Hovering over a bar will let you know the duration of the task and if it was considered "long". You should see tasks are now gray ("Task"). Look for a red flag in the main thread view. Record a trace in the Performance panel of loading up a web page. Tasks (shown in gray) have red flags if they are Long Tasks. To help ease your performance auditing workflow, DevTools now visualizes Long Tasks. Until now, you've needed to manually look for "long yellow blocks" of script over 50ms long in Chrome DevTools or use the Long Tasks API to figure out what tasks were delaying interactivity. Are there Long Tasks in my page that could delay interactivity? # If you don't, the connection between action and reaction is broken. Why 50ms? The RAIL model suggests you process user input events in 50ms to ensure a visible response within 100ms. Clicks and taps often don't work because event listeners, click handlers etc have not yet been attached.ĬPU-heavy Long Tasks occur due to complex work that takes longer than 50ms. 
While a web page is loading, Long Tasks can tie up the main thread and make the page unresponsive to user input even if it looks ready. But did you know Long (JavaScript) Tasks can contribute heavily to a poor TTI? What are Long Tasks? #Ī Long Task is JavaScript code that monopolizes the main thread for extended periods of time, causing the UI to "freeze". If you use Lighthouse to audit your pages, you may be familiar with Time to Interactive, a metric representing when users can interact with your page and get a response. Chrome DevTools can now visualize Long Tasks, making it easier to see tasks to optimize. QuestionMy system is unable to detect my gpu.Tl dr: Long Tasks can keep the main thread busy, delaying user interaction. QuestionBlue screen during Warzone match now unable to boot up properly. Unable to Boot or get into BIOS after changing bios settings to only UEFI no legacy Question Unable to access bios after posting
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