972 ms in total
14 ms
641 ms
317 ms
Visit ocw.mit.edu now to see the best up-to-date Ocw MIT content for United States and also check out these interesting facts you probably never knew about ocw.mit.edu
MIT OpenCourseWare is a web based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity
Visit ocw.mit.eduWe analyzed Ocw.mit.edu page load time and found that the first response time was 14 ms and then it took 958 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.
ocw.mit.edu performance score
name
value
score
weighting
Value2.3 s
74/100
10%
Value10.0 s
0/100
25%
Value4.1 s
79/100
10%
Value400 ms
68/100
30%
Value0.444
21/100
15%
Value9.8 s
28/100
10%
14 ms
9 ms
9 ms
13 ms
14 ms
Our browser made a total of 115 requests to load all elements on the main page. We found that 76% of them (87 requests) were addressed to the original Ocw.mit.edu, 4% (5 requests) were made to Google.com and 3% (4 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (151 ms) belongs to the original domain Ocw.mit.edu.
Page size can be reduced by 742.1 kB (29%)
2.6 MB
1.9 MB
In fact, the total size of Ocw.mit.edu main page is 2.6 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 1.7 MB which makes up the majority of the site volume.
Potential reduce by 54.7 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 10.0 kB, which is 15% 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 54.7 kB or 80% of the original size.
Potential reduce by 75.5 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. Ocw MIT images are well optimized though.
Potential reduce by 551.7 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 551.7 kB or 73% of the original size.
Potential reduce by 60.1 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. Ocw.mit.edu needs all CSS files to be minified and compressed as it can save up to 60.1 kB or 83% of the original size.
Number of requests can be reduced by 51 (45%)
113
62
The browser has sent 113 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ocw MIT. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 29 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.
index.htm
14 ms
grid.css
9 ms
base.css
9 ms
menu.css
13 ms
jquery.bubblepopup.css
14 ms
global.css
14 ms
anythingslider.css
19 ms
sitehome.css
17 ms
jquery.js
18 ms
jwplayer.js
35 ms
ocw-media-utils.js
32 ms
ocw.js
43 ms
webtrends.load.js
47 ms
googleanalytics.js
47 ms
jquery.bubblepopup.min.js
44 ms
jquery.anythingslider.js
51 ms
jquery-div-toggle.js
53 ms
bubble-popup.js
53 ms
jsapi
80 ms
ocw_rss_news.js
50 ms
google_service.js
79 ms
webtrends.min.js
42 ms
analytics.js
43 ms
fbevents.js
86 ms
gpt.js
32 ms
quant.js
32 ms
bg_top.png
65 ms
ocw_mast.png
76 ms
bg_social2.png
66 ms
news-subscibe_bg.png
18 ms
trans.gif
17 ms
icon_gp.png
18 ms
icon_pin.png
18 ms
icon_fb.png
19 ms
icon_tw.png
20 ms
top-nav_home.png
21 ms
nav_arrow.png
22 ms
bg_mega-courses.png
22 ms
button_search.png
21 ms
top-image_without-text.jpg
65 ms
logo_midsize.png
23 ms
feature-curated.jpg
63 ms
feature-about-get-started-dome.jpg
65 ms
feature-hfhs-edu-b.jpg
75 ms
feature-scholar.jpg
73 ms
feature-mitx-a.jpg
67 ms
mitx-logo-white.png
67 ms
feature-mitx-b.jpg
69 ms
feature-odl-a.jpg
71 ms
bg_center.png
67 ms
bg_support.png
71 ms
coro_prev.png
72 ms
21g-107f14-th.jpg
73 ms
15-025s15-th.jpg
72 ms
8-591jf14-th.jpg
78 ms
21a-445js15-th.jpg
76 ms
res-8-005f12-th.jpg
75 ms
14-27f14-th.jpg
74 ms
res-2-005-th.jpg
75 ms
4-s33s15-th.jpg
77 ms
1-020s08-th.jpg
76 ms
62 ms
3534.js
56 ms
CMS-701s15-th.jpg
68 ms
18-443s15-th.jpg
67 ms
ES-333s15-th.jpg
67 ms
21m-235f13-th.jpg
67 ms
22-s902iap15-th.jpg
66 ms
11-127js15-th.jpg
67 ms
2-25f13-th.jpg
65 ms
coro_next.png
67 ms
strang-blue_th.jpg
64 ms
button_learn.png
67 ms
cuthbert_th.png
65 ms
wtid.js
62 ms
pubads_impl_81.js
55 ms
pixel;r=674054292;a=p-H4_RgmfqHMS3m;labels=_fp.event.__index_htm;fpan=1;fpa=P0-1045125515-1456762367173;ns=0;ce=1;cm=;je=0;sr=1024x768x32;enc=n;dst=0;et=1456762367173;tzo=-180;ref=;url=http%3A%2F%2Focw.mit.edu%2Findex.htm;ogl=
59 ms
linkid.js
55 ms
eric_klopfer-th.jpg
63 ms
button_get-started.png
62 ms
logo_sapient.png
61 ms
logo_mit.png
62 ms
logo_odl.png
62 ms
logo_oec.png
60 ms
cc_by-nc-sa.png
68 ms
default+en.css
57 ms
default+en.I.js
60 ms
TitilliumText22L005-webfont.woff
48 ms
100 ms
container.html
37 ms
collect
29 ms
collect
26 ms
86 ms
google_ads.js
16 ms
dcs.gif
6 ms
collect
59 ms
ads
55 ms
ChemLab_300x250_series.jpg
151 ms
bg_bottom.png
146 ms
osd.js
20 ms
ads
128 ms
s
134 ms
default.png
41 ms
2012_hp_donor_martin_u.jpg
45 ms
button_donate.png
41 ms
u
88 ms
logo_mathworks.png
11 ms
logo_lockheed.png
13 ms
logo_accenture.png
12 ms
logo_abinitio.png
14 ms
logo_dow.png
14 ms
logo_telmex.png
14 ms
TitilliumText22L003-webfont.woff
13 ms
TitilliumText22L002-webfont.woff
12 ms
Gfeeds
18 ms
ocw.mit.edu accessibility score
ocw.mit.edu best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
ocw.mit.edu SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ocw.mit.edu can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Ocw.mit.edu main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
ocw.mit.edu
Open Graph description is not detected on the main page of Ocw MIT. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: