From 08f71c29ea586f41d0ec3ba77f2366c41e861354 Mon Sep 17 00:00:00 2001 From: Gregory Maxwell Date: Tue, 8 Aug 2017 22:51:40 +0000 Subject: [PATCH] [Trivial] Add a comment on the use of prevector in script. --- src/script/script.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/script/script.h b/src/script/script.h index d16bfd0e00e..68b12c1435b 100644 --- a/src/script/script.h +++ b/src/script/script.h @@ -377,6 +377,12 @@ private: int64_t m_value; }; +/** + * We use a prevector for the script to reduce the considerable memory overhead + * of vectors in cases where they normally contain a small number of small elements. + * Tests in October 2015 showed use of this reduced dbcache memory usage by 23% + * and made an initial sync 13% faster. + */ typedef prevector<28, unsigned char> CScriptBase; /** Serialized script, used inside transaction inputs and outputs */