Problem : XML::Parser slow working on long non-markup sequence of characters...
1. XML file test.xml:
2. Have perl script for parse: test.pl
#!/usr/bin/perl
use XML::Parser;
our $str;
my @arr;
my $file = shift;
my $parser = new XML::Parser::
Handlers =>{
Char => sub {
$str .= $_[1];
# push @arr,$_[1];
}
}
;
$parser->parsefile($file);
2. Run script :
$ time ./test.pl test.xml
35.984u 0.557s 0:41.20 88.6% 10+9137k 0+0io 0pf+0w
3. Now uncomment line with push. Run !
$ time ./test.pl test.xml
0.119u 0.031s 0:00.15 93.3% 10+4276k 0+0io 0pf+0w
First run Time 0:41.20.
Second run time 0:00.15 !!!
Why ? Any ideas ???
perl -V
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=freebsd, osvers=6.1-prerelease, archname=i386-freebsd-64int
uname='freebsd home.zag 6.1-prerelease freebsd 6.1-prerelease #0:
+sun feb 26 13:15:04 msk 2006 root@home.zag:usrobjusrsrcsysmykernel i3
+86 '
config_args='-sde -Dprefix=/usr/local -Darchlib=/usr/local/lib/per
+l5/5.8.8/mach -Dprivlib=/usr/local/lib/perl5/5.8.8 -Dman3dir=/usr/loc
+al/lib/perl5/5.8.8/perl/man/man3 -Dman1dir=/usr/local/man/man1 -Dsite
+arch=/usr/local/lib/perl5/site_perl/5.8.8/mach -Dsitelib=/usr/local/l
+ib/perl5/site_perl/5.8.8 -Dscriptdir=/usr/local/bin -Dsiteman3dir=/us
+r/local/lib/perl5/5.8.8/man/man3 -Dsiteman1dir=/usr/local/man/man1 -U
+i_malloc -Ui_iconv -Uinstallusrbinperl -Dcc=cc -Duseshrplib -Dccflags
+=-DAPPLLIB_EXP="/usr/local/lib/perl5/5.8.8/BSDPAN" -Doptimize=-O2 -pi
+pe -march=pentiumpro -Ud_dosuid -Ui_gdbm -Dusethreads=n -Dusemymalloc
+=y -Duse64bitint'
hint=recommended, useposix=true, d_sigaction=define
usethreads=undef use5005threads=undef useithreads=undef usemultipl
+icity=undef
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=define use64bitall=undef uselongdouble=undef
usemymalloc=y, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-DAPPLLIB_EXP="/usr/local/lib/perl5/5.8.8/BSDPA
+N" -DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -fno-strict-aliasing -pipe -
+Wdeclaration-after-statement -I/usr/local/include',
optimize='-O2 -pipe -march=pentiumpro',
cppflags='-DAPPLLIB_EXP="/usr/local/lib/perl5/5.8.8/BSDPAN" -DHAS_
+FPSETMASK -DHAS_FLOATINGPOINT_H -fno-strict-aliasing -pipe -Wdeclarat
+ion-after-statement -I/usr/local/include'
ccversion='', gccversion='3.4.4 [FreeBSD] 20050518', gccosandvers=
+''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1
+2
ivtype='long long', ivsize=8, nvtype='double', nvsize=8, Off_t='of
+f_t', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -Wl,-E -L/usr/local/lib'
libpth=/usr/lib /usr/local/lib
libs=-lgdbm -lm -lcrypt -lutil
perllibs=-lm -lcrypt -lutil
libc=, so=so, useshrplib=true, libperl=libperl.so
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags=' -Wl,-R
+/usr/local/lib/perl5/5.8.8/mach/CORE'
cccdlflags='-DPIC -fPIC', lddlflags='-shared -L/usr/local/lib'
Characteristics of this binary (from libperl):
Compile-time options: MYMALLOC PERL_MALLOC_WRAP USE_64_BIT_INT
USE_LARGE_FILES USE_PERLIO
Locally applied patches:
defined-or
Built under freebsd
Compiled at Mar 15 2006 23:07:53
%ENV:
@INC:
/usr/local/lib/perl5/5.8.8/BSDPAN
/usr/local/lib/perl5/site_perl/5.8.8/mach
/usr/local/lib/perl5/site_perl/5.8.8
/usr/local/lib/perl5/site_perl/5.8.7
/usr/local/lib/perl5/site_perl/5.8.6
/usr/local/lib/perl5/site_perl/5.8.5
/usr/local/lib/perl5/site_perl/5.8.2
/usr/local/lib/perl5/site_perl/5.8.0
/usr/local/lib/perl5/site_perl/5.005
/usr/local/lib/perl5/site_perl
/usr/local/lib/perl5/5.8.8/mach
/usr/local/lib/perl5/5.8.8
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