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We present JOG, a framework for developing peephole optimizations and accompanying tests for Java compilers. JOG allows developers to write a peephole optimization as a pattern in Java itself. Such a pattern contains code before and after the desired ...

Tracking specific events in a program’s execution, such as object allocation or lock acquisition, is at the heart of dynamic analysis. Despite the apparent simplicity of this task, quantifying these events is challenging due to the presence of compiler ...

Heterogeneous programming models are becoming increasingly popular to support the ever-evolving hardware architectures, especially for new and emerging specialized accelerators optimizing specific tasks. While such programs provide performance portability ...

Just-in-time (JIT) compilers achieve application portability and improved management of large code-bases by abstracting the architecture specific details from programmers. Eclipse OMR and Eclipse OpenJ9 invest extensively in JIT technology to ...

Virtual machine performance tuning for a given application is an arduous and challenging task. For example, parametrizing the behaviour of the JIT compiler machine code caches affects the overall performance of applications while being rather obscure ...

Testing and debugging a Virtual Machine is a laborious task without the proper tooling. This is particularly true for VMs with JIT compilation and dynamic code patching for techniques such as inline caching. In addition, this situation is getting worse ...

Dynamically-typed programming languages are often implemented using interpreters, which offer several advantages in terms of portability and flexibility of the implementation. However, as a language matures and its programs get bigger, programmers may ...

Modern “safe” programming languages follow a design principle that we call safety by default and performance by choice. By default, these languages enforce important programming abstractions, such as memory and type safety, but they also provide ...

The prevalence of dynamic languages is not commensurate with the security guarantees provided by their execution mechanisms. Consider, for example, the ubiquitous case of JavaScript: it runs everywhere and its complex just-in-time compilers produce code ...

WebAssembly (Wasm) is a safe, portable virtual instruction set that can be hosted in a wide range of environments, such as a Web browser. It is a low-level language whose instructions are intended to compile directly to bare hardware. While the initial ...

The maturation of the Web platform has given rise to sophisticated and demanding Web applications such as interactive 3D visualization, audio and video software, and games. With that, efficiency and security of code on the Web has become more important ...

Many guest languages are implemented using the Java Virtual Machine (JVM) as a host environment. There are two major implementation choices: custom compilers and so-called hosted interpreters. Custom compilers are complex to build but offer good ...

Language composition approaches have traditionally suffered from poor performance. In this paper we hypothesise that meta-tracing provides a means to compose independent language interpreters while retaining the performance levels of each. To study this ...

The Java virtual machine is a popular target for many language implementers. Due to the unusually poor performance of hosted interpreters, many programming language implementers resort to implementing a custom compiler that emits Java bytecode instead. ...

This survey describes research directions in techniques to improve the performance of programs written in the Java programming language. The standard technique for Java execution is interpretation, which provides for extensive portability of programs. A ...