6817442ec7
The `Lrc` is only relevant within `transcribe()`. There, the `Lrc` is helpful for the non-`NtTT` cases, because the entire nonterminal is cloned. But for the `NtTT` cases the inner token tree is cloned (a full clone) and so the `Lrc` is of no help. This commit splits the `NtTT` and non-`NtTT` cases, avoiding the useless `Lrc` in the former case, for the following effect on macro-heavy crates. - It reduces the total number of allocations a lot. - It increases the size of some of the remaining allocations. - It doesn't affect *peak* memory usage, because the larger allocations are short-lived. This overall gives a speed win. |
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| Cargo.toml | ||