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-rw-r--r--src/util/hex.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/util/hex.h b/src/util/hex.h
index df22539a5..31bcaa2ba 100644
--- a/src/util/hex.h
+++ b/src/util/hex.h
@@ -26,6 +26,8 @@ static const char hex_chars[] = "0123456789abcdef";
static inline std::string hex_encode(const char *data, unsigned int data_size)
{
std::string ret;
+ ret.reserve(data_size * 2);
+
char buf2[3];
buf2[2] = '\0';