Questions tagged [performance]
The art of tuning a website to deliver it's content quickly and efficiently to the user over a potentially low bandwidth connection.
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Chrome Lighthouse result for LCP don't match the Performance tab values
I'm running my app on localhost and I've been experiment with the Lighthouse tool to implement some optimizations. It's a statically built NextJS app, so it should be pretty fast.
This is the result I ...
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Why does my site's average position drop on weekends?
I noticed a weird patten in my GSC Performance chart - average position drops on weekends and rises back up on Mondays, peaking mostly the middle of the week.
The standard response "Well, people ...
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Time to FCP changes based on order of <h2> and <p> tags
I was troubleshooting why one particular page took a full second longer to reach FCP compared to similar pages for mobile according to Google's Page Insights. The difference ended up being the order ...
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How to measure processes in Total Blocking Time in Google PageSpeed?
I am trying to measure specific TBT as outlined in Google's documentation
The Total Blocking Time (TBT) metric measures the total amount of time between First Contentful Paint (FCP) and Time to ...
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How can I enable compression of 3rd party scripts to get a better Gtmetrix score?
If I test my website on the Gtmetrix, there appear like this :
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MediaWiki: Remove debug query strings (/load.php?debug=" )
When I run a Google PageSpeed insights test I get problem reports for various long URLs with query strings for /load.php?debug=.
These problem reports appear for the loading of any webpage whatsoever....
user58733
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How to determine how much memory 1 million particles in WebGL is using
I would like to know how much memory is being used by a system of 1 million particles in WebGL:
I am not really too sure on what to look for in the performance/memory panels in the Chrome devtools / ...
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3 seconds to TTFB in CloudFront
I'm trying to improve the speed of a site and I've noticed that it takes 3 seconds to download some images from CloudFront.
To download a 18kb image it takes 3 seconds:
And it's a Hit from ...
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Troubleshooting CPU Utilization Spikes on AWS ECS
Our production system has frequent spikes in CPU Utilization. These spikes occur even when the application does not have high usage. Here is an example of how we have CPU Utilization spikes frequently....
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How to minimize CLS (Cumulative Layout Shift) for responsive layouts?
What are some suggestions for reducing content layout shift for responsive layouts?
From researching https://web.dev/cls:
"Always include size attributes on your images and video elements, or ...
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How to determine if APCu is overall lighter than Memcached in a usecase?
I would say that my personal website is at least currently a "small" website.
It is a MediaWiki-based all-core website without images at all and of about 750 webpages of generally no more ...
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Largest contentful paint (LCP)>2.5
Google (GSC) has flagged almost half of my content as taking longer than 2.5 seconds to LCP on mobile. I've spent several days trying to optimize my site to reduce the time it takes, but I can't get ...
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Start Time of Page Load in Page Timings in Google Analytics
What's the start event for the 'Page Load Time' in the 'Page Timings' report?
I've read that GA uses NavigationTiming API. Is it v1? Is the start event performance.timing.navigationStart? Also, what'...
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Does "Last Painted Hero" time have an impact on SEO and search engine rankings?
Does "Last Painted Hero" (LPH) time have an impact on SEO and search engine rankings?
For instance, a 3rd party vendor decreased our LPH time from 16.200s to 1.200s.
We're running a separate SEO ...
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What is 'User Time' in web page speed tests?
I am running a few tests on my site's speed using https://webpagetest.org.
I noticed a metric in there called 'User Time'. Tried Googling and looking through the site documentation but could not find ...
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My WordPress site is slow when I'm not using a VPN
I host a WordPress site which isn't behaving as I'd expect.
Its taking an age to load, sometimes timing out before its finished.
However, if I have my VPN (PIA) enabled, it loads immediately and is ...
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What could cause occasional continued 404 errors that were originally triggered by high website traffic?
I have a website where one page received huge traffic in one moment, causing errors 404.
Next day, traffic returned to normal but some percent of this page visitors still receive this error (5-10%).
...
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Google Analytics considers Gleam App's loading time as a Page Loading time.
I have embedded the Gleam App widget on my client's website. Let me inform about the Gleam app first. The Gleam App is used for the Giveaways. The participant has to complete certain entries to get ...
