(a) It would be a nice courtesy if you could lay out the code so that we can
read it.
(b) What XSLT processor are you using?
(c) The most obvious inefficiency is here:
expand="{$abbreviations[.=$abbr]/following-sibling::expanded}"
This would benefit from use of keys.
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: Jeff Sese [mailto:jsese(_at_)asiatype(_dot_)com]
Sent: 28 November 2006 01:41
To: Xsl-List
Subject: [xsl] Stylesheet Optimization -- How to Make It Faster
I have a stylesheet that puts mark-up to text nodes that
matches an abbreviation in a reference xml file. Its working
nicely but the processing time is very slow... i'm guessing
because its processing text nodes. A 800kb file takes me
about 25 mins to process and i have around 800 file to
process (varying file sizes, some are relatively small and
some are fairly large). Is there any way to optimize my
stylesheet so that it can process the files faster?
here is my stylesheet:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:ati="http://www.asiatype.com/xslt-functions"
exclude-result-prefixes="xs ati">
<xsl:output method="xml" version="1.0" encoding="UTF-8"/>
<xsl:variable name="abbreviations" as="element()+"
select="document('publishers_data.xml')/root/publisher/abbrev"/>
<xsl:template match="/">
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="text()[ancestor::ab and
not(ancestor::note[(_at_)id and @n and @lang])]"> <xsl:variable
name="str" as="xs:string" select="."/> <xsl:choose> <xsl:when
test="exists($abbreviations[matches($str,concat('(^|\W)(',ati:
escape(.),')($|\W)'))])">
<xsl:variable name="search-str" as="xs:string+"
select="$abbreviations[matches($str,concat('(^|\W)(',ati:escap
e(.),')($|\W)'))]"/>
<xsl:variable name="replace" as="element()*"> <xsl:for-each
select="$search-str"> <xsl:variable name="abbr"
as="xs:string" select="."/> <abbr type="title"
expand="{$abbreviations[.=$abbr]/following-sibling::expanded}"
<xsl:value-of
select="$abbr"/></abbr>
</xsl:for-each>
</xsl:variable>
<xsl:sequence select="ati:replace-with-nodes($str,
$search-str, $replace)"/> </xsl:when> <xsl:otherwise>
<xsl:value-of select="$str"/> </xsl:otherwise> </xsl:choose>
</xsl:template> <xsl:template
match="@*|element()|comment()|processing-instruction()"
mode="#all">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/> </xsl:copy>
</xsl:template> <xsl:function name="ati:replace-with-nodes"
as="node()+"> <xsl:param name="input" as="xs:string"/>
<xsl:param name="words-to-replace" as="xs:string*"/>
<xsl:param name="replacement" as="node()*"/> <xsl:variable
name="regex" select="string-join(for $w in $words-to-replace
return concat('(', ati:escape($w), ')'),'|')"/>
<xsl:analyze-string select="$input" regex="{$regex}">
<xsl:matching-substring> <xsl:variable name="i"
as="xs:integer" select="(1 to
count($words-to-replace))[regex-group(.)]"/>
<xsl:sequence select="$replacement[$i]"/>
</xsl:matching-substring> <xsl:non-matching-substring>
<xsl:value-of select="."/> </xsl:non-matching-substring>
</xsl:analyze-string> </xsl:function> <xsl:function
name="ati:escape"> <xsl:param name="s" as="xs:string"/>
<xsl:sequence
select="replace($s,'[\\\|\.\-\^\?\*\+\(\)\{\}\[\]\$]','\\$0')"/>
</xsl:function>
</xsl:stylesheet>
heres a short version of the publishers_data.xml:
<root>
<publisher>
<abbrev>Inschriften von Priene</abbrev>
<expanded>Inschriften von Priene</expanded> </publisher>
<publisher> <abbrev>P. Mil. Congr. XVIII</abbrev>
<expanded>Papiri documentari dell'UniversitàCattolica di
Milano</expanded> </publisher> <publisher> <abbrev>P. Jud.
Des. Misc.</abbrev> <expanded>Discoveries in the Judean
Desert XXXVIII</expanded> </publisher>
<!-- more publishers here -->
</root>
heres a snippet of the source xml:
<!-- preceding::node() of ab -->
<ab lang="grk" n="1">
<foreign lang="grk">· γέγονε κατὰ τοὺς Δαρείου</foreign>
<note place="margin">a c</note> <lb n="5"/> <foreign
lang="grk">χρόνους τοῦ μετὰ Καμβύσην βασιλεύσαντος, ὅτε καὶ
Διονύσιος ἦν ὁ Μιλήσιος</foreign> <lb/>(III), <foreign
lang="grk">ἐπὶ τῆς ξ¯ε¯ ὀλυμπιάδος</foreign> (520/16)<foreign
lang="grk">· ἱστοριογράφος. ῾Ηρόδοτος δὲ ὁ ῾Αλι-</foreign>
<note place="margin">v</note> <lb/> <foreign
lang="grk">καρνασεὺς ὠφέληται τούτου, νεώτερος ὤν. καὶ ἦν
ἀκουστὴς Πρωταγόρου</foreign> <note id="n7" n="7" lang="ger">
<foreign lang="grk">ὤν· γέγονε γὰρ μετ᾽ αὐτόν</foreign>
A</note> <lb/> <foreign lang="grk">ὁ ῾Εκαταῖος. πρῶτος δὲ
ἱστορίαν πεζῶς ἐξήνεγκε, συγγραφὴν δὲ Φερεκύδης</foreign>
<note id="n8—9" n="8—9" lang="ger"> <foreign
lang="grk">πρῶτος—νοθεύεται</foreign> wiederholt s. <foreign
lang="grk">ὶστορῆσαι</foreign>, s. <foreign
lang="grk">συγγραφεῖς</foreign>.</note>
<lb/>(I 3). <foreign lang="grk">τὰ γὰρ ᾽Ακουσιλάου</foreign>
(<link type="boj" targets="a002" n="BOJTEXT002_T_7">2 T
7</link>) <foreign lang="grk">νοθεύεται.</foreign> <note
id="n9" n="9" lang="ger"> <foreign
lang="grk">᾽Ακουσιλάου</foreign> Vossius <foreign
lang="grk">᾽Αγησιλάου</foreign> Suid</note> </ab>
<!-- following::node() of ab -->
all: ab nodes appear in the same level (same depth) though out.
Any suggestions are welcome.
Thanks,
--
Jeff
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