WebStorm: Debugging io.js and Node.js 0.12 applications is 7x times slower than was in Node.js 0.10

Hello,

I've filed an issue for io.js about this, there: https://github.com/iojs/io.js/issues/877

My investigation results are int my last comment:

"Ok, guys, there is the stuff. I have full pcap captures of Node.js 0.10.36 and io.js 1.2.0 debugging sessions. I've made it with RawCap, it shows a WebStorm debugging session from beginning to get a restify server started. I placed a breakpoint there.


io.js: http://1drv.ms/1w4n04n
Node.js 0.10.36: http://1drv.ms/1w4nyXW


You can open them in Wireshark, and can filter to communication streams by using the following filter:
tcp.stream eq 0 && tcp.len > 0


The whole session length is:

• node.js 0.10.36: 11 seconds
• io.js 1.2.0: 78 secons

This mean it takes 7x more time to get breakpoint hit in io.js! If this is not a bug, then what?
I cannot se any notable difference between the communication (Follow TCP stream in Wireshark), in io.js it just slow.
I'd appreciate if someone with deep v8 debugger knowledge could take a look at this, thanks!"

Maybe this originated from WebStorm side. Any though on this?

I've attached capture files there too.