Thanks for your response, Norman, I wasn't aware of that Rails 3.2.3 issue. I'll wait for the next Haml release!
On Monday, February 18, 2013 10:49:39 AM UTC-5, Norman Clarke wrote: > > On Thu, Feb 14, 2013 at 3:04 PM, Daniel Vandersluis > <reality....@gmail.com<javascript:> > > wrote: > >> Is it just me, or is Haml 4 slower than Haml 3.2? I created a sample haml >> page using html2haml (about 200 lines of haml code), and used the benchmark >> script I found at >> http://www.coffeepowered.net/2011/06/17/making-haml-faster/: > > > TL;DR - you're right. > > Haml 3.1.4 contains an incompatibility with Rails 3.2.3+ whose fix > impacted performance. You can read about this in the commit which > introduced it: > > > https://github.com/haml/haml/commit/cda687aaf3d8f89f9fba28c4bc137640afe98562 > > So ideally you should compare Haml 3.1.8 against 4.0, since those are the > latest versions of each stable release that work with the current version > of Rails. In that comparison Haml 3.1 still comes out slightly ahead, > except on parsing performance (though that's not especially important in > production). > > On 1.9.3 the difference is slight, but unfortunately on JRuby Haml 3 > is surprisingly twice as fast as Haml 4. Here are the results: > > https://gist.github.com/norman/4977796 > > The benchmark source is here: https://github.com/norman/haml-bench > > I'm looking into what caused the performance regression today. Performance > wasn't a focus of the 4.0 release but we obviously didn't intend to > introduce any regressions either. The earlier alphas of Haml 4.0 did in > fact have slightly better performance across the board and I had expected > to maintain that into the release. Mea culpa for not keeping a closer eye > on the benchmarks. > > Akira Matsuda is currently working on improving performance, and you can > see his commits in the master branch right now. We should have a 4.0.x > release out within the next few weeks that will include his improvements, > and I'll keep the list posted regarding the regressions from 3.1 to 4.0. > > Regards, > > Norman > > > -- You received this message because you are subscribed to the Google Groups "Haml" group. To unsubscribe from this group and stop receiving emails from it, send an email to haml+unsubscr...@googlegroups.com. To post to this group, send email to haml@googlegroups.com. Visit this group at http://groups.google.com/group/haml?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
