validate & py: replace clone with take in hot loop to minimize al…

…locations

src/cmd/python.rs

@@ -256,7 +256,7 @@ pub fn run(argv: &[&str]) -> CliResult<()> {
             match rdr.read_record(&mut batch_record) {
                 Ok(has_data) => {
                     if has_data {
-                        batch.push(batch_record.clone());
+                        batch.push(std::mem::take(&mut batch_record));
                     } else {
                         // nothing else to add to batch
                         break;

src/cmd/validate.rs

@@ -487,7 +487,7 @@ pub fn run(argv: &[&str]) -> CliResult<()> {
                         if flag_trim {
                             record.trim();
                         }
-                        batch.push(record.clone());
+                        batch.push(std::mem::take(&mut record));
                     } else {
                         // nothing else to add to batch
                         break;