Node.js modules and apps that work with C++ libraries/services that return 64bit numbers. Not having 64bit integers is an issue.
Re:The State of JavaScript - Brendan Eich
by BrendanEich on Tuesday October 09, 2012 @03:24PM
(#4633491)
Is the lack of bignums (more than int64) the real issue? JS has IEEE754 binary double so that's the same as in Python.
Library code can be cross-compiled a number of ways, so I wonder whether the blocker is the lack of Pythonic long.
JS is never going to take over on the server for me until it can compete with Python's statistics support, I didn't see much in these slides that suggests it could.