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  • Which is to say that the biggest perfomances differences come from:

    Faster local storage
    Faster networking locally and to the internet
    More physical cores on the CPU
    More total memory

    That list is very dependent on application. Currently using a 24 core 3960X with 128GB RAM for work (3D modelling) and it's about half as fast as my i9/32GB. Even a new i5 would be significantly quicker. Network and storage speeds also irrelevant in this case, even loading and saving is CPU-bound.

  • Network and storage speeds also irrelevant in this case, even loading and saving is CPU-bound.

    Since 2005 CPU and memory speeds haven't improved: https://colin-scott.github.io/personal_website/research/interactive_latency.html

    What's improved have been storage speeds (SSDs got faster, SSDs replaced HDDs) and networking speeds.

    The only big difference on a CPU has been the number of physical cores provided.*

    We've gone from Moore's law to Amdahl's law.

    * And heterogeneous CPUs with mixed types of cores making "a core" (almost all recent Intel, AMD, and ARM designed chips like the M1) and also shared virtual memory which allows a single piece of on-processor memory to be exposed to multiple processing units (i.e. certain Intels, AMD Ryzen, Apple M1).

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