Enable full LTO #1319
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Enable full LTO #1319
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The overhead doesn’t change much. My results were mostly because of target-cpu + fat LTO + rebuilding std/alloc/core with them (but I wasn’t clear enough that I was mostly looking at rust codegen on x64-v1 vs v3, not at the C version — just to have some ideas of achievable limits. We also looked at PGO to see some theoretical limits, but that’s of course not applicable in practice here :) |
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In my measurements this was a very small, if anything, speedup. I'll measure more carefully and post numbers. |
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This is a 0.2% speedup on my Ryzen 7700X. It's consistent and slightly above measurement noise, with only a small increase in build time. I'm going to put this in. |
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