Scala 2016
Sun 30 - Mon 31 October 2016 Amsterdam, Netherlands
co-located with SPLASH 2016
Sun 30 Oct 2016 09:00 - 10:00 at Matterhorn 2 - Keynote 1

Traditionally, programming languages have been islands, each disconnected from the rest. Running multiple languages on a single VM (e.g. the JVM) allows languages to communicate a little more easily, but at the price of performance: no matter how clever the VM, some languages run slowly. Even when all languages on a VM run acceptably fast, the mechanisms for communication are usually crude, normally due to performance concerns.

In this talk I will show how languages can be composed in a way that reflects the needs of programmers, and that human-orientated design decisions can be made to run sufficiently fast. Using the Eco editor, users can write source files that contain fragments of multiple languages. Multi-language programs are then run on composed meta-tracing interpreters that JIT compile across language implementations – despite not having a common VM. I will show that the performance of the resulting systems is more than good enough to be usable, and that it opens up new possibilities for language design and use.

Joint work with Edd Barrett, Carl Friedrich Bolz, Lukas Diekmann, Sarah Mount, and Jasper Schulz. More at

I am a programmer and Reader in Software Development in the Department of Informatics at King’s College London where I lead the Software Development Team. I am an EPSRC Fellow. I co-founded Elbatrop.

Sun 30 Oct

Displayed time zone: Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna change

08:30 - 10:00
Keynote 1Scala at Matterhorn 2
Day opening
Opening - Day 1
Sandro Stucki EPFL, Manohar Jonnalagedda EPFL, Switzerland
Fine-grained language composition without a common VMKeynote
Laurence Tratt King's College London
Media Attached