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Improve performance of tracking scripts - facebook, linkedin google etc
I have Google Tag Manager setup to manage all my third party tracking scripts.
These include; LinkedIn, Facebook, Hubspot, Google Adwords/Remarketing etc.
Is there a way I can optimize the ...
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Some animated Adsense ads prevent the rest of the page from functioning
I've had this problem for the best part of 3 months now.
Since doing a major update in March, some recurring ads make the site unusable.
I've requested help on this issue multiple times but nobody has ...
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139
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Fastest .htaccess redirect from example.com to www.example.com?
Now using the standard cPanel-created Apache .htaccess redirect, but it's taking a full 2 seconds to go from ´example.com´ to ´www.example.com´.
Is there a faster method? Or should I let go of the ...
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Can images be combined using the clip CSS Property while still maintaining image SEO and semantics?
I have two images in my web page. Actually there are 20 but I want to keep things simple:
<div>
<img src="apple.png" alt="Apple" />
<img src="orange.png" alt="Orange" />
&...
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157
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Using SetEnvIf to not log overly accessed URLs
I'm trying to figure out how to craft my SetEnvIf's in my apache config so that the server hard disk isn't spinning 24/7 over log entries.
What I want to do is disable logging for all domains and ...
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Page speed performing poorly specifically on OS X versions of Chrome. What gives?
I'm digging into page speed within my Google Analytics, and saw that I'm having higher than average load times with Chrome, which was unexpected. Digging in further by operating system, the issue ...
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102
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change cpanel log file location
Is there a way in some configuration file to specify a new folder to put all the cpanel log files in, or is there a way to specify new log file names for each log?
I ask this because I want to store ...
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299
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Website Speed Index for SPA applications
I have a large SPA website, when measuring performance is there a standard metric to measure the time to transition between virtual pages? I know about speed index, but that only seems to cover ...
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Why am I getting poorer Lighthouse Performance scores after minimising my CSS?
I'm trying to improve my site's speed. I have an isolated development version of the website hosted on a staging server and am running Lighthouse tests against it (I take the average scores of 5 ...
- 1,363
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Which metrics to use to evaluate web hosting performance from all over the world?
I have a website that is hosted in Europe but most of the visitors are coming from the U.S. When testing the website from a quick USA VPN it shown really poor speed load performance: >6 seconds ...
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Running a ping and speed test from Africa, specifically countries with no large data centers?
I have a task to run network latency and speed tests from different parts of Africa.
Specifically, I would like to run a ping test for different URLs different times of the day from those parts.
These ...
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122
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Long relative download time of first downloaded javascript file in Chrome DevTools
I'm testing the performance of a website using the network tab of Chrome DevTools. When I open the web page in a fresh incognito window, I noticed that the first downloaded javascript, which is jquery....
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Does wordpress give a disadvantage to your page speed score?
I have a website for instance that only contains the default "Hello World" and other headers and internal links as it is a new wordpress installation. It uses the Twenty Nineteen theme which I believe ...
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What does these two "median" words mean in this Page Speed Test result?
Here is a copy:
First paragraph
Data from the Chrome User Experience Report indicates this page's
median FCP (1.7s) and DCL (1.8s) ranks it in the middle third of all pages. This page has a ...
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380
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Webpagetest.org - does repeat view display browser cache?
In the documentation is written, to generate the repeat view webpagetest closes the browser and launches it again. Does it mean, the browser cache goes on restart empty and doesn't play any role on ...
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Is there any threshold page load time to get spike in the conversion?
I was reading an article here where I found very interesting correlation of conversion rate and page load time. I can't get 2 things here:
Why graph is almost flat from 5 seconds to 11 seconds page ...
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Why are there 2 calls to the root of my site in firebug's Net panel
I am trying to diagnose performance problems on a website. The Net panel in Firebug is showing 2 calls to the site root that take place early in the process. Each call takes about 1.5 seconds of "...
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Logging what was in the content of a page
I'm one of the people working on a Java based website that has the apache httpd in front of it.
The content on the pages is migrating towards personalizing the content and as such just about every ...
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