openpgp: Avoid unnecessary allocations.

  - It's enough to clear the vector and reuse the existing memory.

1 files changed, 3 insertions, 3 deletions

diff --git a/openpgp/src/armor.rs b/openpgp/src/armor.rs
index 925d04a5..85a0a967 100644
--- a/openpgp/src/armor.rs
+++ b/openpgp/src/armor.rs
@@ -610,7 +610,7 @@ impl<'a> Reader<'a> {
             if lines > 0 {
                 // Find the start of the next line.
                 self.source.drop_through(&[b'\n'], true)?;
-                prefix = Vec::new();
+                prefix.clear();
             }
             lines += 1;
 
@@ -626,7 +626,7 @@ impl<'a> Reader<'a> {
                 let c = self.source.data(1)?[0];
                 if c == b'\n' {
                     // We found a newline while walking whitespace, reset prefix
-                    prefix = Vec::new();
+                    prefix.clear();
                 } else {
                     prefix.push(self.source.data_hard(1)?[0]);
                 }
@@ -715,7 +715,7 @@ impl<'a> Reader<'a> {
             // was purely whitespace.  Any non-whitespace remains an error
             // while searching for the armor header if it's not repeated.
             if prefix.iter().all(|b| (*b as char).is_ascii_whitespace()) {
-                prefix = Vec::new();
+                prefix.clear();
             } else {
                 // Nope, we have actually failed to read this properly
                 return Err(