Java - multithreaded code does not run faster on more cores

Question

I was just running some multithreaded code on a 4-core machine in the hopes that it would be faster than on a single-core machine. Here\'s the idea: I got a fixed number of thre

Answer 1

synchronizing across cores is much slower than syncing on a single core

because on a single cored machine the JVM doesn't flush the cache (a very slow operation) during each sync

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