C# XSLT Transforming Large XML Files Quickly

Question

I\'m transforming a > 2GB file with a lookup template in the XSLT. I would like this to run faster but can\'t find any low hanging fruit to improve performance. Any help would b

Answer 1

I think you can simplify the XSLT code

using the template

to

with the template being simplified to

I think that for sure is a more concise and XSLT way of expressing the approach, whether it improves performance is something you would have to test.

In general with XSLT to improve performance of cross-references/lookups it is recommended to use a key so you would use

and then use it as

I think that would considerable speed up the lookup in a single transformation, as you combine XmlReader and XSLT to run the XSLT many times on as many elements your XmlReader finds I can't tell whether it helps a lot, you would need to try.

As pointed out in the XSLT 3 suggestion, I would also consider transforming the lookup file first and once to avoid the repetition of all those translate calls to create proper XML element names. Either do that outside of the existing XSLT or do it inside by using a variable and then exsl:node-set to convert the result tree fragment into a variable. But in your case as you run the XSLT repeatedly I think it is probably better to first transform the lookup document outside of the main XSLT, to avoid having to do all those translates again and again.