[Limerick] Machine Learning with Julia

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Abstract:

Machine Learning, Visualization, Distributed and High-Performance Computing in Julia

In the long history of programming languages, only a handful of them had been developed and designed from the onset for scientific and high-performance computing. Most noteworthy of them is the development of FORTRAN In 1954 by John Backus of IBM. FORTRAN is still a favourite language to run numerical calculations in the world’s fastest supercomputers because of its highly optimized compiled code.

With the increasing improvements in computer technology, scripting languages such as R (1993) and Python (1991) became more popular in statistical and scientific computing for their user-friendliness syntax and interactivity at the expense of performance. Typically, R and Python interpreters are used to call functions from libraries compiled in C/C++ or Fortran. Critical tasks are still written in a low-level language for performance which makes the entire development workflow slow because of having to deal with the two-language problem.

Recently, a new language called Julia (2012) was developed in MIT to take advantage of the recent developments in compiler technology and computing. Julia is a high-level just-in-time compiler designed for high-performance computing. It runs as fast as statically-compiled languages such as C/Fortran but uses a very high-level dynamic language. It supports modern language features such as: map-reduce style parallelism and distributed computation, coroutines, automatic code generation, metaprogramming, dynamic type system, and multiple dispatch. It aims to solve the two-language problem by having a user-friendly, interactive, and dynamic language but statically compiling the code on the fly for optimal performance. In Julia, most of the math/stat/scientific/machine-learning libraries and packages are written in Julia itself which makes the entire workflow easy to explore, modify, and maintain.

In this talk, I will discuss my recent explorations of using Julia to implement machine learning algorithms exploiting various Julia features including most importantly parallelism, distributed computations, and meta-programming. The talk covers the following areas: parallel weight update across layers by Direct Feedback Alignment (DFA) for deep learning architectures, population ensembling and evolution of machine learning models, as well as performance tracking and visualization.

About the Speaker

Paulito P. Palmes is currently a Research Scientist in IBM Ireland’s Dublin Research Lab (DRL) with research interests in the areas of data mining, deep learning, cognitive computing, and biomedical engineering.