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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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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 ...
Nelie's user avatar
  • 1
0 votes
1 answer
41 views

What about img blob data affect for seo & client performance [closed]

in simple cms project with some picture lower 1mb , save all image as blob data in database (exp: sqlite) is good idea for files management... How does this affect SEO? for example on: pageload web ...
Alireza Dini's user avatar
1 vote
1 answer
314 views

Adding GA4 using tag manager causes performance issue

I have added GA4 (google analytics 4) using GTM (google tag manager) and the google PageSpeedInsight complains about it and I get failed in Core Web Vitals Assessment: And here is how it complains: ...
Martin AJ's user avatar
  • 415
0 votes
0 answers
115 views

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 ...
jermspeaks's user avatar
0 votes
0 answers
116 views

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....
Manuel's user avatar
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2 votes
1 answer
25 views

TTFB vs SEO and My Site Location

I have a website and about 90% of the users are Brazilian, so I migrated my website to be hosted on a America/São Paulo server on Google Cloud Platform. However, after the migration I noticed that ...
Tom's user avatar
  • 121
1 vote
0 answers
363 views

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....
Maxim Dsouza's user avatar
2 votes
0 answers
199 views

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 ...
Harsha N Hegde's user avatar
3 votes
1 answer
291 views

Is setting Priority Hint fetchpriority=low for favicon.svg and/or site.webmanifest a good idea for website speed / Core Web Vitals?

I've noticed in a chromium desktop browser web console that the default priority (fetchpriority) for favicon.svg and site.webmanifest as assigned by the browser is high. Would it be a good idea to set ...
adrelanos's user avatar
  • 165
3 votes
0 answers
35 views

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 ...
cbdeveloper's user avatar
0 votes
1 answer
298 views

Preconnect domain for all images in page, not just first image

I use leaflet to display a map made of about 12 maptiles, that come from 4 Stamen subdomains, only differing with -a, -b, -c and -d middle part endings : stamen-tiles-a.a.ssl.fastly.net etc So as to ...
JLuc's user avatar
  • 103
3 votes
1 answer
39 views

Page load speed vs requests

Interestingly enough, in Wordpress, I have installed an update for a plugin which allows my website to be loaded 0.1s faster (structurally). However, when I check the performance logs (before after), ...
Johan's user avatar
  • 427
3 votes
3 answers
342 views

Does React JS Increase Page Load Time

Currently my website only uses HTML, CSS, and JavaScript. I know that the React JS library is about 30 KB. I am wondering if that 30 KB will be downloaded from my server by every user who visits my ...
Jack N's user avatar
  • 131
0 votes
0 answers
26 views

DMCA Notice on Website and Effecting Traffic of all Site [duplicate]

I have received the DMCA on my website and that is effecting the traffic of whole website. I am getting less impressions and clicks on google search console since last month. I have received the DMCA ...
bilal 12's user avatar
3 votes
1 answer
34 views

Does page weight matter if your Core Web Vitals scores are good?

At my company, we've done an excellent job showing people the value of using user-based metrics like the Core Web Vitals for performance testing. But this has also become a bit of a two-edged sword. ...
Dan Gayle's user avatar
  • 858
1 vote
1 answer
88 views

Minify at the web server level or at CDN level?

I run a Buddypress community-based website (Wordpress) and currently my site speed score is E. I am planning to buy WP Rocket because I really want to make my site faster. I use the following services:...
Huxtable's user avatar
1 vote
1 answer
45 views

What is the difference between uploading a file on CDN and having a file cached by CDN?

I have a website which is cached by CDN cloudfare. I have some js/css files which I want to upload. What is the difference in terms of performance and bandwidth consumed by my website between ...
user768421's user avatar
3 votes
2 answers
44 views

How to work with image sizes for different resolutions for a website?

On a casual desktop pc with 1920x1080px you would take an image with 1080px width for a background or slider image, but a website visitor with a WHQL resolution, would get a small or upscaled image ...
user avatar
2 votes
1 answer
542 views

Why would Google Analytics report slow loading times when other website testing tools show it is very fast?

