Take a couple of exciting new JVM languages, add Java itself, sprinkle on a performance test and what do you get?
Some surprising results!
In a test that performed calculations on financial instrument price movements, it was found that Fantom, a language that compiles into Java byte code, was more than twice the speed (x2) of Java itself!
Kotlin, another language that compiles into Java byte code, was much much slower. In fact, it was more than 3 times slower than Fantom, and as you might expect for a derivative language, was also slower than Java.
So how can Fantom, a language based on Java, be faster than Java?
Although Fantom runs on the JVM, all of Fantom's core libraries have been written from scratch. Brian Frank, one of Fantom's creators, comments:
There are definitely some libraries we've optimized the heck out of - especially the sys APIs.
In fact, after inspecting the test code Brian goes on to mention that the Fantom test code is sub-optimal. And that with a couple of minor type changes, it could be even faster!
The test, along with the source code for Fantom, Java and Kotlin, is available on GitHub.
The full results, as reported on the Fantom Discussion Forum, are:
: Time Code Size --------------------------------- Fantom 1.2 secs 105 lines Java 8 2.9 secs 141 lines Kotlin 4.2 secs 130 lines
Read the full discussion on the Fantom Forum under Fantom speed impressive....
And here you can read an official stance on Fantom vs Kotlin (and other JVM langs).
Oh, and by the way...
All the facts presented here are correct. The style however is a bit tongue-in-cheek and an attempt at writing a sensationalist tabloid article. Hope you liked it!
- 9 April 2017 - Added Fanny vs Duke picture.
- 16 Jun 2014 - Original article.