From 7045fe7e2a308f2654aa3fea238b831a27172d88 Mon Sep 17 00:00:00 2001
From: Jan Verbeek <jan.verbeek@posteo.nl>
Date: Fri, 29 Jan 2021 18:48:21 +0100
Subject: [PATCH] Use borrowed instead of owned string arguments

This seems to speed it up about 10% because it avoids copying the
strings.
---
 src/lib.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 1fd8ef6..cfd64a9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,9 +15,9 @@ fn init_mod(_py: Python, m: &PyModule) -> PyResult<()> {
     // We fill this module with everything we want to make visible from Python.
 
     #[pyfn(m, "parse")]
-    fn parse(_py: Python, str_datetime: String, fmt: String) -> PyResult<&PyDateTime> {
+    fn parse<'a>(_py: Python<'a>, str_datetime: &str, fmt: &str) -> PyResult<&'a PyDateTime> {
         // Call chrono and ask it to parse the datetime for us
-        let chrono_dt = Utc.datetime_from_str(str_datetime.as_str(), fmt.as_str());
+        let chrono_dt = Utc.datetime_from_str(str_datetime, fmt);
 
         // In case chrono couldn't parse a datetime, raise a ValueError with chrono's error message.
         // Because there are no exceptions in Rust, we return a PyValueError instance here.