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From what I've seen AMD's recent chips beat (sometimes outright destroy) Intel on multithreaded tasks, but on single-threaded tasks it's still a bit of a toss u
by api 7y ago
From what I've seen AMD's recent chips beat (sometimes outright destroy) Intel on multithreaded tasks, but on single-threaded tasks it's still a bit of a toss up and depends on the work load. Intel seems to still come out ahead on some heavy numeric and scientific type work loads, especially if vector instructions are used. The differences are not huge though, and AMD solidly wins on price/performance even in cases where it's a bit slower in absolute performance for single threaded work.
At this point Intel literally only makes sense if you have one of those single threaded work loads where it still excels and you absolutely must have the fastest single thread performance.
- dilyevsky 7y agoIs that with spectre/meltdown/etc protection on?
- blattimwind 7y agoThese are VMs, the hosts have to run with these mitigations enabled.
- api 7y agoDon't know, but for pure numeric code these mitigations are not (AFAIK) that expensive. The main cost is incurred for any code that is syscall-heavy like I/O.
- dilyevsky 7y agoPure numeric benches aren’t very useful irl tho. My hunch is with security patches single core will be very comparable
- imajoo 7y agoAWS patched their hosts back in 2018 which caused a huge shitstorm in terms of performance lost across various workloads..so yes. https://blog.appoptics.com/visualizing-meltdown-aws/ https://blog.appoptics.com/visualizing-meltdown-aws/