Table of contents
Detailed Performance Metrics
WebPagetest provides extensive performance metrics, including Time to First Byte (TTFB), Speed Index, and First Contentful Paint, allowing for a deep understanding of website performance.
Real Browsers
Tests are conducted using real browsers, which ensures that the results are closely aligned with real user experiences.
Geolocation Testing
Supports testing from various locations worldwide, which is useful for understanding performance in different markets.
Advanced Testing Options
Offers advanced options such as scripting for complex interactions, multi-step transactions, and authenticating users.
Free and Open Source
WebPagetest is free to use and its code is open-source, allowing for community contributions and customizable implementations.
Video Capture
Provides video capture of the loading process, giving a visual representation of loading performance.
Waterfall Charts
Generates detailed waterfall charts that help identify bottlenecks in resource loading.
Yes, WebPagetest is considered a good tool for evaluating website performance. It is widely used by developers and performance engineers for its accuracy and the depth of information it provides.
We have collected here some useful links to help you find out if WebPagetest is good.
Check the traffic stats of WebPagetest on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of WebPagetest on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of WebPagetest's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of WebPagetest on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about WebPagetest on Reddit. This can help you find out how popualr the product is and what people think about it.
Trust neither. The most optimal option I've found is webpagetest.org Its been quite handy lately. This tool does look interesting. Source: over 2 years ago
Webpagetest.org is another. Pagespeedinsights and lighthouse are great for identifying page load issues to fix, but actual page load times will always vary between the user and your web server. Universal analytics has some page load timings but that's going away soon and nothing afaik is in GA4. I've seen an example of building a page load timer in tag manager and dumping the results into an event. Source: over 2 years ago
So I am working on rebuilding our company's site with a new stack. I am running tests using webpagetest.org, and I am having trouble fully understanding the speed index results as well as the film strip view. The page renders quite fast everywhere I test it. Google Lighthouse shows it in the 90s + for performance score, however when I test the page on webpagetest, I get load times of 77 seconds (NOT MS) which is... Source: over 2 years ago
Webpagetest.org is great, and checking OP's site they have done an incredible job, I don't think I have ever made or seen an Ecom site this slick. Super clean waterfall view. Source: over 2 years ago
Thanks for the recommendation regarding webpagetest.org, another user made a similar recommendation so I will check it out. Source: over 2 years ago
Thank you, I will check out webpagetest.org, you have a point about tag manager too. Source: over 2 years ago
Starting to make a big push for accessibility at my company and was wondering what kind of tools, websites, or services you all use to catch some of the low hanging fruit with automation? I've used sites like webpagetest.org for performance diagnostics, hoping something similar exists in the accessibility space. Thanks for your insights! Source: over 2 years ago
Use webpagetest.org - it will give you great suggestions on what/how to fix and with the paid version let you test out those ideas to guesstimate impact to your site. Pretty solid. Source: over 2 years ago
Lighthouse doesn't provide as much info as webpagetest.org where you can look at the waterfall and find out what's slowing things down. Source: over 2 years ago
I've also got no experience with that webpagetest.org site, but if it's saying that lazyloading hasn't be removed, then you've either removed it from the wrong place, or its referring to something else, or its using a cached version of the page. You should be able to see for yourself if you open the page and use your browsers dev tools to inspect the slideshow and find if the slides have loading="lazy" on them. Source: almost 3 years ago
I'm using Sense theme - I figured out that it can be done in the slideshow.liquid - but no idea how. Removing "loading="lazy" from that file doesn't do anything - tested it with webpagetest.org - no changes between before and after. Source: almost 3 years ago
For webpagetest.org - it's around 3.5s. Source: almost 3 years ago
Test your site using webpagetest.org. Source: almost 3 years ago
I've used GTMetrix and webpagetest.org along with pagespeed insights. Their results align though GTMetrix shows much better score as it's limited for desktop only. Source: almost 3 years ago
I also tested with webpagetest.org by blocking googletagmanager.com and speed is improving. So yes, GTM is causing the delay IMO. I'm looking to optimize it as much as possible. Source: almost 3 years ago
You may take some some on Hetzner and run https://webpagetest.org against it from multiple points of the world and see the differences in TTFB/latency, should be enough for high level estimation. Source: about 3 years ago
To get an accurate picture of the load time for your target market I recommend using https://webpagetest.org. Source: about 3 years ago
Did you try to simulate the user experience from a different country using for example webpagetest.org? Source: about 3 years ago
If you are truly concerned about interactive responsiveness go to webpagetest.org and try a number of common websites you use under Cricket and USM SIM and compare (ideally around the same time). The data there is unparalleled. You can compare first byte and start render times. I would clear out your browser cache between runs. Source: about 3 years ago
I tested on Webpagetest.org and UpCloud came in for 2 seconds faster for Full Content Paint. TTFB was the same. Source: over 3 years ago
We can make a web page test (using a tool like WebPageTest or Google's PageSpeed Insights which is also available as a Lighthouse performance audit in our browsers developer tools) before and after activating performance settings. We should see an improvement, often taking our page from an initial slow score indicated in red to a better score in yellow (or, rarely, especially for minimalist sites avoiding stupid... - Source: dev.to / over 3 years ago
Do you know an article comparing WebPagetest to other products?
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Is WebPagetest good? This is an informative page that will help you find out. Moreover, you can review and discuss WebPagetest here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.
