Saxon » SaxonJS

I just found and started using the Saxon-JS to be able to run Schematron validations on Peppol (Peppol.eu) messages and it works great! I've "pre-compiled" the Schemat's needed into JSON (using schxslt and xslt3) and I am then executing the SaxonJS.transform() on the data.

As these stylesheets are fairly big it takes some time and performance is of key as it is run through a API.

I run the three calls in a Promise.all() and have added timers. From the timers I can see that the function calls happens in parallel but the execution of SaxonJS.transform() seems to be sequential, i.e. when the first SaxonJS.transform() returns the next starts... Is there some "queuing" or sequential code happening in SaxonJS that would prevent running it in parallel?