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One of the emergent technologies in the IT field, which recently achieved resounding success, is Node.js, an open-source cross-platform.
Node.js is a platform that develops information systems and is oriented to performance optimization, offering developers tools which simplify their job.
Optimizing the performance means, in most cases, scaling every type of interactivity performed by the actors of the system.
Before Node.js, traditional technologies (as Java or PHP) used to develop these systems allowed a performance improvement based on the multi-thread model. Node.js instead proposes an event-based model that differentiates itself mainly for the asynchronous management of the I/O options.
The multi-thread model instead manages performances in a synchronous mode, this model is supported by the event loop, which runs tasks corresponding to asynchronous operations, taking advantage of a thread pool able to improve performances.
All is offered at a platform level and the developer can write the source code of its system without worrying about its management unlike the thread-based model that, running the I/O operations in a blocking mode, forces the developer to use multi-threading programming techniques which are really tricky, complex and even a waste of memory.
Another important aspect of the Node.js is the modularity, a simple mechanism that allows to add functionality to the platform, based on the needs of the software systems.