From d22cbe16dd0fefb38fafa5fe216f5ec1f1d83765 Mon Sep 17 00:00:00 2001
From: Paul Querna <pquerna@apache.org>
Date: Sat, 16 Nov 2019 15:05:44 -0800
Subject: [PATCH 1/2] Add benchmark for ParseSigned

---
 signing_test.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/signing_test.go b/signing_test.go
index 5b013648..89b2ed7d 100644
--- a/signing_test.go
+++ b/signing_test.go
@@ -570,3 +570,13 @@ func TestSignerB64(t *testing.T) {
 		t.Errorf("Input/output do not match, got '%s', expected '%s'", output, input)
 	}
 }
+
+func BenchmarkParseSigned(b *testing.B) {
+	msg := `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c`
+	for i := 0; i < b.N; i++ {
+		_, err := ParseSigned(msg)
+		if err != nil {
+			b.Errorf("Error on parse: %s", err)
+		}
+	}
+}
\ No newline at end of file

From 5b063f60741a237bdb50f6484379c935e1beea8a Mon Sep 17 00:00:00 2001
From: Paul Querna <pquerna@apache.org>
Date: Sat, 16 Nov 2019 15:12:04 -0800
Subject: [PATCH 2/2] Use string.Builder to remove whitespace, isntead of a
 regeexp

---
 encoding.go | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/encoding.go b/encoding.go
index b9687c64..70f7385c 100644
--- a/encoding.go
+++ b/encoding.go
@@ -23,13 +23,12 @@ import (
 	"encoding/binary"
 	"io"
 	"math/big"
-	"regexp"
+	"strings"
+	"unicode"
 
 	"gopkg.in/square/go-jose.v2/json"
 )
 
-var stripWhitespaceRegex = regexp.MustCompile("\\s")
-
 // Helper function to serialize known-good objects.
 // Precondition: value is not a nil pointer.
 func mustSerializeJSON(value interface{}) []byte {
@@ -56,7 +55,14 @@ func mustSerializeJSON(value interface{}) []byte {
 
 // Strip all newlines and whitespace
 func stripWhitespace(data string) string {
-	return stripWhitespaceRegex.ReplaceAllString(data, "")
+	buf := strings.Builder{}
+	buf.Grow(len(data))
+	for _, r := range data {
+		if !unicode.IsSpace(r) {
+			buf.WriteRune(r)
+		}
+	}
+	return buf.String()
 }
 
 // Perform compression based on algorithm