1) Pretty tight. The abstraction layer between v8 and node isn't thick enough or generalized enough, from what I can tell. To be fair, writing an abstraction layer between multiple JS engines is very difficult (I am doing such now for a different project, non-web related). JSC and v8, for instance, have *very* different ideas of how to do things. From what I understand, as well, SpiderMonkey has really limited support for passing arbitrary information (void *) in callback functions, which is part of the magic of v8.
2) Wondering what "runtime API" compatibility means. If it means "SpiderMonkey will have a similar class structure to v8, with a very similar callback pattern, then abstraction layers for node are possible and you could run it off SpiderMonkey. But looking at SpiderMonkey's API, thats doubtful. If it means "SpiderMonkey's JS environment will have a completely congruous API to the v8 JS environment", then that doesn't really make it easier to run node on SpiderMonkey, because a significant abstraction layer would need to be built and some re-organization done before it node's Buffer/Parser classes could work through the layer on both engines, both of which are pretty key to node. However, restructuring for SpiderMonkey would probably make building on top of JSC pretty easy, as its kind of "in the middle" between SM and v8. On Fri, May 11, 2012 at 1:00 AM, dhruvbird <[email protected]> wrote: > I was wondering - how tightly coupled is node to v8 actually? I mean I > have heard that mozilla is making their runtime API compatible with > that of the v8 API, so is it possible to just plug it in instead of > v8? I remember seeing a project called SpiderNode doing so a while > ago. > > Regards, > -Dhruv. > > On May 10, 7:51 am, Erik Dubbelboer <[email protected]> wrote: > > They actually use Rhino <http://www.mozilla.org/rhino/doc.html> instead > of > > V8. > > > > > > > > > > > > > > > > On Thursday, May 10, 2012 3:56:26 AM UTC+2, Matt Sergeant wrote: > > > > > No. > > > > > Though I imagine Isaacs is wondering where the file read performance > > > difference is. My gut feeling is that Java maybe uses mmap under the > hood, > > > or some other performance trick. It would be much more obvious if there > > > were strace output. There's also other probable wins, like using a > newer V8 > > > that optimises non-VM functions (see recent thread about threads-a-gogo > > > being faster even with just one thread). > > > > > On Wed, May 9, 2012 at 9:32 PM, Node42 <[email protected]> wrote: > > > > >> <a href=" > > >> > http://vertxproject.wordpress.com/2012/05/09/vert-x-vs-node-js-simple.. > .">Benchmark > > >> </a> > > > > >> <a href="http://news.ycombinator.com/item?id=3948727";>Hacker News > > >> Discussion</a> > > > > >> <a href="http://news.ycombinator.com/item?id=3927891";>Hacker News > > >> Discussion 2</a> > > > > >> <a href="http://vertx.io/";>Vert.x</a> > > > > >> <a href="http://www.infoq.com/news/2012/05/vertx";>InforQ article</a> > > > > >> <a href=" > > >> > http://fbflex.wordpress.com/2012/05/02/running-vert-x-applications-on.. > .">Running > > >> Vert.x Applications on Heroku</a> > > > > >> -- > > >> Job Board:http://jobs.nodejs.org/ > > >> Posting guidelines: > > >>https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > > >> You received this message because you are subscribed to the Google > > >> Groups "nodejs" group. > > >> To post to this group, send email to [email protected] > > >> To unsubscribe from this group, send email to > > >> [email protected] > > >> For more options, visit this group at > > >>http://groups.google.com/group/nodejs?hl=en?hl=en > > -- > Job Board: http://jobs.nodejs.org/ > Posting guidelines: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > You received this message because you are subscribed to the Google > Groups "nodejs" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nodejs?hl=en?hl=en > -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en
