Re: Template techniques [ newbie alert + long ]
Hi there, On Thu, 8 Jun 2000, Perrin Harkins wrote: use references for passing data. But see "Advanced Perl Programming" pages 9 (Performance Efficiency) and 44 (Using Typeglob Aliases). 73, Ged.
Re: Template techniques [ newbie alert + long ]
On Thu, 8 Jun 2000, Greg Cope wrote: My original question was not related to templates (I'll use embperl for that) Well, I'm confused now. You'll use Embperl for templates but you're not using Embperl for templates? - the area I was trying to explore was how to read a template (all HTML with a few !--TAGS-- in it) and the sub in the new content. Embperl would work fine for that, but it's overkill. Your substitution approach is slower than compiling to perl subs, especially since you have to load the file, but saves lots of memory and is fine for something as simple as this. Has anyone any suggestions as to speeding this up - yet keeping it simple - I have played with referances to avoid all the variable copying etc . ? Caching templates in memory would certainly help, but you'll eat up a chunk of RAM. - Perrin
Re: Template techniques [ newbie alert + long ]
Perrin Harkins wrote: On Thu, 8 Jun 2000, Greg Cope wrote: My original question was not related to templates (I'll use embperl for that) Well, I'm confused now. You'll use Embperl for templates but you're not using Embperl for templates? I use Embperl when I want a templating system - but not when using HTML templates (wrong use of names on my part) - I am refering to a template in this case as an HTML file with a few special tags. - the area I was trying to explore was how to read a template (all HTML with a few !--TAGS-- in it) and the sub in the new content. Embperl would work fine for that, but it's overkill. Your substitution approach is slower than compiling to perl subs, especially since you have to load the file, but saves lots of memory and is fine for something as simple as this. Can you enlighten me into the compiling to perl subs ? The file gets loaded once into shared memory - most (stripped) HTML files are only a few 10's of K. Also the file gets loaded once at startup - not during the request stage. Has anyone any suggestions as to speeding this up - yet keeping it simple - I have played with referances to avoid all the variable copying etc . ? Caching templates in memory would certainly help, but you'll eat up a chunk of RAM. If the html is usually reasonable in size, and the code I CP'ed strips the template into one long strip with spaces / tabs (designers making things all indented etc ..) at each end of the string - and chomp. Also the templates are modular - in that one template covers main part of the page, and other templates cover the rest. This helps contiunity in HTML design etc .. (i.e only make one changen in one place) Thanks for the input. Greg - Perrin
Re: Template techniques [ newbie alert + long ]
On Thu, 8 Jun 2000, Greg Cope wrote: - the area I was trying to explore was how to read a template (all HTML with a few !--TAGS-- in it) and the sub in the new content. Embperl would work fine for that, but it's overkill. Your substitution approach is slower than compiling to perl subs, especially since you have to load the file, but saves lots of memory and is fine for something as simple as this. Can you enlighten me into the compiling to perl subs ? It's what Matt was talking about. Your program parses the template, generates perl code that produces the correct output, evals the code, and stores the results in a sub reference which you can call whenever you want that template. The first time I ever saw this done was with ePerl, but I don't know if that was really the first. All the embedded perl systems popular around here (Embperl, Apache::ASP, Mason, etc.) use some variation on this technique. I think the world's record for most compact implementation goes to Randal for a small post you can find in the archive here: http:[EMAIL PROTECTED] The file gets loaded once into shared memory - most (stripped) HTML files are only a few 10's of K. Also the file gets loaded once at startup - not during the request stage. You probably won't get much faster than that then, no matter what you do. Just make sure your regexps are fast (maybe use "study"?) and use references for passing data. - Perrin
Re: Template techniques [ newbie alert + long ]
"Perrin" == Perrin Harkins [EMAIL PROTECTED] writes: Perrin I think the world's record for most compact implementation Perrin goes to Randal for a small post you can find in the archive here: Perrin http:[EMAIL PROTECTED] Ahh yes, Apache::Cachet (it's a cache, eh?), mostly proof of concept, aborted when I started using HTML::Mason in a serious way. -- Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095 [EMAIL PROTECTED] URL:http://www.stonehenge.com/merlyn/ Perl/Unix/security consulting, Technical writing, Comedy, etc. etc. See PerlTraining.Stonehenge.com for onsite and open-enrollment Perl training!
