[tbnl-devel] TBNL survey / re-org

[Edi Weitz]

[Cc to mailing list]

On Sat, 09 Sep 2006 13:27:39 +0530, quasi <quasilists at gmail.com> wrote:

> www.cleartrip.com right now runs on CMUCL+TBNL+apache+mod_lisp2.  We
> have load tested it for up to 1000 concurrent users.  It did not
> break or leak.  The performance was purely a factor of the
> computational complexity of the page being displayed.  For the front
> page, which uses HTML_TEMPLATE, apache serving SSI was only slightly
> faster.  Excellent performance generally

Good... :)

> Unfortunately I could not manage to get SBCL to perform anywhere
> near what CMUCL could.  My shortcomings, mostly, I guess.

You might see the difference between "green" threads (CMUCL) and OS
threads (SBCL).  My guess is that thread creation and/or thread
switching is more expensive on SBCL.  Maybe your tests amplify this
difference?  Have you tried with other Lisps which use native threads?