Ilya’s post Measuring network performance with Resource Timing API had two pieces of information that surprised me: The Resource Timing API is supported in Chrome, Opera, and IE10+. I knew that each of these browsers had individually added support for Resource Timing, but I had never seen them lis…

Happy to see this. mPulse also includes the timing-allow-origin response on boomerang requests.

Awesome. Hope to see this more popular widget / library providers on this list soon! Quick note: It’ll be interesting to rerun this list on the Dec 15th crawl. Back in November we were still in early stages of rolling out RT support across Google Fonts / Google+ / Google Libraries (CDN). I expect t…

For those having Timing-Allow-Origin header, no one is setting it to anything other than “*” SELECT url, respOtherHeaders, count(*) as num FROM [httparchive:runs.latest_requests] WHERE lower(respOtherHeaders) contains "timing-allow-origin" and not lower(respOtherHeaders) contains "timing-allow-…

[image] stevesoudersorg: lower(respOtherHeaders) contains “timing-allow-origin” Update May 15 2014: In the May 15 crawl there were 1,392,034 responses with Timing-Allow-Origin out of 27655500 total requests (5%). A nice increase!

[image] stevesoudersorg: lower(respOtherHeaders) contains “timing-allow-origin” Update - In the Jan 01 2015 crawl, there were 44,981,766 requests with 2,902,254 set with “timing-allow-origin” - 6.5%

February 15 crawl: 6,942,158 out of 50,088,983 requests (13.86%)

Love to see this periodically updated with the latest data. I put together a query to generate a timeseries: #standardSQL SELECT REPLACE(SUBSTR(_TABLE_SUFFIX, 0, 10), '_', '-') AS date, SUM(IF(LOWER(respOtherHeaders) LIKE "%timing-allow-origin%", 1, 0)) / COUNT(0) AS pctAllowTiming FROM `htt…

Revisiting this thread. I’m curious not just how many response headers include TAO but specifically whether resources are Resource Timing enabled, meaning that it is either a same-origin resource or its TAO value is permissive (* or the same origin). Here’s an example of a query to get the latest d…

@rviscomi - What will be useful here is to report top third parties which are missing TAO ? I guess there will be some big ones in this list (e.g. Pinterest) and publishing the list of top third parties missing TAO can be a good addition for third parties chapter in Web Almanac 2020.

Yes, thats a good suggestion @rockeynebhwani ! Could you note that in the 3P chapter issue and/or doc ?

How many and which resources have Timing-Allow-Origin for Resource Timing?

Analysis

elbpdx January 14, 2015, 1:50am 6

Update - In the Jan 01 2015 crawl, there were 44,981,766 requests with 2,902,254 set with “timing-allow-origin” - 6.5%

Topic		Replies	Views
Which sites enabled Resource Timing? Analysis	3	1546	June 27, 2013
How Is Server-Timing used on the web? Analysis	17	5257	August 3, 2017
What is the distribution of 1st party vs 3rd party resources? Analysis	16	21328	May 6, 2019
How many resources have X Frame Options, Strict Transport Security, or Content Security Policy headers for web app security? Analysis	6	7097	November 16, 2017
Ads impact (bytes transferred, execution time) on the web over time Analysis	9	1599	April 9, 2019

How many and which resources have Timing-Allow-Origin for Resource Timing?

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