I have this website, that I think loads really fast and is nicely optimized, but whenever I run it through PageSpeed, it receives a horrible score on Mobile only? With “Minimize main thread work” being the main one, spending allegedly 124 seconds on Rendering? I’ve tried debugging it in DevT…
Tag: performance
Why is the split() method approx. 2x slower when the result is pushed to an array?
Consider the following code snippet: The output of this code is something like: Time needed: 2664ms. However, with the line // result.push(words); uncommented, the output is something like: Time needed: 4991ms. That’s approx. 2x slower (note that I’m measuring only the time needed by split(), but …
Performance metrics for Vuejs
I’m looking for performance metrics for a Vue app. Metrics regarding the whole app but also for some specific components. I know that I can use Vue.config.performance = true; and then run the performance dev tools and maybe I could use something like Performance Observer in order to do specific things o…
Move file to another directory in Jmeter
I’m trying to do performance test in Jmeter so before run my test i have to get fresh data, basically I need to move my used csv file after completed test execution. Answer Add setUp Thread Group to your Test Plan Add JSR223 Sampler to the setUp Thread Group Put the following code into “ScriptR…
Do get accessors incur a per-instance allocation cost?
Say I have a class defined like this: And then I create several instances like so: Are these get accessors allocated for each instance? That is, would the memory usage of each of those objects increase if I were to add more get accessors, or are the get accessors allocated once and simply shared amongst all t…
NextJS load external image Amazon
There is a specific url on amazon that stores some images on s3 that the amazon domain in question is already configured on the domain in next.config.js, but does not load on the front. If I put any external url, unsplah or other, it loads normally. The url in question is: idinheiro-admin-images.s3.sa-east-1.…
Why does my localhost application on Node.js take so long/refuse to connect?
Why does my localhost:3000 application take so long to load? I have tried quite a lot of ways to solve this, such as: Disable IPv6 Add localhost into the hosts file Update npm and node.js to the latest version The localhost doesn’t load, and eventually, just stops loading and refuses to connect. I don&#…
Javascript / Vue JS – Retrieve value of all elements in object
I have an object that retrieves 4 different elements with different numerical values. I’m trying to access and retrieve all these numerical values. The object returns the following: If I want to retrieve the value of the collectedTrashCount, I would simply do the following: The console.log in this case …
Difference when comparing the timing results of performance API and chrome’s developer tools
I am trying to time a fetch call. The following screenshot shows the time chrome developer tools show for a particular fetch request. As could be seen for the request marked in red color, total time it took was 79 milliseconds. Looks good. When I try to time using the performance api, the milliseconds are mor…
Performances of ‘lineTo’ method when going beyond canvas dimensions
Using a canvas context, assuming I call beginPath then twice lineTo with x=-999, y=-999 and x=50, y=50 then finally stroke, it will draw a line from the top-left corner to the (50,50) point. During the process did the top-left outside part of the line was draw from the outside or did it was draw from the visi…