perf

HTTP response header

Header usage statistics

perf response header information and usage statistics.
Websites using header perf386
Percentage of websites that use perf header<0.1%
Total discovered header values2
Header uses directivesNo
Header values are unique or randomNo
Most popular in the country United States

perf Directives

perf directives value information and usage statistics
DirectiveShareWebsites countUnique Values

perf header usage distribution by website rank



Geographical Distribution

Header usage distribution by websites across the globe.



Websites utilizing perf

List of websites that use perf header
DomainCountryRankContacts
twitter.com United States7
t.co United States209
pbs.twimg.com United States626
help.twitter.com United States880
support.twitter.com United States1,524
mobile.twitter.com United States1,703
See full domain list

Common header values

List of top common perf header values
Header valueValue prevalence
746993596899.48%
76261439280.52%