One of the hard problems in language implementation research is benchmarking. Some people argue, we should benchmark only applications that actually matter to people. Though, this has various issues. Often, such applications are embedded in larger systems, and it’s hard to isolate the relevant parts. In many cases, these applications can also not be made available to other researchers. And, of course, things change over time, which means maintaining projects like DaCapo, Renaissance, or Jet Stream is a huge effort.
Following up on my last blog post, I am going to look at how Ruby is used to get a bit of an impression of whether there are major differences between Ruby and Smalltalk in their usage.
Recently, I was wondering how large code bases look like when it comes to the basic properties compiler might care about. And here I am not thinking about dynamic properties, but simply static properties such as length of methods, number of methods per class, number of fields, and so on.
To prepare some experiments with Pharo’s new compiler infrastructure and a simple AST interpreter, I ported my implementation of the Ownership-based Metaobject Protocol (OMOP) to the Pharo 3. Loading the OMOP into an image will give you an STM implementation, a basic actor system, communicating sequential processes, Clojure-like agents, and active objects. Eventually, the goal is to provide a more extensive set of such concurrent programming mechanisms on top of the OMOP, but for now these five should already give an impression of how the OMOP itself works.
My paper, on how to support various concurrency models, with an ownership-based meta-object protocol (MOP) was accepted at TOOLS’12. Below, you will find a preprint version of the paper. A later post will provide details on how to use it and how to experiment with the MOP in Pharo 1.3.
Along the way to measure the performance of a Smalltalk implementation for commodity multi-core systems, I tried to use Pharo as a more convenient development platform. Well, and I failed in the first attempt…