In case your system is actually waiting around for I/O (ie. a drive realize/produce or network comprehend/generate etc), the new Central processing unit is free to do most other jobs even though your program is actually averted. (I utilized "could be" since you have to take most other tips into consideration. Memory is but one analogy.) The newest Node.js centered-inside the asynchronous We/O surgery be a little more productive than simply Professionals will likely be.