What Node.js does is it claims to allow the server to support more connections. For example, PHP + apche can support 4000 concurrent connections, while Node.js + apche can support tens of thousands of concurrent connections.
Why so great?
On the one hand, node.js creates connections that simply emit events, do not generate OS threads, and therefore consume no resources, and there are no resource locks.
Node.js, on the other hand, has built-in in-memory queuing, or asynchronous, so it can respond quickly to a flood of user connections.
Node.js, which is javascript that runs on the server side, is powered by Google Chrome’s V8 javascript engine. Javascript is really getting more and more popular, not the old tree sprout, but the tree of life evergreen! It has been said that one of the best languages a long-career programmer should learn if he or she wants to return to programming in 2014 is javascript.
Why is javascript so awesome? On the one hand, it is in the Internet era and closely integrated with the Internet. On the other hand, it is syntactically flexible, an unusual language that is more in keeping with the free-wheedled nature of programmers.
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Reference article:
www.ibm.com/developerwo… \