August 2011
Intermediate to advanced
280 pages
6h 50m
English
Content preview from Programming Concurrency on the JVM
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Speedup for the IO-Intensive App
Figure 1. Speedup as the pool size is increased
The nature of IO-intensive applications allows for a greater degree of concurrency even when there are fewer cores. When blocked on an IO operation, we can switch to perform other tasks or request for other IO operations to be started. We estimated that on a two-core machine, about twenty threads would be reasonable for the stock total asset value application. Let’s analyze the performance on a two-core processor for various numbers of threads—from one to forty. Since the total number of divisions is forty, it would not make any sense to create more threads than that. ...
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