temp path options and reduced scanning of target folder (#328)

- Feature: zen: `--zen-folder-path` added to `builds` command, `list`, `upload`, `download`, `fetch-blob`, `validate-part` to control where `.zen` folder is placed and named
- Improvement: Only check known files from remote state when downloading to a target folder with no local state file
- Improvement: Don't move existing local to cache and back if they are untouched

1 files changed, 16 insertions, 2 deletions

diff --git a/src/zenutil/chunkedcontent.cpp b/src/zenutil/chunkedcontent.cpp
index bb1ee5183..1e8447a57 100644
--- a/src/zenutil/chunkedcontent.cpp
+++ b/src/zenutil/chunkedcontent.cpp
@@ -304,14 +304,22 @@ FolderContent
 GetUpdatedContent(const FolderContent& Old, const FolderContent& New, std::vector<std::filesystem::path>& OutDeletedPathIndexes)
 {
 	ZEN_TRACE_CPU("FolderContent::GetUpdatedContent");
-	FolderContent						  Result = {.Platform = Old.Platform};
+
+	const uint32_t NewPathCount = gsl::narrow<uint32_t>(New.Paths.size());
+
+	FolderContent Result = {.Platform = Old.Platform};
+	Result.Paths.reserve(NewPathCount);
+	Result.RawSizes.reserve(NewPathCount);
+	Result.Attributes.reserve(NewPathCount);
+	Result.ModificationTicks.reserve(NewPathCount);
+
 	tsl::robin_map<std::string, uint32_t> NewPathToIndex;
-	const uint32_t						  NewPathCount = gsl::narrow<uint32_t>(New.Paths.size());
 	NewPathToIndex.reserve(NewPathCount);
 	for (uint32_t NewPathIndex = 0; NewPathIndex < NewPathCount; NewPathIndex++)
 	{
 		NewPathToIndex.insert({New.Paths[NewPathIndex].generic_string(), NewPathIndex});
 	}
+
 	uint32_t OldPathCount = gsl::narrow<uint32_t>(Old.Paths.size());
 	for (uint32_t OldPathIndex = 0; OldPathIndex < OldPathCount; OldPathIndex++)
 	{
@@ -667,6 +675,12 @@ DeletePathsFromChunkedContent(const ChunkedFolderContent& BaseContent, std::span
 		const ChunkedContentLookup						 BaseLookup = BuildChunkedContentLookup(BaseContent);
 		tsl::robin_map<IoHash, uint32_t, IoHash::Hasher> ChunkHashToChunkIndex;
 
+		const size_t ExpectedCount = BaseContent.Paths.size() - DeletedPaths.size();
+		Result.Paths.reserve(ExpectedCount);
+		Result.RawSizes.reserve(ExpectedCount);
+		Result.Attributes.reserve(ExpectedCount);
+		Result.RawHashes.reserve(ExpectedCount);
+
 		tsl::robin_map<IoHash, uint32_t, IoHash::Hasher> RawHashToSequenceRawHashIndex;
 		for (uint32_t PathIndex = 0; PathIndex < BaseContent.Paths.size(); PathIndex++)
 		{