small performance improvements0.12.1

For the most part, this switches write_record to write_byte_record where
possible, and also moves some uses of the `byte_records` iterator to the
manual `read_byte_record` method, which permits us to amortize
allocation.

This also removes the use of normal selection for `xsv search`, which
was causing a huge slow down.

Also, bump to csv 1.0.0.beta.3.

1 files changed, 6 insertions, 3 deletions

diff --git a/src/main.rs b/src/main.rs
index ca0f5ce..f0d4d81 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -216,9 +216,12 @@ impl From<docopt::Error> for CliError {
 
 impl From<csv::Error> for CliError {
     fn from(err: csv::Error) -> CliError {
-        match err {
-            csv::Error::Io(v) => From::from(v),
-            v => CliError::Csv(v),
+        if !err.is_io_error() {
+            return CliError::Csv(err);
+        }
+        match err.into_kind() {
+            csv::ErrorKind::Io(v) => From::from(v),
+            _ => unreachable!(),
         }
     }
 }