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<div dir="auto">Found a nice blog post explaining why M1 is
fast. </div>
<div><a
href="https://debugger.medium.com/why-is-apples-m1-chip-so-fast-3262b158cba2"
moz-do-not-send="true">https://debugger.medium.com/why-is-apples-m1-chip-so-fast-3262b158cba2</a></div>
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<p>I knew it! I felt it all my life! It takes insurmountable amount
of time to prepare place for painting, more than painting itself
takes. ... Eight preppers of micro-ops in M1 versus four in
Intel/AMD.<br>
</p>
<p>I still have feeling that co-locating memory also helps preppers'
result, besides the benefit of RISC's constant length of
instruction.</p>
<p>It also explains talks of AMD going with ARM. RISC-y business :)<br>
</p>
<blockquote type="cite"
cite="mid:CA+LEaarowbDGr6vMo2oN-sKqhe7PB_RWX1LHahZ2ZGwcw99gLg@mail.gmail.com">
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<div>Rust provides both Atomic Reference Counting (called
Arc) and non-atomic Reference Counting (called Rc). You
choose the one that makes sense. Hopefully the type
system complains if you use Rc in a context where
atomicity is required, but I don't use Rust. C++
provides only atomic refcounting in the standard
library; for the other kind you roll your own (which I
have done).<br>
<blockquote type="cite" id="m_816261540811853656qt">
<p><moving into discussing silicon and near it><br>
</p>
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<div>Another trick is that Apple's dev languages and
frameworks (Swift and Objective-C) use reference
counting, which requires atomic increments and
decrements. On Intel, these operations are five
times slower than non-atomic operations; on Apple
Silicon they run at the same speed. This is
something I wish the other CPU vendors would get
right, because refcounting has some technical
advantages over tracing GC, and I use it in
software I write. C++ and Rust, both "performance"
languages, provide refcounting but not tracing GC.<br>
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id="m_816261540811853656qt-qt">
<div>Regarding M1. My Understanding is that
placement of RAM inside of processor
package/silicon is the trick that makes it run
fast. Is there anything else?<br>
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<div> <br>
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<div dir="ltr"> The Apple M1 looks decent, but
since Apple no longer lets you run Linux on
their hardware, I have no desire to ever buy
one.<br>
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<div>Does Rust standard refcounting, or implementation
of such pointers need to use atomic in/decrements?
Can't it use non-atomic something, given a more
detailed knowledge of ownership? Just wondering.<br>
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<div class="moz-signature">-- <br>
Mikalai Birukou <br>
CEO | 3NSoft Inc.</div>
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