main excludes checked with the defaults' case and fold; Latin-1 decoding memory; hardlink election documented

1 files changed, 7 insertions, 5 deletions

diff --git a/internal/extract/plain.go b/internal/extract/plain.go
index 3f04c7e..ce9dedc 100644
--- a/internal/extract/plain.go
+++ b/internal/extract/plain.go
@@ -142,13 +142,15 @@ func decodeUTF16(b []byte, order binary.ByteOrder) string {
 }
 
 // decodeLatin1 decodes b as Latin-1: each byte is its own Unicode code
-// point.
+// point. Built directly as UTF-8 (at most two bytes per input byte), not
+// through a []rune of four bytes per input byte (triage 28d).
 func decodeLatin1(b []byte) string {
-	r := make([]rune, len(b))
-	for i, c := range b {
-		r[i] = rune(c)
+	var s strings.Builder
+	s.Grow(len(b) * 2)
+	for _, c := range b {
+		s.WriteRune(rune(c))
 	}
-	return string(r)
+	return s.String()
 }
 
 // stripMarkup turns decoded HTML/XML/SVG text into plain text: a small