ES 3.1 implementations?

Brendan Eich brendan at
Thu Jun 26 00:12:41 PDT 2008

On Jun 25, 2008, at 11:46 PM, Allen Wirfs-Brock wrote:

> Yes, and of course SpiderMonkey.  For no particularly good reason I  
> simply have the other two positioned in my mind as perhaps being  
> more (technically) approachable for somebody who wanted to plunge  
> into such an effort. I may well be misguided in that perception.

(Was that a cut? :-P)

It's true, SpiderMonkey won't win any beauty pageants, but it gets  
the job done and people do hack on it. No mature and/or optimized  
engine is all that easy to hack on, and C or C++ is the wrong  
language for implementing interpreters and compilers, if the goal is  
clarity and extensibility. Java is better, SML is much better -- to  
pick non-random examples.

Which reminds me, any thoughts on the RI subset?


> -----Original Message-----
> From: Brendan Eich [mailto:brendan at]
> Sent: Wednesday, June 25, 2008 10:16 PM
> To: Allen Wirfs-Brock
> Cc: Robert Sayre; es4-discuss; es3.x-discuss at
> Subject: Re: ES 3.1 implementations?
> On Jun 25, 2008, at 8:53 PM, Allen Wirfs-Brock wrote:
>> It would be great if somebody wanted to work on a proof of concept
>> ES 3.1 implementation in a open code bases such as such as Webkit
>> or Rhino.
> Don't forget SpiderMonkey.
>> If anybody is interested in volunteering send a not to es3.x-
>> discuss at
> There's the ES4 RI as well -- did you have anyone already lined up to
> work on the 3.1 subset of it?
> /be
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