• @[email protected]
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    08 hours ago

    Not like Ubuntu works very well on old hardware but hopefully O2 support will still be there. Many people need it.

    • @ozymandias117
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      26 hours ago

      -O2 vs -O3 adds -fgcse-after-reload -fipa-cp-clone -floop-interchange -floop-unroll-and-jam -fpeel-loops -fpredictive-commoning -fsplit-loops -fsplit-paths -ftree-loop-distribution -ftree-partial-pre -funswitch-loops -fvect-cost-model=dynamic -fversion-loops-for-strides

      I don’t think any of these optimizations require more modern hardware?

      • @[email protected]
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        25 hours ago

        Right. GCC -f optimizations are basically like “how hard are we going to try to be clever” and are, I believe, orthogonal to the actual instructions used. Machine dependent args start with -m, like -march or -mavx etc.

        • @ozymandias117
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          15 hours ago

          I was reasonably certain, but left it open in case OP knew of some edge case where flags that are intended to be machine independent caused bugs on different architectures