在Ruby on Rails上输出脚本执行时间？

Question

is there a way to output the execution time on the screen? For example, in my Rails application if I call a controller from the index controller, I'd like to have the time it took to query the data displayed on the bottom of the page.

Thanks!

Answer 1

The Railscasts episode on Rack (ASCII version here ) shows how to calculate the time elapsed, but it shows it as an HTML comment at the top of the response body.

My approach would then be to put a certain token in my application layout (for example, <!-- REQUEST TIME --> ) and then perform a gsub over the response body replacing that string with the request time, calculated as in the previous links.