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142 points chmaynard | 1 comments | 31 Oct 24 10:45 UTC | HN request time: 0.001s | source

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OnlyMortal ◴[06 Nov 24 18:00 UTC] No.42066401[source]▶

Back in the day on the Mac, the order of source files in your project would determine locality in the binary.

If memory serves, this was with MPW C or maybe CodeWarrior.

You could see the jump (jmp) instructions use short jumps rather than long ones.

1. Iwan-Zotow ◴[07 Nov 24 01:03 UTC] No.42072091[source]▶

same in MS DOS

you have far and near pointers modifiers

Kernel optimization with BOLT (binary optimization and layout tool)