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by pcwalton
1944 days ago
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Not true. This is a common myth that comes from some old Linus posts in the 32-bit Pentium 4 days and still won't die. I've done comparisons to test this. Compare sizes of modern x86-64 Linux binaries to their counterparts on AArch64. You'll find that they're extremely close. The biggest problem is all the REX prefixes. The inefficient encoding of registers in x86-64 squandered all the advantages that x86 had. |
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> > x86 generally has an advantage [empahsis added, not "x86-64"]
Obviously if you take the worst of both worlds (bloated and variable-width instructions), you can squander that advantage, but the advantage is in fact real.