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util: improve streams.h:FindByte() performance

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Avoid use of the expensive mod operator (%) when calculating the
buffer offset. No functional difference.

Co-authored-by: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
This commit is contained in:
Larry Ruane
2020-08-10 15:23:03 -06:00
parent 604df63f6c
commit 72efc26439
5 changed files with 19 additions and 9 deletions
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2
src/validation.cpp
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@@ -4565,7 +4565,7 @@ void Chainstate::LoadExternalBlockFile(
try {
// locate a header
unsigned char buf[CMessageHeader::MESSAGE_START_SIZE];
blkdat.FindByte(params.MessageStart()[0]);
blkdat.FindByte(std::byte(params.MessageStart()[0]));
nRewind = blkdat.GetPos() + 1;
blkdat >> buf;
if (memcmp(buf, params.MessageStart(), CMessageHeader::MESSAGE_START_SIZE)) {