Access costcoauto.com. New & Used Car Buying Service

name

value

score

weighting

FCP (First Contentful Paint)

Value8.0 s

0/100

10%

LCP (Largest Contentful Paint)

Value14.0 s

0/100

25%

SI (Speed Index)

Value8.0 s

22/100

10%

TBT (Total Blocking Time)

Value950 ms

29/100

30%

CLS (Cumulative Layout Shift)

Value0.162

72/100

15%

TTI (Time to Interactive)

Value15.2 s

7/100

10%

costcoauto.com

340 ms

default.aspx

604 ms

enterzipcode.aspx

236 ms

layout.css

228 ms

urchin.js

80 ms

Our browser made a total of 18 requests to load all elements on the main page. We found that 67% of them (12 requests) were addressed to the original Costcoauto.com, 17% (3 requests) were made to Affinitydg.hs.llnwd.net and 6% (1 request) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (604 ms) belongs to the original domain Costcoauto.com.

Content Size

768.3 kB

After Optimization

260.8 kB

In fact, the total size of Costcoauto.com main page is 768.3 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Javascripts take 466.1 kB which makes up the majority of the site volume.

HTML Optimization

-59%

Potential reduce by 5.0 kB

Original 8.5 kB
After minification 7.6 kB
After compression 3.5 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 928 B, which is 11% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 5.0 kB or 59% of the original size.

Image Optimization

-3%

Potential reduce by 4.9 kB

Original 188.6 kB
After minification 183.6 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Costco Auto images are well optimized though.

JavaScript Optimization

-88%

Potential reduce by 408.0 kB

Original 466.1 kB
After minification 283.3 kB
After compression 58.1 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 408.0 kB or 88% of the original size.

CSS Optimization

-85%

Potential reduce by 89.5 kB

Original 105.1 kB
After minification 78.7 kB
After compression 15.6 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Costcoauto.com needs all CSS files to be minified and compressed as it can save up to 89.5 kB or 85% of the original size.

Requests Now

After Optimization

The browser has sent 15 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Costco Auto. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.