From there, you can use Chrome to debug your application just like it is in the browser Remote Debugging - VS Code Plugin. VS Code has a dedicated plugin for debugging apps built with. First, you need to install Chrome BETA on your Android device.Be aware that this allows any user of the production electron app to access dev tools with the common keyboard shortcuts (function: F12 or ctrl + shift + I on PC, cmd + option + i on Mac). What are the best developer tools for Mac OSX 38. Add to Chrome - Its Free Add to Edge - Its Free Add to Firefox - Its Free Add to Opera - Its Free Add to Brave. It doesnt include a lot of the functionality (system hooks) and look and feel of a first class Mac app.Now on your mobile phone go to the "Settings" app. Select "Developer Options" and ensure "USB debugging" is checked. If it is already checked and you have not used USB debugging on this computer before, uncheck it and check it again to ensure it has this computers' MAC address.
![]() Dev Tools App For Chrome On Free Add ToTo understand why it is slow, you have to measure what is slowing it down and how it is slowing it down. Profiling Your PagesLet’s say your page is slow and you want to optimize it. Luckily, Google Chrome DevTools has a couple of tools that can help you. But, when your application slows down, you’ll need to start looking into those deep corners of your codebase. They are the dusty parts of your application and could easily break (especially if you didn’t write automated tests). Also, piled up features and legacy code can prove problematic after some time if they are not taken care of along the way.The thing about legacy code and old features is that very few people in your team want to deal with them. There are a couple of ways to open them: Using the Performance Tab in DevToolsThe easiest way to do this is to open DevTools. What Chrome offers you for profiling is Performance profiling inside the Performance tab and Lighthouse inside the Audits tab in the Google Chrome DevTools (let’s just call them DevTools from now on). Mozilla Firefox also has its own set of tools for measuring performance, and you can find other resources and websites online that do the same, but today, we’ll focus on Google Chrome. Control f google for macOnce you’re done with the interaction, press Stop or the Record button again. For example, if you have some part of your application that’s slow, like a list of items being scrolled, try to scroll that list when the profiler is running. Click Customize and control Google Chrome Customize and control Google Chrome and then select More Tools > Developer Tools.Now that we’re in the DevTools, go into the Performance tab, and press the Record button to interact with your website. Press Command+Option+I (Mac) or Control+Shift+I. Press Command+Option+J (Mac) or Control+Shift+J (Windows, Linux, Chrome OS) to jump straight into the Console panel. Or press Command+Option+C (Mac) or Control+Shift+C (Windows, Linux, Chrome OS). The easiest way for me was to select a specific portion of the Timeline using my mouse. The first thing you should get acquainted with is moving around the Timeline. You should see something like this in your browser:This can be overwhelming at first and a bit scary, but don’t back down now! As you can see, the Performance tab offers a ton of features for you to look into, but we will only glance over a few common ones. Reading Performance RecordingsAfter you’ve simulated the behavior that affects your website’s performance and gathered the recordings, it’s time to analyze that data. After the application has loaded and you’re finished interacting with it, click the Stop button to get a recording. This will record what is going on and below the page while it’s being loaded. The purple area shows the Rendering and the green parts of the Timeline show the Painting process. JavaScript execution time is marked in yellow and it’s called Scripting. To be able to visually identify what was going on when you profiled your website, Timeline is painted in different colors. The Timeline shows what is going on with your website in each frame. The Layout process tries to come up with the sizing of your elements and where to put them on the screen. Style calculations is a process where the browser is figuring out which CSS rule applies to which HTML element. Then, the Rendering part comes in with Style and Layout coming into place. This is the JS part of your code that will result in some visual changes on your website. Each of these processes can slow down, and thus slow down the whole process of showing a frame to the end-user.You must be thinking, “OK, now what?” Hang on, we’re getting there. Compositing is a process that ensures that layers of your website are drawn in the correct order, for example, if you have elements that overlap each other. Paint is a process where colors, images, text, and shadows are drawn. Office 365 account manager for macTake a look at the call stack that is causing the most trouble by following the execution trace to the bottom. A flame chart is a data visualization of your call stack while you were profiling your app. If you’ve never read flame charts before, don’t worry, they are pretty intuitive. In that case, you should select the part of the Timeline that is marked as red in the FPS row and investigate the Main thread activity flame chart. Luckily, we just got familiar with what color represents which process, and with that knowledge, we can identify what might be wrong with the code behind it.This is a clear indicator that something in there is causing poor performance. Do not handle touch and scrolls on your own, for example.- Consider using requestAnimationFrame for those tricky DOM updates.- Delegate some of the work to Web Workers.If this is not enough, there is a great article about how to optimize JavaScript execution to improve your website performance.Another thing that might slow down your website directly is complex CSS which will show up in the Timeline as a lot of purple sections— Rendering. One of the solutions, in that case, is to stop triggering renders when they areOne of the guidelines for avoiding situations like these are:- Let the browser do the work it can. In React, you can achieve this by checking when a component should be rerendered using shouldComponentUpdate. This happened to me when I was using React and was triggering unnecessary renders that caused a lot of Style changes. This is one of the major causes of poor performance. In the Timeline, it will be marked as Scripting. Also, check out this detailed guide on performance analysis that explains everything that happens inside the Performance tab. This will avoid forced synchronous layouts and layout thrashing.- Use flexbox instead of the float technique for layout.You can find more great tips on solving performance problems in an article from Google Developers about analyzing runtime performance. The browser will then struggle with figuring out their size and position.- First, read element style, then change it. One good solution for this would be to avoid that practice somehow or resort to the fastdom library which batches read/write operations to the DOM so that the browser isn’t stressed too much.Some tips on reducing Rendering as a bottleneck:- Try not to have a lot of DOM elements. This will cause the browser to repeatedly calculate the layout over and over again. ![]()
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