Jose (1.delete@this.2.com) on September 18, 2020 1:24 am wrote:
> Doug S (foo.delete@this.bar.bar) on September 17, 2020 10:36 pm wrote:
> > anon (anon.delete@this.anon.com) on September 17, 2020 7:10 pm wrote:
> > > AnandTech's (SPEC ST performance) review is here: anandtech.com/show/16084/intel-tiger-lake-review-deep-dive-core-11th-gen/8
> > >
> > > All of TigerLake's extra performance over IceLake is due to higher clocks. And it significantly
> > > outperforms the Zen 2 based AMD Renoir chip (Ryzen 7 4800U). However not all is good: TigerLake
> > > experiences a noticeable IPC regression compared to IceLake. The memory subsystem is unable
> > > to keep up with the higher clocks, and the reworked cache is not enough.
> > >
> > > And it just barely beats Apple's A13 despite using significantly more power.
> > > Makes you think the A14 based Mac coming later this year will blow past Intel's
> > > best CPU microarchitecture in single threaded integer performance.
> >
> >
> > Going back what Apple stated about A14 being 40% faster than A12, A14 should be about 16% faster than A13.
> > Add 16% to the A13 scores and it easily beats those Tiger Lake numbers in SPEC2006, for both int and fp.
> >
> > That doesn't even include the bigger caches and wider memory that the A14X will get, nevermind
> > if they have something even better than A14X in store for that Macs arriving later this year.
> I always have my doubts with benchmark numbers under different operating systems.
> How can we compare SPEC/Geekbench etc numbers in iOS vs Windows?
>

Because the OS is irrelevant. There's no system calls in either SPEC or GeekBench, you're just running binary code on the CPU.

The only valid concern is compiler differences between Apple's Xcode LLVM toolchain vs the public Clang toolchains, and I've been told by industry people the differences are minor.