parallel-processing

Should I always use a parallel stream when possible?

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A parallel stream has a much higher overhead compared to a sequential one. Coordinating the threads takes a significant amount of time. I would use sequential streams by default and only consider parallel ones if I have a massive amount of items to process (or the processing of each item takes time and is parallelizable) … Read more

What is the difference between concurrency and parallelism?

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Concurrency is when two or more tasks can start, run, and complete in overlapping time periods. It doesn’t necessarily mean they’ll ever both be running at the same instant. For example, multitasking on a single-core machine. Parallelism is when tasks literally run at the same time, e.g., on a multicore processor. Quoting Sun’s Multithreaded Programming … Read more

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