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How does TWiki know to call a particular plugin - from %VARIABLES% on a page or... ?

-- DavidLeBlanc - 18 Mar 2002

All Plugins are called. The first to process a given variable wins.

-- JohnTalintyre - 18 Mar 2002

Just a thought, but why not have the init routine of a plugin return a list/dictionary of those variables it will process to avoid all that overhead?

Not being a Perl programmer to speak of (I can follow a camel, but not lead it wink ) I would assume one could do something like call (varhandler[varname]) where varhandler is the aforementioned dictionary and this would cause the hanlder that's the value of the key "varname" to be called?

-- DavidLeBlanc - 18 Mar 2002

This adds some complexity to the Plugin API (each plugin must register all the syntax that it handles - in some cases this is not just a variable, e.g. for custom plugins that enhance TWiki syntax, such as one I did to map bug:1234 to a bug tracking link). Also, it's not clear that this will really speed things up. It would be good to do some PerformanceAnalysis on plugins to verify that there really is a significant slowdown here - typically, there is just an s/foo/bar/ for each plugin that detects the text it must handle.

I suspect that we'd get a much bigger speedup from making it easier to get ModPerl and SpeedyCGI working - the latter is suitable for TWikiOnWebHostingSites, as well as corporate intranet servers where you aren't root, since it doesn't require an Apache module.

-- RichardDonkin - 19 Mar 2002

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Topic revision: r5 - 2002-03-21 - DennisDaniels
 
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