Andy Wingo

North Carolina (USA), 1980


Latest Updates

Andy Wingo 19/01/2014

elf in guile

Good evening, gentle hackfolk!Today I'd like to wrap up my three-part series of articles on what's new in Guile 2.2's compiler and runtime. I talked about the virtual machine a couple months ago, and the compiler internals just last...

Andy Wingo 12/01/2014

a continuation-passing style intermediate language for guile

Happy new year's, hackfolk!A few weeks ago I wrote about the upcoming Guile 2.2 release, and specifically about its new register virtual machine. Today I'd like to burn some electrons on another new part in Guile 2.2, its intermediate...

Andy Wingo 18/12/2013

optimizing let in spidermonkey

Peoples! Firefox now optimizes let-bound variables!What does this mean, you ask? Well, as you nerdy wingolog readers probably know, the new ECMAScript 6 standard is coming soon. ES6 has new facilities that make JavaScript more expressive. At the same...

Andy Wingo 08/05/2013

generators in v8

Hey y'all, ES6 generators have landed in V8! Excellent!Many of you know what that means already, but for those of you that don't, a little story.A few months ago I was talking with Andrew Paprocki over at Bloomberg. They use JavaScript in all...

Andy Wingo 18/04/2013

inside full-codegen, v8's baseline compiler

Greetings to all. This is another nargish article on the internals of the V8 JavaScript engine. If that's your thing, read on. Otherwise, here's an interesting interview with David Harvey. See you laters!full-codegenToday's topic is...


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Assign bailout and type feedback IDs in a post-pass

Assign bailout and type feedback IDs in a post-pass This will allow us to move expressions from one function to another, for example when the parser determines that a given cover grammar instance is actually the default value initializer for an arrow...

Andy Wingo21/10/2014

Track usage of "this" and "arguments" in Scope

Track usage of "this" and "arguments" in Scope This adds flags in Scope to track wheter a Scope uses "this" and, "arguments". The information is exposed via Scope::uses_this(), and Scope::uses_arguments(), respectively. Flags for tracking usage on any...

Andy Wingo16/10/2014 should use SameValue should use SameValue BUG=v8:3576 LOG=,, Review URL: Patch from Diego Pino . git-svn-id:...

Andy Wingo16/10/2014

Implement .forEach() on typed arrays

Implement .forEach() on typed arrays BUG=v8:3578 LOG=Y, Review URL: Patch from Adrian Perez de Castro . git-svn-id:...

Andy Wingo16/10/2014

Clean up manual bit field usage in PreParserExpression

Clean up manual bit field usage in PreParserExpression Instead of using an integer value and manual bit-fiddling, use C++'s support for specifying bit sizes for integral types. This way the bits used to describe a PreParserExpression are handled by the...

Andy Wingo07/10/2014