Asciidoctor.js on Nashorn JDK 9 is considerably slower than Nashorn JDK 8 (original) (raw)

Guillaume Grossetie grossetieg at gmail.com
Wed Mar 18 12:36:33 UTC 2015

Hi Marcus,

Thanks for your reply, I will give it a try and let you know.

Guillaume.

2015-03-16 13:59 GMT+01:00 Marcus Lagergren <marcus.lagergren at oracle.com>:

Yes. This probably has to do with optimistic typing being enabled to increase JavaScript runtime performance in 9. We know that 9 is currently slower at startup because we generate more correct code (and throw away too optimistic code that we generate first).

Try running with —optimistic-types=false and see if you get back to 8-like performance and startup. We have plans to cheapen startup time considerably until 9 FC. You can also try using the code caching feature from 8u40: https://blogs.oracle.com/nashorn/entry/improvingnashornstartuptimeusing Regards Marcus > On 03 Jan 2015, at 21:01, Guillaume Grossetie <grossetieg at gmail.com> wrote: > > Hello everyone and happy new year! > > Asciidoctor.js is now running on both JDK 8b19 (build 25.40-b23) and JDK > 9b44 (build 1.9.0-ea-b44). > We noticed that JDK 9 is considerably slower than JDK 8 Nashorn but at the > same time running "basic" Javascript seems faster on JDK 9. > > We have a simple Rake task[1] that execute the same examples with the > latest JDK 8 and JDK 9: > > Result with JDK 8: > > Running Nashorn jjs spec/share/basic.js... OK in 909.052 ms > Running Nashorn jjs spec/share/asciidoctor-convert.js... OK in *9335.534 ms* > Running Nashorn java BasicJavascriptWithNashorn... OK in 927.053 ms > Running Nashorn java AsciidoctorConvertWithNashorn... OK in 8843.506 ms > > So less than a second for basic Javascript and around 10 seconds to convert > AsciiDoc source to HTML5. > > Result with JDK 9: > > Running Nashorn jjs spec/share/basic.js... OK in 860.049 ms > Running Nashorn jjs spec/share/asciidoctor-convert.js... OK in *31253.788 > ms* > Running Nashorn java BasicJavascriptWithNashorn... OK in 833.048 ms > Running Nashorn java AsciidoctorConvertWithNashorn... OK in *30584.749 ms* > > As you can see basic.js runs a little faster but asciidoctor-convert.js is > considerably slower (three times slower ~30 seconds). > > The basic.js[2], asciidoctor-convert.js[3] and asciidoctor-all.js[4] are > available on GitHub. > Asciidoctor.js is generated from Ruby using Opal[5] as a result the > file asciidoctor-all.js > is not easy to read but the entry point is the method $convert[6]. > > Let me know if you need more information. > > Cheers, > Guillaume > > [1] https://github.com/asciidoctor/asciidoctor.js/blob/master/Rakefile#L105 > [2] > https://github.com/asciidoctor/asciidoctor.js/blob/master/spec/share/basic.js > [3] > https://github.com/asciidoctor/asciidoctor.js/blob/master/spec/share/asciidoctor-convert.js > [4] > https://github.com/asciidoctor/asciidoctor.js/blob/master/dist/asciidoctor-all.js > [5] http://opalrb.org/ > [6] > https://github.com/asciidoctor/asciidoctor.js/blob/master/dist/asciidoctor-all.js#L24419

More information about the nashorn-dev mailing list