My js ported directly from this, not from Nxt sources

ok, but did you actually test the c++ program?
No, compared only with Nxt sources behavior.
I'm getting quite terrible results from node.js - last time I checked they were 10 times worse than ones from the browser...
I would appreciate if anyone would share his (her?) results from within the browser
CPU - core i5 2.6ghz
Chrome 32beta:
crypto_sign - 64ms, crypto_verify - 32ms
Node.js:
crypto_sign - 88ms, crypto_verify - 44ms
Firefox 26:
crypto_sign - 80ms, crypto_verify - 60ms
Results depends on "how you're measure" them

Sometimes browser can be meditative and run JS slowly and i get worst results(~ x2 slower). And if i call this functions in 100x cycle then avg time is better(36ms, 29ms on chrome).