xml - Xslt equals performance improvement -


i want improve performance of xslt 2.0. use saxon-sa 9.0.0.5 xslt processor. of profiling, zeroed bottleneck. here bottleneck piece of code extracted

<xsl:variable name="party" select="/drawdowninventoryandeventnotification/party"/> -- approximately 500 parties

<xsl:apply-templates select="$party[@id = ($abc/@id union $xyz)]"/> -- union producing sequence of 20k items. comparison of 20k items party@id cause performance.

thanks in advance valuable solutions / workarounds.

try define key <xsl:key name="party-by-id" match="/drawdowninventoryandeventnotification/party" use="@id"/>, replace <xsl:apply-templates select="$party[@id = ($abc/@id union $xyz)]"/> <xsl:apply-templates select="key('party-by-id', $abc/@id union $xyz)"/>.


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