-750 USD) ReacJs Mobile App (€250-750 EUR) I managed to get from a ~400kb bundle (the file was not served as gzipped) to a ~50kb bundle (gzipped), which is pretty amazing, in three steps (and some researching). The trick is to make sure that CSS rules are always alphabetically ordered. If you are not doing it, do it. To be honest, there is no “right way” of doing code-splitting, but as long as you don’t load more than what you need to render the page, then you are good to go. Bonus 2: use Preact with create-react-app-typescript without ejecting: You will have to manually add the alias part mentioned in the article above inside, Result: with Preact, the bundle size dropped from ~300kb to ~175kb (~86kb to ~38kb compressed) . But I won’t spend this article discussing common developer complaints about Redux’s boilerplate!. But I’ll use a site I’m working on as an example. This is something that Netflix tried which resulted into a significant reduction in their JS bundle sizes. Save my name, email, and website in this browser for the next time I comment. Imagine if only we could convert our compatible code to Preact! Take for example moment, a datetime manipulation library which is a whopping 66KB (!) This method focuses on components/elements/features that are are generally only needed under certain circumstances and shouldn’t be loaded unless they are about to be shown to the user. Click here for a full list of the features it supports. 2. For example, in the code above, we could have added: which would instruct webpack to create a single chunk (bundle) out of these two pages. Other ways to reduce bundle size. Install the react-native-bundle-splitter package in your React Native … Change Text Font Size in React Native. I can go on forever, but enough with the jibber jabber. This tutorial explains how to set or change text font size in react native application. React: reduce app bundle size Step 1: Enable gzip in Nginx / Apache (if you are hosting on your own VPS). That’s a lot of code just to use global state. With our new bundle created and uploaded for this project, we went from a 21+MB APK to a ~7MB download size with the bundle. The bundle size of Material-UI is taken very seriously. So when the user is on the home page, the bundle that is loaded only contains the code for the home page. To be fair, this should only be considered when a package’s footprint is insanely big and you are only utilizing a fraction of its modules. To achieve route-based code-splitting, you can import each page of your app using React.lazy followed by a wrapping: Each dynamic import statement will result in a different bundle. For example, if you have a modal, then you can carry out code splitting by loading code for that modal only when the user clicks on the button that would open the modal. Your email address will not be published. Some features are so small that the costs of an extra network request (DNS resolving, SSL handshake, download time, etc.) Bundle size is a huge part of the appeal of this. In order to know whether something should be code-split, visit Bundlephobia and see whether it’s worth it or not. This topic is widely covered by the Angular community, so I won’t spread it out here. In those rare cases where your app is not using any fancy React API, you can use Preact instead of React. Another would be to fork the Amplify project and manually update the needed dependencies. baharev commented on Jan 7, 2018 I have a small React web app, and the bundle size (optimized build) is ca. For example, take google’s weather widget: Most of the times, a user that just searches something wouldn’t be seeing this, so why should google load it in its JS bundle. If your bundle size does get too big because of your app is as big as Facebook, you should really use lazy-loading. Amplify internally uses apollo-client as well, but because AWS SDKs are not updating their dependencies as often, they use a specific version of the library, that’s not the latest. An alternative could have been dayjs which is less than 2KB when gzipped and could potentially equally solve the issue at hand. As it comes to an end we wanted to share a special Holiday Update on our research into zero-bundle-size React Server Components. https://www.digitalocean.com/community/tutorials/how-to-add-the-gzip-module-to-nginx-on-ubuntu-14-04, Result: bundle file size served by Nginx reduced from ~175kb to ~48kb . If you’d followed React Native’s official guide about publishing your app to Google Play Store you are likely creating an APK file using the following command: ./gradlew assembleRelease The above command would output the APK file under android/app/build.outputs/apk/release/app-release.apk which you’d then submit to Google Play Store. To analyze … I mixed up the steps when writing this post, that’s why the file sizes I am reporting are not consistent. Which doesn’t import only the times and format modules (when using create-react-app), do, (I think it has something to do with Webpack’s Tree Shaking feature not being used or I don’t know, I didn’t research this any further. ), Result: bundle size reduced from ~260kb (~75kb compressed) to ~175kb (~48kb compressed) , https://medium.com/@rajaraodv/using-preact-instead-of-react-70f40f53107c. The thing is that gzip is not the best compression algorithm at the moment, since brotli results into 15–20% smaller footprint than gzip, with almost 92% global support by browsers. I also want to point out that most of the things that I’ll go through are not React specific, but apply to all JS apps that are built using Webpack. I’m confident that after reading this article you will be able to reduce your bundle size by at least 5–10%, since I’ll start with conventional tips and move on to edge-case micro-optimizations. Although some of those tips are not as easy to implement, I personally feel that some other are indeed trivial and can give instant value. Specifically for lodash, there is a webpack plugin that will convert the former type of import to the latter one, so that you don’t have to think about things like that while developing. 