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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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 ...
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How to properly organize element's css [migrated]

I have been in contact with the pre-processor SASS for a year and a half now and it's nice to be able to use @extend and @mixins, but a case for using these two has come to my mind and a doubt just ...
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3 votes
1 answer
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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. ...
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1 vote
1 answer
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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:...
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1 vote
1 answer
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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 ...
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3 votes
2 answers
34 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 ...
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2 votes
1 answer
287 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 ...
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3 votes
1 answer
35 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="//...
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  • 423
3 votes
1 answer
96 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 ...
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13 votes
2 answers
7k 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 ...
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4 votes
1 answer
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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 ...
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3 votes
1 answer
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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 ...
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  • 133
4 votes
1 answer
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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 ...
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1 vote
2 answers
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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 ...
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2 votes
3 answers
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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 ...
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3 votes
1 answer
227 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 ...
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1 vote
1 answer
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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 ...
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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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  • 679
2 votes
1 answer
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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 ...
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0 votes
1 answer
34 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 ...
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1 vote
1 answer
26 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 ...
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1 vote
1 answer
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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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3 votes
2 answers
475 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 ...
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  • 131
1 vote
1 answer
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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, ...
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4 votes
1 answer
175 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 ...
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1 vote
1 answer
112 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 ...
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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 ...
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1 vote
2 answers
207 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 ...
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2 votes
1 answer
104 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,...
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  • 133
1 vote
1 answer
271 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 ...
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2 votes
3 answers
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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. ...
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2 votes
1 answer
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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 ...
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  • 325
2 votes
0 answers
30 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 ...
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  • 2,826
2 votes
0 answers
185 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 ...
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1 vote
0 answers
364 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 ...
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1 vote
1 answer
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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 ...
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1 vote
2 answers
200 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 ...
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2 votes
2 answers
44 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 ...
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1 answer
33 views

Speeding up loading time of large html file [closed]

I am hosting a static web page, which you can visit at nswcorona.imfast.io. It is a very large index.html file with many elements (displaying geo-data), and takes about 10-15 seconds to load. I am new ...
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1 vote
1 answer
42 views

Performance: 10.000 files in one folder vs. 10.000 files in several folders

On my webspace I have a single folder with 10.0000 images. Is there any difference in performance if I organize them in subfolders? So instead of one folder /images I will have 1.000 folders /images/...
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1 vote
0 answers
61 views

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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1 vote
1 answer
38 views

Not Hiding but REMOVING content for mobile

I understand using media queries and display:none to hide content for mobile. The problem is that the content still downloads. I found this older post that has a similar issue, but hoping for more ...
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  • 531
1 vote
1 answer
315 views

How to use Lighthouse scoring Guide for Accessibility Audit?

I am working on scoring improvement on Accessibility Audit in Lighthouse. My client's site has an accessibility score of 60 and they aim to get it 90+. I performed the Audit using Google Lighthouse ...
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1 vote
2 answers
90 views

What is "ineedthispage"? Where is it coming from? It is killing the server

I am seeing the following in my "access_log": ip.address.output.here - - [12/Dec/2019:15:17:07 +0000] "GET /pathto/article/15104133/?ineedthispage=yes&ineedthispage=yes&ineedthispage=yes&...
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6 votes
3 answers
85 views

How can I determine if my site speed is affecting my conversions?

I need to convince my team that our load times are way too high. Load times for the /cart is around 10 seconds and load times for individual pages are around 6 seconds. I've seen all the studies about ...
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  • 93
1 vote
0 answers
19 views

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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2 votes
2 answers
214 views

Do VPSs guarantee resources (CPU, memory) ? Or are they like a shared host (in terms of resources) but you can also manage your own site?

Shared hosts usually don't guarantee resources, they just say unlimited bandwith and things like that and the performance is best effort. Is it different with a VPS? For example, it says 1 vCores, ...
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  • 498
1 vote
0 answers
39 views

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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  • 199
1 vote
1 answer
37 views

Using the clicks/impressions list from Google Search Console

Google Search Console → Performance → Queries shows these in the clicks/impressions list for my site: non A Cs 2,066 7,181 non-A Cs 679 2,410 non-A C ...
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1 vote
1 answer
323 views

How can I optimize Google Analytics for GTmetrix?

I'm optimizing my website using GTmetrix and I've got good grades, but it's still not perfect. Look at this image for PageSpeed: And this one for YSlow: The picture shows that my value is not ...
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