News for hackers. Stuff that matters.

A comment on Apple M1 vs. Ryzen 3900X vs. Intel I9 in Software Development. Parent comment

Re:Apple M1 vs. Ryzen 3900X vs. Intel I9 in Software Develop... by GeekyBear on Monday December 14, 2020 @03:02PM (#25422465)
People who were looking for a root cause of the iOS JavaScript performance advantage have been pointing to that instruction as "the" reason before it was even used by Safari.

https://mobile.twitter.com/saambarati/status/104920213252247...

I'm sure it doesn't hurt, but the performance advantage predates the instruction's use.

Here's another theory.

>Finally doing perf counters on a dedicated test bench... 9900K having 60% worse branch misprediction than Apple's A12.

https://twitter.com/andreif7/status/1307420010177007625

[ Parent | on HN ]
Re:Apple M1 vs. Ryzen 3900X vs. Intel I9 in Software Develop... by marmaduke on Monday December 14, 2020 @03:39PM (#25422959)
the second theory seems better in my experience. I pulled a few js benchmarks and ran on native Safari on m1 vs rosetta2 node and the rosetta2+node is significantly faster, suggested the instruction set is not the key.
[ Parent | on HN ]