web-performance

Does Cumulative Layout Shift stop measuring on user-interaction?

由 邮差的信 提交于 2021-02-02 09:46:06
问题 Does the Cumulative Layout Shift metric stop measuring on user-interaction? Google's guidance on Cumulative Layout Shift says: Layout shifts that occur in response to user interactions (clicking a link, pressing a button, typing in a search box and similar) are generally fine, as long as the shift occurs close enough to the interaction that the relationship is clear to the user. 回答1: It's important to remember that Cumulative Layout Shift (CLS) is not just focused on page load. Many of the

Does Cumulative Layout Shift stop measuring on user-interaction?

由 荒凉一梦 提交于 2021-02-02 09:45:25
问题 Does the Cumulative Layout Shift metric stop measuring on user-interaction? Google's guidance on Cumulative Layout Shift says: Layout shifts that occur in response to user interactions (clicking a link, pressing a button, typing in a search box and similar) are generally fine, as long as the shift occurs close enough to the interaction that the relationship is clear to the user. 回答1: It's important to remember that Cumulative Layout Shift (CLS) is not just focused on page load. Many of the

Is it possible to set cookies to Page Speed Insights tests?

由 廉价感情. 提交于 2021-01-29 18:11:45
问题 When using WebPageTest it is possible to use custom scripts to set cookies. Is it possible to do the same on PageSpeed Insights or lighthouse? For example in the European Union you may want to set cookies to disable the cookie consent popup which will not appear for repeat users who have already consented to the website's cookie policy. 回答1: Page Speed Insights Page Speed Insights (PSI) is designed for simulating a first time user to the site, so your cookies popup would always show. It does

Using HTTP/2 with angularJS

由 白昼怎懂夜的黑 提交于 2020-03-02 09:05:13
问题 I am trying to find out ways to increase the performance of my web application when I stumbled upon HTTP/2. On reading about it, I got to know that it has very many features to increase website performance. Coming to the implementation part of it, I see that you only have to upgrade your browser to the latest version for it to come to use. Since my browser is already at the latest version, I see that all of my resources - CSS, JS and HTML files are served with HTTP/2. However, the data

render-blocking Javascript at end of body tag - inline vs external script

由 天涯浪子 提交于 2020-01-05 03:51:10
问题 This is a follow up based on observations of a previous question. It made sense to discuss this as a separate question and to not make the original question too broad. As per my understanding, javascript by default is render blocking and it stops DOM parsing, which seems to suggest that the page would only be rendered after all synchronous scripts have executed. Consider the below example: Case 1: <html> <head> </head> <body> <div>Some Content</div> <div>Some Content</div> <div>Some Content<

Azure Long Response Time bottleneck?

由 那年仲夏 提交于 2020-01-04 09:04:21
问题 How does one diagnose performance (response time) bottlenecks in Azure? I've got a .NET Core website on Azure that consists of a web app service and one SQL database. I've set up load test and deployed it via the cloud to hit the website. Configuration properties for the load test agents are 4 cores start at 10 simultaneous users, + 10 every 20 seconds, up to 150 users 5 second think time between requests Web app resource allocation is as follows 2 instances of 4 Core, 7GB RAM (S3 Standard)

facing JavaScript required error when running vsts webtest

由 随声附和 提交于 2019-12-12 01:56:14
问题 when running recorded webtest in VSTS 2010 ultimate facing JavaScript required error for many https requests, please help me to take it further for load testing. 回答1: Visual Studio's web tests send and receive HTTP(S) messages. They do not execute or have anything to do with JavaScript or any other "active" elements of the web pages. Any Javascript activity by the web pages must be simulated in the web test. Often web pages have HTML to display a message that Javascript is required. These web

Long time waiting Request to Service Worker

由 南楼画角 提交于 2019-12-08 16:04:54
问题 I have noticed that the time waiting for service workers to respond with items from the cache is not as fast as you would expect it to be. I have seen the same wait times with both sw-precache and a custom written service worker. What are the possible causes for this wait time time and how could I reduce it? My fetch event on the custom service worker looks like: self.addEventListener('fetch', function(event) { event.respondWith( caches.match(event.request).then(function(response) { if
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