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A Concurrent Copying Garbage Collector for Languages that Distinguish (Im)mutable Data

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RRB Vector: A Practical General Purpose Immutable Sequence

Martin Odersky, Tiark Rompf, Nicolas Alexander Stucki, Vlad Ureche

State-of-the-art immutable collections have wildly differing performance characteristics across their operations, often forcing programmers to choose different collection implementations for each task. Thus, changes to the program can invalidate the choice ...

ACM2015

Region-based off-heap memory for Scala

This work explores support for region-based memory in Scala through macro-based domain-specific encoding that exploits a number of extensible language features such as implicits and value classes. ...

2015

Spores: A Type-Based Foundation for Closures in the Age of Concurrency and Distribution

Martin Odersky, Philipp Haller

Functional programming (FP) is regularly touted as the way forward for bringing parallel, concurrent, and distributed programming to the mainstream. The popularity of the rationale behind this viewpoint (immutable data transformed by function application) ...

2014

On Lock-Free Work-stealing Iterators for Parallel Data Structures

Martin Odersky, Aleksandar Prokopec, Dmytro Petrashko

With the rise of multicores, there is a trend of supporting data-parallel collection operations in general purpose programming languages. These operations are highly parametric, incurring abstraction performance penalties. Furthermore, data-parallel operat ...

2014

Achieving Efficient Work-Stealing for Data-Parallel Collections

Martin Odersky, Aleksandar Prokopec

In modern programming high-level data-structures are an important foundation for most applications. With the rise of the multi-core era, there is a growing trend of supporting data-parallel collection operations in general purpose programming languages and ...

2013

Spores, Formally

Philipp Haller

2013

Lightweight Snapshots and System-level Backtracking

George Candea, Edouard Bugnion, Vitaly Chipounov

We propose a new system-level abstraction, the lightweight immutable execution snapshot, which combines the immutable characteristics of checkpoints with the direct integration into the virtual memory subsystem of standard mutable address spaces. The abstr ...

USENIX2013

On the cost of composing shared-memory algorithms

Rachid Guerraoui, Dan Alistarh, Giuliano Losa

Decades of research in distributed computing have led to a variety of perspectives on what it means for a concurrent algorithm to be efficient, depending on model assumptions, progress guarantees, and complexity metrics. It is therefore natural to ask whet ...

ACM Press2012

RRB-Trees: Efficient Immutable Vectors

Tiark Rompf

Immutable vectors are a convenient data structure for functional programming and part of the standard library of modern languages like Clojure and Scala. The common implementation is based on wide trees with a fixed number of children per node, which allow ...

2011

JReq: Database Queries in Imperative Languages

Willy Zwaenepoel, Emmanuel Cecchet, Christopher Ming-Yee Iu

Instead of writing SQL queries directly, programmers often prefer writing all their code in a general purpose programming language like Java and having their programs be automatically rewritten to use database queries. Traditional tools such as object-rela ...

Springer Verlag2010