added statsd metrics timing for each request

services/web/app/coffee/infrastructure/Metrics.coffee

@@ -11,6 +11,9 @@ module.exports =
 	inc : (key, sampleRate = 1)->
 		statsd.increment buildKey(key), sampleRate
 
+	timing: (key, timeSpan, sampleRate)->
+		statsd.timing(key, timeSpan, sampleRate)
+
 	Timer : class
 		constructor :(key, sampleRate = 1)->
 			this.start = new Date()

services/web/app/coffee/infrastructure/Monitor/HTTP.coffee

@@ -1,10 +1,19 @@
+settings = require("settings-sharelatex")
 logger = require "logger-sharelatex"
+os = require("os")
+metrics = require("../Metrics")
 
 module.exports.logger = (req, res, next) ->
 	startTime = new Date()
 	end = res.end
 	res.end = () ->
 		end.apply(this, arguments)
+		responseTime = new Date() - startTime
+		routePath = req.route.path.replace(/\//g, '-').slice(1)
+
+		processName = if settings.internal.web.name? then "web-#{settings.internal.web.name}" else "web"
+		key = "#{os.hostname()}.#{processName}.#{routePath}".toLowerCase().trim()
+		metrics.timing(key, responseTime, 0.2)
 		logger.log
 			req:
 				url: req.originalUrl || req.url
@@ -15,7 +24,7 @@ module.exports.logger = (req, res, next) ->
 				"content-length": req.headers["content-length"]
 			res:
 				"content-length": res._headers?["content-length"]
-				"response-time": new Date() - startTime
+				"response-time": responseTime
 			"http request"
 	next()