{"id":182236,"date":"2008-12-02T00:00:00","date_gmt":"2009-10-31T09:28:44","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/msr-research-item\/compiling-the-web-building-a-just-in-time-compiler-for-javascript\/"},"modified":"2016-09-09T09:51:09","modified_gmt":"2016-09-09T16:51:09","slug":"compiling-the-web-building-a-just-in-time-compiler-for-javascript","status":"publish","type":"msr-video","link":"https:\/\/www.microsoft.com\/en-us\/research\/video\/compiling-the-web-building-a-just-in-time-compiler-for-javascript\/","title":{"rendered":"Compiling the Web – Building a Just-in-Time Compiler for JavaScript"},"content":{"rendered":"
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Over the last decade we have made great strides towards improving the execution performance of virtual-machine (VM) based high level programming languages. Today, dynamic compilation is standard in most Java and C# VMs, enabling programs written in these languages to execute with similar efficiency as legacy type-unsafe C or assembly code.<\/p>\n

However, for the past decade much of the research and development effort in the Just-in-Time compilation domain was focused on the runtime compilation of statically typed languages, leaving an important and steadily growing field of programming languages behind: dynamically typed high level languages such as JavaScript, Python, PHP and Ruby. Combined with an explosive growth of web applications and the wide-spread use of dynamically typed programming languages for the client and server side of such web applications, this has created a situation where bytecode interpretation is suddenly again the predominant mode of execution for much of the code used on a daily basis on desktop computers, including popular web programs and services like Google Mail or Google Docs.<\/p>\n

In this talk I will report on the design and development of TraceMonkey, the JavaScript Just-in-Time compiler in Mozilla’s Firefox web browser. I will discuss the fundamental differences between statically typed and dynamically typed languages from the perspective of a compiler constructor, and I will highlight some of the unique challenges for compiling dynamically typed languages such as JavaScript.<\/p>\n<\/div>\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

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