I need to measure loading time of each component of web page ( css, javascripts, ajax request, including each resource with GET and POST methods. This could be done and watched through Chrome's inspect element or httpwatch or other software but I need something which could pass variables to post request using scripts and then could measure everything happening under that request.
The other thing is that I needed to monitor external website, and therefore I dont have control over webpages where I could write my own code around each load, unload call to measure total time consumed on page itself