投稿時間:2023-03-26 22:17:50 RSSフィード2023-03-26 22:00 分まとめ(21件)

カテゴリー等	サイト名等	記事タイトル・トレンドワード等	リンクURL	頻出ワード・要約等/検索ボリューム	登録日
AWS	lambdaタグが付けられた新着投稿 - Qiita	SeleniumをLambdaで実行する(快適な)環境を作る	https://qiita.com/K5K/items/1180f73d7e3e74493a40	lambda	2023-03-26 21:24:39
python	Pythonタグが付けられた新着投稿 - Qiita	”MDN Web Docs”を用いたjavascript学習　その１	https://qiita.com/tiaki731657/items/3fe6d4c42edc7053501e	javascript	2023-03-26 21:38:07
python	Pythonタグが付けられた新着投稿 - Qiita	【matplotlib】カラーバの目盛数などを色々と調整したい	https://qiita.com/yusuke_s_yusuke/items/2553c57186f3d06be4d1	matplotlib	2023-03-26 21:29:36
python	Pythonタグが付けられた新着投稿 - Qiita	SeleniumをLambdaで実行する(快適な)環境を作る	https://qiita.com/K5K/items/1180f73d7e3e74493a40	lambda	2023-03-26 21:24:39
js	JavaScriptタグが付けられた新着投稿 - Qiita	”MDN Web Docs”を用いたjavascript学習　その１	https://qiita.com/tiaki731657/items/3fe6d4c42edc7053501e	javascript	2023-03-26 21:38:07
Ruby	Rubyタグが付けられた新着投稿 - Qiita	【Ruby on Rails】Active StorageのN＋1問題	https://qiita.com/sekkey_777/items/8399de34c0cd61a55f8c	activestorage	2023-03-26 21:55:16
Ruby	Rubyタグが付けられた新着投稿 - Qiita	railsコマンド、rakeコマンドが通らない時に起きてたエラー	https://qiita.com/tomomomo1217/items/8f3664f45856e31c86ed	macrbenv	2023-03-26 21:40:03
Linux	Ubuntuタグが付けられた新着投稿 - Qiita	ASP.NET Core Blazor Webアプリで Hello World する	https://qiita.com/fsdg-adachi_h/items/16d5d58e758beed8dd27	ubuntu	2023-03-26 21:39:26
AWS	AWSタグが付けられた新着投稿 - Qiita	君はなぜAWS12冠(全冠)を目指すのか？	https://qiita.com/inoue_d/items/f79c41240a6c5b9e1b2d	lcertificationsengineers	2023-03-26 21:45:15
AWS	AWSタグが付けられた新着投稿 - Qiita	SeleniumをLambdaで実行する(快適な)環境を作る	https://qiita.com/K5K/items/1180f73d7e3e74493a40	lambda	2023-03-26 21:24:39
AWS	AWSタグが付けられた新着投稿 - Qiita	運用保守でさらにスキルアップするための私の学習計画	https://qiita.com/gama1234/items/e4db29397a45ae4d0a4b	qiita	2023-03-26 21:11:30
Docker	dockerタグが付けられた新着投稿 - Qiita	Dockerで構築したRailsコンテナのログが表示されない	https://qiita.com/miu-P/items/9e6583f160941451ff30	docker	2023-03-26 21:47:41
Ruby	Railsタグが付けられた新着投稿 - Qiita	【Ruby on Rails】Active StorageのN＋1問題	https://qiita.com/sekkey_777/items/8399de34c0cd61a55f8c	activestorage	2023-03-26 21:55:16
Ruby	Railsタグが付けられた新着投稿 - Qiita	Dockerで構築したRailsコンテナのログが表示されない	https://qiita.com/miu-P/items/9e6583f160941451ff30	docker	2023-03-26 21:47:41
Ruby	Railsタグが付けられた新着投稿 - Qiita	railsコマンド、rakeコマンドが通らない時に起きてたエラー	https://qiita.com/tomomomo1217/items/8f3664f45856e31c86ed	macrbenv	2023-03-26 21:40:03
技術ブログ	Developers.IO	[レポート] #COP209 すべてを自動化する: 選択肢とベストプラクティス #reinvent	https://dev.classmethod.jp/articles/cop209-automate-everything-options-and-best-practices-reinvent-2022/	awsreinvent	2023-03-26 12:05:42
海外TECH	MakeUseOf	How to Install and Run Windows 11 on a Mac	https://www.makeuseof.com/run-windows-11-on-mac/	parallels	2023-03-26 12:46:16
海外TECH	DEV Community	How To Optimize Your React App’s Performance	https://dev.to/devland/how-to-optimize-your-react-apps-performance-1045	How To Optimize Your React App s PerformanceReact is a widely popular JavaScript library for building user interfaces The combination of its declarative nature JSX syntax and virtual DOM makes it an excellent choice for writing UI code However building large scale React applications that perform well can be challenging As the complexity of your application grows you may notice a decline in its performance which can significantly impact user experience Therefore it s essential to optimize your React app s performance to ensure it s fast responsive and efficient In this article we will explore the best optimization techniques you can use to make your React application run faster We ll also discuss identifying performance bottlenecks common pitfalls to avoid and specific strategies to optimize your app s performance Use Browser Performance ToolsThe most effective way to check your app s performance is through your web browser There are several in browser tools available that can give you accurate measurements and identify areas where your code may be slowing things down One such tool is Lighthouse The Lighthouse extension is a great way to check the basic roadworthiness of your application As well as checking performance Lighthouse will look at the accessibility of your web page and whether you are following best practices for the web It will check whether your pages are optimized for search engine robots and will look to see if your web application meets the standards required to consider it a progressive web application Figure dev to website performance checked by lighthouseYou can run a Lighthouse audit in two ways either on the command line or in a browser If you want to run audits on the command line you will first need to install the Lighthouse command npm install g lighthouseYou can then run an audit with the lighthouse command lighthouse http localhost The command line version of Lighthouse is simply an automated script for the Google Chrome browser It has the advantage to generate an HTML report of the audit which makes it suitable for use on a continuous integration server You can also use Lighthouse interactively within Google Chrome It s best to do this in an incognito window as this will reduce the likelihood of other extensions and storage interfering with the Lighthouse audit Once you have started Chrome and opened your application go to developer tools and then switch to the Lighthouse tab Then click the Generate audit button Lighthouse will refresh your page several times and perform a series of audits The performance audit will concentrate on six different metrics These metrics are known as web vitals The web vitals are metrics that you can use to track performance when applications are running in production Now that we understand how to check the performance of our React app let s delve into specific techniques that can help optimize its performance Use React Suspense and React Lazy for Lazy Loading ComponentsLazy loading components can significantly improve the