Evaluation of a just-in-time compiler retrofitted for PHP

Tatsubori, Michiaki; Tozawa, Akihiko; Suzumura, Toyotaro; Trent, Scott; Onodera, Tamiya

doi:10.1145/1735997.1736015

Cited by 13 publications

(6 citation statements)

References 18 publications

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“…Quercus [27] and P9 [30] similarly compile PHP source into JVM bytecodes ahead-of-time. This approach to compilation is similar to ahead-of-time compilation to C or C++, since both the CLR and JVM are statically typed virtual machines.…”

Section: Other Php Enginesmentioning

confidence: 99%

The hiphop virtual machine

Adams

Evans

Maher

et al. 2014

Proceedings of the 2014 ACM International Conference on Object Oriented Programming Systems Languages &Amp; Applications

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The HipHop Virtual Machine (HHVM) is a JIT compiler and runtime for PHP. While PHP values are dynamically typed, real programs often have latent types that are useful for optimization once discovered. Some types can be proven through static analysis, but limitations in the aheadof-time approach leave some types to be discovered at run time. And even though many values have latent types, PHP programs can also contain polymorphic variables and expressions, which must be handled without catastrophic slowdown.HHVM discovers latent types by structuring its JIT around the concept of a tracelet. A tracelet is approximately a basic block specialized for a particular set of run-time types for its input values. Tracelets allow HHVM to exactly and efficiently learn the types observed by the program, while using a simple compiler. This paper shows that this approach enables HHVM to achieve high levels of performance, without sacrificing compatibility or interactivity.

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Section: Other Php Enginesmentioning

confidence: 99%

The hiphop virtual machine

Adams

Evans

Maher

et al. 2014

Proceedings of the 2014 ACM International Conference on Object Oriented Programming Systems Languages &Amp; Applications

View full text Add to dashboard Cite

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“…One approach to improve the performance of PHP has been to leverage Java Virtual Machines (JVM) by translating PHP into Java bytecode [16,17,21]. Tatsubori et al [21] have pursued this approach by retrofitting PHP into IBM's P9 JVM.…”

Section: Related Workmentioning

confidence: 99%

“…Tatsubori et al [21] have pursued this approach by retrofitting PHP into IBM's P9 JVM. Compared to Zend, their evaluation shows a 20-30% improvement on SPECweb2005, and 2.5×-9.5× improvement on micro-benchmarks.…”

Section: Related Workmentioning

confidence: 99%

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The HipHop compiler for PHP

ZhaoHaiping¹,

ProctorIain²,

YangMinghui³

et al. 2012

SIGPLAN Not.

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Scripting languages are widely used to quickly accomplish a variety of tasks because of the high productivity they enable. Among other reasons, this increased productivity results from a combination of extensive libraries, fast development cycle, dynamic typing, and polymorphism. The dynamic features of scripting languages are traditionally associated with interpreters, which is the approach used to implement most scripting languages. Although easy to implement, interpreters are generally slow, which makes scripting languages prohibitive for implementing large, CPU-intensive applications. This efficiency problem is particularly important for PHP given that it is the most commonly used language for server-side web development.This paper presents the design, implementation, and an evaluation of the HipHop compiler for PHP. HipHop goes against the standard practice and implements a very dynamic language through static compilation. After describing the most challenging PHP features to support through static compilation, this paper presents HipHop's design and techniques that support almost all PHP features. We then present a thorough evaluation of HipHop running both standard benchmarks and the Facebook web site. Overall, our experiments demonstrate that HipHop is about 5.5× faster than standard, interpreted PHP engines. As a result, HipHop has reduced the number of servers needed to run Facebook and other web sites by a factor between 4 and 6, thus drastically cutting operating costs.

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“…Using a combination of inlining and other LLVM optimizations, it would convert the bytecode into optimized native code, then directly execute that code. Another project, P9 [28], re- targeted an existing JIT called TR JIT to a PHP front end. This JIT is also used in the IBM J9 Java VM.…”

Section: Related Workmentioning

confidence: 99%

HappyJIT

Homescu

Şuhan

2011

SIGPLAN Not.

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Current websites are a combination of server-generated dynamic content with client-side interactive programs. Dynamically -typed languages have gained a lot of ground in both of these domains. The growth of Web 2.0 has introduced a myriad of websites which contain personalized content, which is specific to the user. PHP or Python programs generate the actual HTML page after querying a database and processing the results, which are then presented by the browser. It is becoming more and more vital to accelerate the execution of these programs, as this is a significant part of the total time needed to present the page to the user. This paper presents a novel interpreter for the PHP language written in RPython, which the PyPy translator then translates into C. The translator integrates into the interpreter a tracing just-intime compiler which optimizes the hottest loops in the interpreted programs. We also describe a data model that supports all the data types in the PHP language, such as references and iterators. We evaluate the performance of this interpreter, showing that speedups up to a factor of 8 are observed using this approach.

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Evaluation of a just-in-time compiler retrofitted for PHP

Cited by 13 publications

References 18 publications

The hiphop virtual machine

The hiphop virtual machine

The HipHop compiler for PHP

HappyJIT

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