# Ajax and performance **URL:** \ **Category:** Rails\ **Created:** [March 15, 2007, 9:30pm UTC](https://www.ruby-forum.com/t/ajax-and-performance/88953 "2007-03-15T21:30:32Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![pypypy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/5daacb/32.png) [@pypypy](https://www.ruby-forum.com/u/pypypy)\ **Post date:** [March 15, 2007, 9:30pm UTC](https://www.ruby-forum.com/t/ajax-and-performance/88953/1 "2007-03-15T21:30:32Z")
Hello, I got this newbye problem : 1 method is very long to process and CPU consuming. So, i want to add a progress bar. But when i call this heavy method, then the entire rails application is frozen until it finished. So the ajax call for progression status does not get any response from the server until the method is finished… I tryed with Webrick and Apache + mod\_scgi with the same result. Is there a way to make it multi thread to process multiple requests in the same time ? Does i have to create a cluster or a kind of ruby worker pool to handle several requests in the same time ? Is there a way to ‘renice’ a method ? Am i missing somethings ? Any ideas is welcome 🙂 Thank you in advance ---
**Author:** ![pypypy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/5daacb/32.png) [@pypypy](https://www.ruby-forum.com/u/pypypy)\ **Post date:** [March 15, 2007, 10:04pm UTC](https://www.ruby-forum.com/t/ajax-and-performance/88953/2 "2007-03-15T22:04:36Z")
Rails is not thread safe so your choices are multiple web server processes or use of something like [http://backgroundrb.rubyforge.org/](http://backgroundrb.rubyforge.org/) Michael ---
**Author:** ![pypypy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/5daacb/32.png) [@pypypy](https://www.ruby-forum.com/u/pypypy)\ **Post date:** [March 16, 2007, 5:03pm UTC](https://www.ruby-forum.com/t/ajax-and-performance/88953/3 "2007-03-16T17:03:53Z")
MichaelLatta wrote: > Rails is not thread safe so your choices are multiple web server > processes or use of something like [http://backgroundrb.rubyforge.org/](http://backgroundrb.rubyforge.org/) > > Michael Thank you Michael, Will Rails be thread safe one day ? This basic feature is really missing to me… py