HTTP response header

To create a middleware that records the response time for requests in HTTP servers. The "response time" is defined here as the elapsed time from when a request enters this middleware to when the headers are written out to the client.

Header usage statistics

X-Response-Time response header information and usage statistics.

Websites using header X-Response-Time 14,111
Percentage of websites that use X-Response-Time header <0.1%
Total discovered header values 7,368
Header uses directives No
Header values are unique or random No
Most popular in the country United States of America

Distribution by websites popularity

X-Response-Time detection in the top websites by popularity

Top 10k sites 46 websites
Top 100k sites 159 websites
Top 1m sites 564 websites

Websites utilizing X-Response-Time

List of websites that use X-Response-Time header

Domain Country Rank Contacts
twitter.com United States of America 7
www.jsdelivr.com United Kingdom 151
data.jsdelivr.com United Kingdom 152
www.tumblr.com United States of America 207
t.co United States of America 209
myspace.com United States of America 589
See full domain list
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Geographical Distribution

Header usage distribution by websites across the globe.

Common header values

List of top common X-Response-Time header values

Header value Value prevalence
1ms 2.24%
0ms 2.07%
3ms 1.63%
2ms 1.50%
5 1.19%
4 1.12%
4ms 1.06%
0.000 1.05%
3 0.99%
5ms 0.88%
6ms 0.74%
6 0.70%
7ms 0.62%
8ms 0.58%
70ms 0.57%
69ms 0.55%
68ms 0.52%
64ms 0.51%
0 0.50%
65ms 0.49%