reserve space for log entries before replay

1 files changed, 5 insertions, 0 deletions

diff --git a/zenstore/compactcas.cpp b/zenstore/compactcas.cpp
index 1dd1a3906..1ade002d8 100644
--- a/zenstore/compactcas.cpp
+++ b/zenstore/compactcas.cpp
@@ -282,6 +282,7 @@ namespace {
 			CasLog.Open(SlogPath, CasLogFile::EMode::kRead);
 			if (CasLog.Initialize())
 			{
+				Entries.reserve(CasLog.GetLogCount());
 				CasLog.Replay([&](const CasDiskIndexEntry& Record) { Entries.push_back(Record); });
 			}
 		}
@@ -359,6 +360,7 @@ namespace {
 			});
 			if (LegacyCasLog.Initialize())
 			{
+				LegacyDiskIndex.reserve(LegacyCasLog.GetLogCount());
 				LegacyCasLog.Replay([&](const LegacyCasDiskIndexEntry& Record) {
 					std::string InvalidEntryReason;
 					if (Record.Flags & LegacyCasDiskIndexEntry::kTombstone)
@@ -1410,9 +1412,11 @@ CasContainerStrategy::MakeIndexSnapshot()
 			{
 				TCasLogFile<CasDiskIndexEntry> OldCasLog;
 				OldCasLog.Open(STmplogPath, CasLogFile::EMode::kRead);
+				Records.reserve(OldCasLog.GetLogCount());
 				OldCasLog.Replay([&](const CasDiskIndexEntry& Record) { Records.push_back(Record); });
 			}
 			{
+				Records.reserve(Records.size() + m_CasLog.GetLogCount());
 				m_CasLog.Replay([&](const CasDiskIndexEntry& Record) { Records.push_back(Record); });
 			}
 
@@ -2316,6 +2320,7 @@ TEST_CASE("compactcas.legacyconversion")
 	{
 		TCasLogFile<CasDiskIndexEntry> CasLog;
 		CasLog.Open(SlogPath, CasLogFile::EMode::kRead);
+		LogEntries.reserve(CasLog.GetLogCount());
 		CasLog.Replay([&](const CasDiskIndexEntry& Record) { LogEntries.push_back(Record); });
 	}
 	TCasLogFile<LegacyCasDiskIndexEntry> LegacyCasLog;