performance of your React application by reducing the initial load time The idea of lazy loading is to load a component only when it is needed React comes bundled with React Lazy and React Suspense API so that you can render a dynamic import as a regular component Here instead of loading your regular component like this import LazyComponent from LazyComponent You can cut down the risk of performance by using the lazy method to render a component const LazyComponent React lazy gt import LazyComponent React lazy takes a function that must call a dynamic import This will then return a Promise which resolves to a module with a default export containing a React component The lazy component should be rendered inside a Suspense component which allows you to add fallback content as a loading state while waiting for the lazy component to load import React Suspense from react const LazyComponent React lazy gt import LazyComponent function MyComponent return lt div gt lt Suspense fallback lt div gt Loading lt div gt gt lt LazyComponent gt lt Suspense gt lt div gt Memoising React Components with MemoReact memo is a function that you can use to optimize the render performance of pure function components and hooks It has been introduced in React v Memo derives from memoization It means that the result of the function wrapped in React memo is saved in memory and returns the cached result if it s being called with the same input again Now let s see how it works The basic usage looks like the following you have to wrap your function component in a React memo function This tends to look better with inline style functions const Title React memo gt let eventUpdates React useRef return lt div className black tile gt lt Updates updates eventUpdates current gt lt div gt This little change will help you improve the rendering performance of your components Tree shakingTree shaking is a technique used in modern JavaScript applications to eliminate unused code from the final bundle In a large React application there may be many components functions and other code that is not necessary for a particular page or feature Tree shaking enables you to remove this unused code reducing the bundle size and improving the performance of your application Tree shaking works by analyzing the dependencies of your code and removing any code that is not used or referenced This is done by the bundler tool such as Webpack during the build process When you import a module the bundler will only include the parts of the code that are actually used in your application To ensure that your React application can take advantage of tree shaking you should use ES modules and ensure that your code is modular and follows best practices for organizing and importing exporting code Additionally you should avoid importing entire libraries when you only need a small part of them Optimizing your imagesOptimizing images is an important part of improving the performance of any application including React applications Large and unoptimized images can slow down your web applications and make it take longer to load Here are some techniques you can use to optimize your images Compress your images Image compression reduces the size of your images without significantly affecting the quality There are several image compression tools available such as TinyPNG JPEGmini and Kraken io that can compress your images without losing quality Use the appropriate image format Different image formats are better suited for different types of images For example JPEG is better for photographs while PNG is better for images with transparent backgrounds Resize your images Large images can slow down your website Resizing your images to the appropriate size can reduce the size of your images and improve the performance of your web application Lazy load your images Lazy loading images means that images are loaded only when they are needed such as when they appear on the user s screen We have addressed this particular technique in the second section of the article Use responsive images Responsive images adapt to the size of the user s screen which can improve the performance of your website on different devices Use the srcset and sizes attributes to serve the appropriate image size for each device SummaryIn this article we have covered five approaches that can be used to improve the performance of React applications and reduce production bundle size These can provide great improvements to a lot of users especially those with a slower internet connection or lower end devices that do not have as powerful CPUs	2023-03-26 12:22:23
Apple	AppleInsider - Frontpage News	Daily deals March 26: 31% off 24-inch iMac, 28% off M1 Pro 14-inch MacBook Pro, $50 off Kindle Scribe, more	https://appleinsider.com/articles/23/03/26/daily-deals-march-26-31-off-24-inch-imac-28-off-m1-pro-14-inch-macbook-pro-50-off-kindle-scribe-more?utm_medium=rss	Daily deals March off inch iMac off M Pro inch MacBook Pro off Kindle Scribe moreTop deals for March include off a TB Samsung QVO SATA III SSD off an Asus AC Wi Fi Router off an Apple Pencil Gen and more The inch iMac is a great buy for Sunday The AppleInsider staff scours the internet for can t miss deals at online stores to curate a list of stellar deals on popular tech gadgets including discounts on Apple products TVs accessories and other items We share our top finds in our Daily Deals list to help you save money Read more	2023-03-26 12:28:06
ニュース	BBC News - Home	Nitrous oxide: Laughing gas sales to be banned, says Gove	https://www.bbc.co.uk/news/uk-politics-65079772?at_medium=RSS&at_campaign=KARANGA	behaviour	2023-03-26 12:53:10
ニュース	BBC News - Home	New first minister will have no mandate - Sarwar	https://www.bbc.co.uk/news/uk-scotland-scotland-politics-65080560?at_medium=RSS&at_campaign=KARANGA	holyrood	2023-03-26 12:48:57