From 25a9426221426a8c434214749d3dd9e409c7df5e Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@bug.st>
Date: Tue, 29 Jun 2021 16:40:56 +0200
Subject: [PATCH] Move regex compile outside loop

---
 serial_unix.go | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/serial_unix.go b/serial_unix.go
index f9e887c..e4dad89 100644
--- a/serial_unix.go
+++ b/serial_unix.go
@@ -220,6 +220,10 @@ func nativeGetPortsList() ([]string, error) {
 	}
 
 	ports := make([]string, 0, len(files))
+	regex, err := regexp.Compile(regexFilter)
+	if err != nil {
+		return nil, err
+	}
 	for _, f := range files {
 		// Skip folders
 		if f.IsDir() {
@@ -227,11 +231,7 @@ func nativeGetPortsList() ([]string, error) {
 		}
 
 		// Keep only devices with the correct name
-		match, err := regexp.MatchString(regexFilter, f.Name())
-		if err != nil {
-			return nil, err
-		}
-		if !match {
+		if !regex.MatchString(f.Name()) {
 			continue
 		}