I have a WordPress website that is well optimized on Pingdom, GTMetrix, and GPI. When I check on Analytics Speed timings some of its pages have an average load time speed of more than 3 seconds, you ...
Weynard at Kala Digital's user avatar
3 votes
1 answer
305 views

Should I change the 'preconnect' URLs from href="//" to href="https://"?

In order to speed up the load of my webpages, that use ads from Google Adsense, I'm considering to modify the following 'preconnect' directives: <link rel="preconnect" href="//...
Hookstark's user avatar
  • 423
3 votes
1 answer
255 views

Do smaller file sizes for webp really make it better than jpeg when rendering speed suffers?

Google claims that their WebP format is 25 to 34% lower than the equivalent JPEG quality. But in practice, using it significantly reduces the page rendering speed. Does it makes sense to sacrifice ...
saeed arab sheybani's user avatar
13 votes
2 answers
9k views

How to improve extremely slow page load time on a 23MB web page full of SVGs?

I have a webpage that is full of inline-SVG around 140+ inline SVGs! Just the HTML file size is 23MB, plus there is external CSS and JavaScript loading, though that is roughly only around 30KB. The ...
Syed M. Sannan - alt's user avatar
4 votes
1 answer
296 views

For a website behind a CDN, does it make sense to combine JavaScript into one file and host it on my server?

Currently, my website loads JavaScript libraries from several CDN providers (cloudflare, unpckg, etc.) and it is working through a CDN (cloudflare). Does it make sense to combine all third-party ...
Yuriy N.'s user avatar
  • 195
3 votes
1 answer
2k views

Why does my site load slower on the first attempt from an incognito browser?

My WordPress website is connected to Cloudflare CDN. It runs quite smoothly as of now. The site speed is quite good in general. However, when I load the website for the first time after like 10-15 ...
Shiva's user avatar
  • 133
4 votes
1 answer
68 views

Could a specific website be blocked or throttled for all users by Verizon

UPDATE: The issue was in fact a Verizon "routing" issue. I reached out to Verizon and was given the go around, so I contacted my host who did some testing. We used Nord VPN to mask the ...
Robert Dickey's user avatar
1 vote
2 answers
128 views

Why are my GTmetrix scores different in different locations?

The GTmetrix score of my website when tested in Vancouver differ from the results in Mumbai by a whopping 4 seconds! Different locations are giving me different results. What's happening here and ...
Arthur's user avatar
  • 11
2 votes
3 answers
123 views

Does a good but less than perfect Pagespeed Insights score hurt the chances of a page ranking in Google?

I put my portfolio website through the google speed test and it got a 86. What does this exactly mean? 86 out of 100 strikes me as a good score, what does this mean for the chances of a website with ...
Neil Meyer's user avatar
4 votes
1 answer
1k views

Should I use DNS prefetch and preconnect when loading resources from CDN?

In my web page I load around 12 resources from jsdelivr (CSS and JS). Should I optimize it with one (or both) of following techniques? If yes, should I put the tags right before loading tags or at the ...
Omid Shojaee's user avatar
1 vote
1 answer
108 views

Should I remove HTTP to HTTPS redirects to fix performance problems reported by Google Pagespeed Insights?

I have created a brand new website in which I publish various computing services I suggest to potential customers. As far as I know, no other website on the World Wide Web links to that website and ...
RAMOS's user avatar
  • 13
1 vote
0 answers
60 views

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 ...
milesmeow's user avatar
  • 689
2 votes
1 answer
103 views

Core Web Vitals (CLS and LCP) errors for a client-rendered Single Page Application (built with React + Firebase)

I have a SPA (single page website) build with React + Firebase and I've been getting these Core Web Vitals errors (see images below). My website is loading normally both on Desktop and Mobile. And I ...
cbdeveloper's user avatar
0 votes
1 answer
56 views

Will removing a HTML section block from my all website pages, affects SEO and my website rank?

So I have a hidden HTML section block that is heavy and requires multiple HTTP requests, which slowing my website page speed load. So I am trying to implement a lazyloading methodology for this ...
Ahmed Moayad AlMoghrabi's user avatar
1 vote
1 answer
27 views

Could a slow website cause visitors from a Facebook ads campaign to bounce?

