Add read_to_end implementation to &[u8]'s Read impl
The default impl for read_to_end does a bunch of bookkeeping that isn't necessary for slices and is about 4 times slower on my machine.
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@ -206,6 +206,14 @@ impl<'a> Read for &'a [u8] {
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*self = b;
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Ok(())
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}
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#[inline]
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fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
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buf.extend_from_slice(*self);
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let len = self.len();
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*self = &self[len..];
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Ok(len)
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}
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}
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#[stable(feature = "rust1", since = "1.0.0")]
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