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Welcome to the preview release of codename "Alchemy." Alchemy is a research project that allows users to compile C and C++ code that is targeted to run on the open source ActionScript Virtual Machine (AVM2). The purpose of this preview is to assess the level of community interest in reusing existing C and C++ libraries in Web applications that run on Adobe® Flash® Player and Adobe AIR®.

With Alchemy, Web application developers can now reuse hundreds of millions of lines of existing open source C and C++ client or server-side code on the Flash Platform.  Alchemy brings the power of high performance C and C++ libraries to Web applications with minimal degradation on AVM2.  The C/C++ code is compiled to ActionScript 3.0 as a SWF or SWC that runs on Adobe Flash Player 10 or Adobe AIR 1.5.

Alchemy is primarily intended to be used with C/C++ libraries that have few operating system dependencies. Ideally suited for computation-intensive use cases, such as audio/video transcoding, data manipulation, XML parsing, cryptographic functions or physics simulation, performance can be considerably faster than ActionScript 3.0 and anywhere from 2-10x slower than native C/C++ code. Alchemy is not intended for general development of SWF applications using C/C++.

Download and Discuss

With Alchemy, it is easy bridge between C/C++ and ActionScript 3.0 to expand the capabilities of applications on the Flash Platform, while ensuring that the generated SWCs and SWFs cannot bypass existing Flash Player security protections.

Adobe is providing some example libraries, and developers are encouraged to share their ported libraries.

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Google has released Chrome 14 to the Chrome beta testing channel, which includes, among other new features, the initial beta release of Google’s "Native Client" technology, first announced in 2010.

If you’d like to try out Chrome 14 beta, head on over to the beta downloads page.

Chrome 14 has several improvements including the much better OS X Lion integration we mentioned previously, along with print preview support for Mac OS X users. But possibly the biggest news is that Google’s Native Client technology is getting closer to prime time.

Native Client is a set of open source tools that allow Chrome to run compiled C and C++ code the same way the browser currently runs JavaScript or other common web programming languages. Native Code offers both a security sandbox and a set of interfaces that provide C and C++ bindings to the capabilities of HTML5. That means web application developers will be able to tap into desktop libraries to create faster, more powerful web apps.

For example, imagine you wanted to create a video editing web app along the lines of Final Cut Pro. You could building the user interface with HTML, CSS and JavaScript, but the actual processing of video would likely be very slow if you handed off the job to the server. You could try to use JavaScript in the browser, but again speed would be an issue. Native Client would allow you to do the video processing in the browser, but running native code. Then all you need to do is push the final changes up to the server, which makes for a much snappier web app.

How much faster Native Client will be is open to debate. Certainly JavaScript performance has improved since Google first announced Native Client in June 2010. The past year has seen huge JavaScript speed improvements in nearly all the major web browsers, which means Native Client feels less necessary than it might have when Google first began working on it. Of course there are still plenty of web apps, especially computationally intensive apps like non linear video editors, that could benefit from Native Client.

The problem for web app developers is that thus far Native Client is only available in Chrome. Google has created an API, dubbed Pepper (Native Client is abbreviated NaCl, which is also shorthand for table salt, get it?) which allows the browser to talk to Native Client and means that any web browser could, in theory, implement it. Thus far, however, none have.

For now, if you want to test out some Google’s sample code, grab the latest Chrome beta and head on over to the Native Client demo page. In my testing Native Client was indeed quite speedy, but running it for any length of time sent my laptop’s fan into overdrive.

Conway's Game of Life Running in Native Client

While Native Client is still a beta release, if it catches on with developers and other browsers embraced it, Native Client could open the doors for a whole new generation of faster, more powerful web apps.

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