Optimise Chars::last() #37882
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Optimise Chars::last() #37882
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The default implementation of last() goes through the entire iterator but that's not needed here.
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r? @aturon (rust_highfive has picked a reviewer for you, use r? to override) |
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@bors r+ rollup Thank you! |
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📌 Commit de2f617 has been approved by |
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By the way, this applies to char_indices as well. Another commit or another PR is welcome. |
The default implementation of last() goes through the entire iterator but that's not needed here.
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Good point. I've applied the same to |
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@bors r+ rollup |
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📌 Commit 9e86e18 has been approved by |
GuillaumeGomez
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Nov 20, 2016
Optimise Chars::last() The default implementation of last() goes through the entire iterator but that's not needed here.
bors
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that referenced
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Nov 20, 2016
brson
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relnotes
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Shouldn't this apply to any |
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Yeah, but I think it might be breaking change to do this for iterators that might have side effects. |
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Yes. Iterator::last's doc is specific about how it goes about finding the last value (traversing it all). |
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The default implementation of last() goes through the entire iterator
but that's not needed here.