Use resize instead of shrink_to_fit

Avoid recalculating significant words which slows down reduction

1 files changed, 7 insertions, 0 deletions

diff --git a/src/lib/math/bigint/bigint.h b/src/lib/math/bigint/bigint.h
index 530fd5ecf..bd63425fd 100644
--- a/src/lib/math/bigint/bigint.h
+++ b/src/lib/math/bigint/bigint.h
@@ -570,6 +570,8 @@ class BOTAN_PUBLIC_API(2,0) BigInt final
         m_data.shrink_to_fit(min_size);
         }
 
+     void resize(size_t s) { m_data.resize(s); }
+
      /**
      * Fill BigInt with a random number with size of bitsize
      *
@@ -910,6 +912,11 @@ class BOTAN_PUBLIC_API(2,0) BigInt final
               m_reg.resize(words);
               }
 
+           void resize(size_t s)
+              {
+              m_reg.resize(s);
+              }
+
            void swap(Data& other)
               {
               m_reg.swap(other.m_reg);