2.4 Xalan as XSLT processor

I recommend Saxon as XSLT processor, but XSLT 1.0 is a well-defined standard, so there are alternatives. The most serious one is Xalan-C++. If you use the shell script provided with texi2latex, you just have to (un)comment the proper lines to activate Xalan instead of Saxon. However, in my tests Xalan was slightly slower, although it's written in C++. (Saxon is a Java application.)