Use double slash

Using // anywhere inside the match attribute of xsl:template forces a full document scan and should be replaced with a more specific path.

Incorrect:

<xsl:template match="root//item">
  <xsl:value-of select="."/>
</xsl:template>

Correct:

<xsl:template match="item">
  <xsl:value-of select="."/>
</xsl:template>