buffer swap optimization on type inference - #23341
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CosmicalBit
marked this pull request as ready for review
September 10, 2026 10:47
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First, we're about to share this code with rustc, so we won't change it. Second, the entire point is to reuse the allocation. Also the N here is usually small. |
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Thank you for your interest in contributing anyway! |
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Thanks 👍 |
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Avoids moving pending obligations element by element into the scratch buffer. Swaps the two Vecs instead, turning the transfer from O(n) into O(1).