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# Instrumenting requests with Active Support
FaradayMiddleware::Instrumentation uses Active Support to instrument
requests. It records information about each request and time spent
performing it.
```rb
conn.use :instrumentation
```
The default key under which all requests are instrumented is
"request.faraday". You can subscribe to these events and log them
accordingly:
```rb
ActiveSupport::Notifications.subscribe('request.faraday') do |name, start_time, end_time, _, env|
url = env[:url]
http_method = env[:method].to_s.upcase
duration = end_time - start_time
$stderr.puts '[%s] %s %s (%.3f s)' % [url.host, http_method, url.request_uri, duration]
end
```
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