asciidoctorj-pdf is very slow compared to conversion using fop

asciidoctor / asciidoctorj-pdf

AsciidoctorJ PDF bundles the Asciidoctor PDF RubyGem (asciidoctor-pdf) so it can be loaded into the JVM using JRuby.

Apache License 2.0

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asciidoctorj-pdf is very slow compared to conversion using fop #50

Open david0 opened 3 years ago

david0 commented 3 years ago

First of all, thanks for the great work on asciidoctor(j)(-pdf)!

We are using asciidoctor-pdf to convert our documents, but are not really satisfied with the performance. E.g. converting a 24 Page PDF (2 PNG, 2 SVG, 15 small xmls highlighed via rouge, some tables):

asciidoctorj -> docbook -> fop -> pdf takes around 3 seconds
asciidoctorj-pdf takes 15-20 seconds (The same document with cruby asciidoctor-pdf takes around 5 seconds to convert)

Is there anyway to improve the performance?

david0 commented 3 years ago

Any idea why its so much slower? I really prefer asciidoctor-pdf, but we now have documents that take 10min to render...

robertpanzer commented 3 years ago

I guess an difference of 10s between asciidoctor-pdf and asciidoctorj-pdf can be expected since starting up the VM and the jruby runtime takes a bit of time. Do you also see a big difference between the 2 for your larger documents that take 10 or 20 minutes to convert?

david0 commented 3 years ago

The numbers are for a running JVM (GUI application). The 10min are from my collegues PC (windows..). I tried the same document on my MacBook:

asciidoctorj -> docbook -> fop: 45s
asciidoctorj-pdf: 130s
asciidoctor-pdf: 35s

mojavelinux commented 2 years ago

I've seen several reports of AsciidoctorJ PDF being much slower on Windows (particularly from GUI applications). This very likely stems from an issue in JRuby, but one we don't yet understand. It's unlikely that it has anything to do with Asciidoctor itself.