rustc: Set release mode cgus to 16 by default #46910
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r? @estebank (rust_highfive has picked a reviewer for you, use r? to override) |
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@bors r+ Let's try it. We can easily revert before the next release if there's a major problem. |
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📌 Commit 24834eb has been approved by |
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…haelwoerister rustc: Set release mode cgus to 16 by default This commit is the next attempt to enable multiple codegen units by default in release mode, getting some of those sweet, sweet parallelism wins by running codegen in parallel. Performance should not be lost due to ThinLTO being on by default as well. Closes rust-lang#45320
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…haelwoerister rustc: Set release mode cgus to 16 by default This commit is the next attempt to enable multiple codegen units by default in release mode, getting some of those sweet, sweet parallelism wins by running codegen in parallel. Performance should not be lost due to ThinLTO being on by default as well. Closes rust-lang#45320
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I've opened an LLVM bug for that failure. |
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This commit is the next attempt to enable multiple codegen units by default in release mode, getting some of those sweet, sweet parallelism wins by running codegen in parallel. Performance should not be lost due to ThinLTO being on by default as well. Closes rust-lang#45320
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@bors: r=michaelwoerister |
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📌 Commit b5361d0 has been approved by |
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rustc: Set release mode cgus to 16 by default This commit is the next attempt to enable multiple codegen units by default in release mode, getting some of those sweet, sweet parallelism wins by running codegen in parallel. Performance should not be lost due to ThinLTO being on by default as well. Closes #45320
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☀️ Test successful - status-appveyor, status-travis |
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Probably because of this I am seeing nearly halved compilation times. (But I am seeing a problem I'll file soon, I don't know if it's the same LLVM failure reported above. Edit: it's #47015 ). |
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This commit is the next attempt to enable multiple codegen units by default in
release mode, getting some of those sweet, sweet parallelism wins by running
codegen in parallel. Performance should not be lost due to ThinLTO being on by
default as well.
Closes #45320