Merge pull request #454 from CosminPerRam/feat/reduce_crc_sum_calls

feat: reduce CrcReader::sum calls in GzEncoder::read_footer

Author: Byron

src/gz/bufread.rs

@@ -80,17 +80,18 @@ impl<R: BufRead> GzEncoder<R> {
             return Ok(0);
         }
         let crc = self.inner.get_ref().crc();
-        let ref arr = [
-            (crc.sum() >> 0) as u8,
-            (crc.sum() >> 8) as u8,
-            (crc.sum() >> 16) as u8,
-            (crc.sum() >> 24) as u8,
+        let calced_crc_bytes = crc.sum().to_le_bytes();
+        let arr = [
+            calced_crc_bytes[0],
+            calced_crc_bytes[1],
+            calced_crc_bytes[2],
+            calced_crc_bytes[3],
             (crc.amount() >> 0) as u8,
             (crc.amount() >> 8) as u8,
             (crc.amount() >> 16) as u8,
             (crc.amount() >> 24) as u8,
         ];
-        Ok(copy(into, arr, &mut self.pos))
+        Ok(copy(into, &arr, &mut self.pos))
     }
 }