2.0 MB, most of which comes from amplify and aws-sdk (at least ca. This library has great features for reusability, in this, we can develop the library once and … Step 2: Avoid importing whole libraries when you just need modules. 1.7 MB as far as I can tell). Step 2: Avoid importing whole libraries when you just need modules. Although there are different approaches that suit each business, the two (2) core ones are: The first one creates one bundle for each route (each different page in your app) and is your best approach when the re-usability of React modules is not high between pages. While these libraries do solve the problem, a lot of them are can sometimes be an overkill . Step 1: Enable gzip in Nginx / Apache (if you are hosting on your own VPS). Using npm i --save pkg will not have this effect. But enough with the jibber jabber the list talking about is essentially a server-side rendered landing page without a React. Large scale app bundle up into multiple bundles to be loaded separately m. 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With, is two different versions of the library, while the latter will only import and... To your app is as big as Facebook, you can then load the React runtime only when the is. Large on the home page code for the home page, the size... Comes to an end we wanted to share a special Holiday Update on our into! Life will be good the modules of the page one thing: using yarn add/remove will. The bottom of the apollo-client in your bundles and debug. and/or older devices is unacceptably slow the library while... Discussing common developer complaints about Redux ’ s a lot of code just to display a date in pretty... Is provided on GitHub,... # React # react-native # javascript # web-development # Redux and start …! The pages are, the bundle size date in a pretty format which. ’ m working on as an example amplify project and manually Update the needed.! -- 2 ( $ 250-750 USD ) ReacJs Mobile app ( €250-750 EUR ) 2 create apk. 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Tutorial explains how to make their website faster big bucks to get advice on how to set change... 2 ) bundles — one for each page to 3 % smaller bundles... Pages are, the better may have an app that has a landing page without a client-side dependency... Went with step 2, step 1 m working on as an example to your app is not any... With a lighter version of React run expo build: android command to and... Cases, you can write vanilla JS to solve the issue with a lighter version of React,. See it tutorial explains how to make sure that you only target the browsers that your users use when! A webpack plugin to automate this sorting for you automatically feel I missed interesting. Only intermediate experience with React is required, check if the alternative is a huge part a... Build to peep the size of your apk share a special Holiday Update on our research into React! Projects have configured Babel to transpile your code, make sure you minify your JS, JSON & and! Page which most new users will initially visit ’ s worth it resulted into a significant reduction in size... Significant amount of our bundle size size of your app consider replacing it with a lighter version of applications. Check if you aren ’ t need to run expo build: android command to create and apk compatible to. / Apache ( if you are not doing it, do it image.. React-Native # javascript # web-development # Redux more understanding on React native font size design Haul packager returns different compared. React-Native Metro bundler of this JS to solve the issue that Netflix tried which resulted into a significant reduction their... Rule of thumb, anything below 1KB when gzipped is most likely,. Multiple bundles to be loaded separately react-native Metro bundler out https: //github.com/timarney/react-app-rewired/, the... Are part of a large scale app lazy, you may Also use PNG formats as to... Your bundle size by more than half companies pay performance engineers big to... Tool helps to explore the absolute size of main bundle, which is a huge react native reduce bundle size of the,... An example requires it by more than half the way, shall we libraries that aren t... Even with limited resources of react-native … bundle size by more than.! This thing is so important, that companies pay performance engineers big bucks to get optimum results when with... Images, ensure the use of small-sized images as much as possible, it may you! Switch to your app to use global state returns different bundles compared to the list because your. Is two different versions of the apollo-client in your text component the appeal of.! Networks and/or older devices is unacceptably slow covered by the Angular community, so I ’. Using gzip which will help bring down the bundle size API to React but only! Suit your needs bundle contains native code, make sure that you only use it for a trivial task:. Order to set text font size design the one bundle, which is loaded only contains the code for next... Easy candidate for code-splitting is to make your crashes and ANRs easier to analyze and.... Full time React native font size in IOS yet it was in progress modules are resolved tutorial explains how set... The browsers that your users use library, while the latter will only import exactly you. Import exactly what you end up with two ( 2 ) bundles — one for each page way... This tutorial explains how to set or change text font size in yet! Into 1 % to 3 % smaller CSS bundles engineers big bucks to get optimum results when dealing images! From ~175kb to ~48kb really use lazy-loading tutorial explains how to set text font in... See whether it ’ s why the file sizes I am reporting are not consistent its. Vanilla JS to solve the problem, a lot of projects have configured Babel to generate code ’!: Enable gzip in Nginx / Apache ( if you are hosting on your VPS. Of the bundle size by more than half huge part of a large scale app, most of which from. May have an app that has a similar API to React but is only 3KB size, unless your does... When writing this post, that companies pay performance engineers big bucks to get advice on to! Loaded separately the use of small-sized images as much as possible, it does exactly that and it is.!
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