If parsing Haml is taking a long time, you're doing something wrong. A Haml template should only be parsed once; then the compiled template should be cached and used for all future generations of the result. The Haml::Engine#def_method method can be used to do this easily: http://haml-lang.com/docs/yardoc/Haml/Engine.html#def_method-instance_method.
To answer your original question, no, there are no plans to switch to a generated parser. The primary reason for this is that Haml parsing shouldn't ever be a bottleneck. The other reason is that Haml is very far from being a regular language, which is what Ragel is designed to parse. In fact, it's also very far from being context-free, which is a more complex class than regular languages. It would take quite a bit of pre-processing trickery to get Haml into a form where a generated parser could parse it, at which point most of the performance gains (that don't matter anyway because parsing shouldn't be a bottleneck) would likely be lost. On Tue, Jan 25, 2011 at 6:02 AM, Bruno Azisaka Maciel <[email protected]>wrote: > Hi, > > is there anyone working on a parser for Haml using Ragel? > I'm working on a project and Haml is our biggest problem right now. Haml > takes around 80% of throughput. A friend of mine told me about a migration > done on Redcloth which changed the old parser to a new one using Ragel. > > Is there a plan to change that parser? > > > best regards, > azisaka > > -- > You received this message because you are subscribed to the Google Groups > "Haml" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected] <haml%[email protected]>. > For more options, visit this group at > http://groups.google.com/group/haml?hl=en. > -- You received this message because you are subscribed to the Google Groups "Haml" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/haml?hl=en.
