The CPU / RAM bottleneck isn't getting any faster. Latency is actually increasing with newer versions of DDR. Most of your CPU time is spent waiting on memory.

The CPU / RAM bottleneck isn't getting any faster. Latency is actually increasing with newer versions of DDR. Most of your CPU time is spent waiting on memory. Compilers are hard-pressed to make you choose efficient data-structures. You just need to know the implementation details to get a responsive user experience.