I have a website with traffic problems. The web site sells a product in Spanish. I recently created a Facebook ads campaign, and it got 96 visits. But Google Analytics only registered 9 visits. I ...
Superpapa's user avatar
1 vote
1 answer
192 views

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 ...
humbleasker's user avatar
5 votes
2 answers
1k views

Does content below the fold affect CLS (cumulative layout shift) score?

From what I've read on CLS it's worked out with the following formula (essentially stuff in the viewport): area of impact region / area of viewport = impact fraction max move distance / viewport ...
AGrush's user avatar
  • 151
1 vote
1 answer
37 views

Prerendering vs. loadtime optimization

While loadtime optimization we turn many adjusting screws, which all have different efficiency and need different afforts. Is it not better to prerender all, or most important, pages and to guarantee, ...
Evgeniy's user avatar
  • 10.1k
4 votes
1 answer
220 views

Use A.jpg if you have it in cache, otherwise use B.jpg?

Let's say I have one page big.html that uses <img alt="big image" src="big.jpg" width="300" height="300" /> where big.jpg is indeed an image of 300 by ...
Hagen von Eitzen's user avatar
1 vote
1 answer
418 views

Website seems idle before loading content [closed]

When we navigate to our Wordpress website, it can sometimes remain idle for 3 to 10 seconds before appearing to load content. This can happen at random times. We have observed it happening on multiple ...
xandi's user avatar
  • 11
0 votes
1 answer
22 views

web hosting metrics

I've started a new role overseeing an ad hoc web hosting division. My boss has asked me to find some metrics he can use to ensure I'm on track ensuring the hosting services are run okay. Can you ...
Steve Doig's user avatar
1 vote
2 answers
649 views

Site speed using web fonts - Self-hosted vs Google Fonts etc

Whilst looking for the right solution for me, I have been looking at the question here Using fonts on websites: Webfonts vs downloaded fonts, and one of the answerers states: The information given to ...
Chris Rogers's user avatar
2 votes
1 answer
253 views

Can I rely on Google Lighthouse reports (especially for mobile sites)?

We have started to use Lighthouse to track the improvements we make to our sites. While this seems to work quite well for desktop sites, i.e. we see the values improve over time and as we make changes,...
jfix's user avatar
  • 185
1 vote
1 answer
754 views

Adsense TOS regarding preconnecting origins

Is it against adsense TOS if I preconnect origins like pagead2.googlesyndication.com, googleads.g.doubleclick.net, tpc.googlesyndication.com and others that are commonly used by adsense? The ...
Kannan's user avatar
  • 2,343
2 votes
3 answers
64 views

Would it introduce lag and bad user experience to host a website with two hosting companies?

I'm developing a website for a customer that has two companies, but the two are closely related. The customer wants two separate sites that look and function as one site as far as users are concerned. ...
Marilyn's user avatar
  • 21
2 votes
1 answer
48 views

PageSpeed is A, 91% but Fully Load Time is 4.8 Seconds

As my title suggests there is, to me, a discrepancy with the A Rating I received. My site using GMetrix ranks very high but the "Page Load" seems very slow. Why isn't that bringing down my ...
Henry's user avatar
  • 415
2 votes
0 answers
32 views

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 ...
Trebor's user avatar
  • 3,270
2 votes
0 answers
203 views

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 ...
notthehoff's user avatar
1 vote
0 answers
437 views

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 ...
Trebor's user avatar
  • 3,270
1 vote
1 answer
37 views

What is 'Research Online' as displayed in Chrome Dev Tools Lighthouse?

When I run a Lighthouse performance audit on our site, one of the 'Opportunities' it flags is to 'Reduce the impact of third-party code'. It lists all the third-party code used by our site, however ...
Undistraction's user avatar
1 vote
2 answers
358 views

Why adding facebook pixel code reduces the score on gtmetrix?

My score website on gtmetrix is A. When I add facebook pixel code, the scrore is B Look at this : How can I solve this problem? I want to add the Facebook pixel code on my website, but I don't want ...
Success Man's user avatar
3 votes
2 answers
227 views

Why does Google, in it's Page Insights tool, advise to use WebP images which don't work in all browsers?

I recently swapped all of the images on my web with WebP compressed images and the Page Insights score got as high as 97. However, I found out my page doesn't work on IE, Safari and Firefox (all other ...
HajdaCZ's user avatar
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