koa hangs when using ctx.body with 500kB of JSON [UPD: actually it's not the reason]
tested on OS: Ubuntu, koa: 2.0, 2.2, nodejs: 7.6, 7.9
Originally in my project there was mongoose data aggregation with 100kB of output data. Requests were running up to 200ms, but sometimes they just stoped responding.
So I assigned JSON copy of DB collection to ctx.body to test this issue. 
`ctx => { ctx.body = [hella huge array] }` 
Same thing, but now I have to make just 7-15 requests (fr. 0.5req/sec, but this doesn't actually mater) to see that one of them a bit laggy and the next one doesn't apears in logs and hangs. CPU consuption is 100% on node.js process. 
express.js runs fine, by the way.
Sorry for my bad english. Hope that it would be easy to reproduce the problem. And good luck with solution. My project is not so big, so I going to port it to express.js. So no hurry. 


UPD: turns out that koa is fine, see my comments below
