> -----Original Message----- > From: Greg Matheson [mailto:[EMAIL PROTECTED] > Sent: Monday, May 02, 2005 5:47 PM > To: perl-unicode@perl.org > Subject: Re: utf8::SWASHNEW > > On Mon, 02 May 2005, Christopher Fry wrote: > > > One of the things we gathered from our profiling was that more of the > SWASH* > > activity in our apps was happening around regexes. We took a closer look > > and, for the regexes that could never have unicode values (e.g. for > internal > > URL checking), we just scoped them and did a "use bytes" within that > scope. > > It helped, but not to the degree that we thought it would. > > > Turns out the act of profiling the code actually exacerbated the > frequency > > of these SWASH* functions. Instrumenting suspect functions outside of > > profiling demonstrated that. > > How did you show that? Would running code in the debugger also have an > effect? Here is the profile for Kwiki's index.cgi below. > 30 percent of the time is in utf8::SWASHNEW.
We turned off the profiler and ran the same code test path but with some print STDERR stuck in the actual SWASH function. Then we compared the counts of those prints vs what the profiler was telling us and saw a difference of 2-3 orders of magnitude. > > > > -----Original Message----- > > > From: Rafael Garcia-Suarez [mailto:[EMAIL PROTECTED] > > > Sent: Friday, April 29, 2005 8:58 AM > > > To: perl-unicode@perl.org > > > Subject: Re: utf8::SWASHNEW > > > > Eric Cholet wrote in perl.unicode : > > > > I just did a profiling on one of my programs, and it turns out it > > > > spends most of its time in utf8::SWASHNEW. In second place is one of > my > > > > own functions, and in third place comes utf8::SWASHGET. What do > > > > SWASHNEW and SWASHGET do ? (in layman's terms-- I browsed the source > > > > but it gave me a headache). Is this a price to pay when using Perl > > > > unicode strings? > > > > They're used to load and initialise the swatchs, ie. internal hashes > > > that contain unicode properties (sets of unicode chars, e.g. > > > alphabetics, etc). > > > > So, they're typically called rarely. Can you post an example of code > > > that reproduces the problem ? > > Here's no code, but running Kwiki's index.cgi from the command > line with perl -d:DProf index.cgi, produces this profile: > > %Time ExclSec CumulS #Calls sec/call Csec/c Name > 30.4 1.178 0.000 98 0.0120 0.0000 utf8::SWASHNEW > 4.80 0.186 0.329 106 0.0018 0.0031 Spiffy::import > 4.54 0.176 1.541 3103 0.0001 0.0005 Spiffy::__ANON__ > 3.72 0.144 1.517 19 0.0076 0.0798 Spoon::Hub::load_class > 3.69 0.143 0.143 2743 0.0001 0.0001 overload::mycan > 3.48 0.135 0.291 143 0.0009 0.0020 Spiffy::field > 3.20 0.124 0.113 436 0.0003 0.0003 Spiffy::parse_arguments > 3.10 0.120 0.168 8 0.0149 0.0210 Template::Config::load > 3.07 0.119 0.332 10 0.0119 0.0332 Spoon::Base::BEGIN > 2.94 0.114 0.303 236 0.0005 0.0013 Carp::caller_info > 2.71 0.105 0.105 4374 0.0000 0.0000 > Filter::Util::Call::filter_read > 2.32 0.090 0.090 8 0.0112 0.0112 CGI::_compile > 2.04 0.079 0.174 10 0.0079 0.0174 Template::BEGIN > 1.94 0.075 1.280 332 0.0002 0.0039 > Spoon::Formatter::Unit::match_phra > se > 1.81 0.070 0.089 4 0.0175 0.0223 Spoon::Cookie::BEGIN > > 30 percent of the time in utf8::SWASHNEW! > > -- > Greg Matheson, Taiwan
