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0 pointsmbreese12y ago0 comments

Be serious. It's not a question of the process not responding for 10 seconds.

If the same code in V8 is causing a pause to deal with GC, then the LLVM compiled code must be doing something different to handle the memory. Is it using a different GC? Is it running on a different thread? Is it just sucking up memory without freeing it?

These are all things that need to be known before getting too excited about the speed of LLVM compiled Javascript.

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4 comments · 1 top-level

moisy12y ago· 3 in thread

I don't know the details but in my opinion a deamon thread like with the Java could work. Besides, I don't think V8 specifically designed for the server use.

cliffbean12y ago

If you implement a GC which runs on its own thread, doesn't pause the application, and achieves good overall performance on any real-world code, then it would be a terrific thing to mention in your big blog post announcing the system. We'd love to hear anything you'd like to say about it.

If you don't mention it, and if you also say numerous other things which give the impression that you may not have given the entire topic much thought, then even people who would otherwise prefer to be positive and supportive may struggle to take you seriously, and may react with frustration if you also make extraordinary claims.

obastemur12y ago

My colleague told me the comments here.

I didn't mention clearly since it wasn't a big part of the picture. Dynamic Type part was a bigger problem! Right now I prefer a separate thread for GC but I have also couple of bad cases for this kind of garbage collection. I don't think there is a 'one perfect GC for every kind of usage'. But my focus is performance consistency. Sorry for passing it on my post. I added a side note saying (GC thread).

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ithkuil12y ago

Perhaps because they take those features for granted because it uses some GC provided by LLVM ?

(I don't know anything about LLVM support for GC, but I would be surprised if it comes with a GC that doesn't require to do something special in order to make it concurrent)

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