diff --git a/libtransmission/announcer.cc b/libtransmission/announcer.cc
index b1517fbf5..580b455bf 100644
--- a/libtransmission/announcer.cc
+++ b/libtransmission/announcer.cc
@@ -419,7 +419,7 @@ struct tr_tier
         return currentTracker();
     }
 
-    [[nodiscard]] std::optional<size_t> indexOf(tr_interned_string const& announce_url) const
+    [[nodiscard]] std::optional<size_t> indexOf(tr_interned_string announce_url) const
     {
         for (size_t i = 0, n = std::size(trackers); i < n; ++i)
         {
@@ -579,7 +579,7 @@ struct tr_torrent_announcer
         return nullptr;
     }
 
-    tr_tier* getTierFromScrape(tr_interned_string const& scrape_url)
+    tr_tier* getTierFromScrape(tr_interned_string scrape_url)
     {
         for (auto& tier : tiers)
         {
@@ -600,7 +600,7 @@ struct tr_torrent_announcer
     }
 
     [[nodiscard]] bool findTracker(
-        tr_interned_string const& announce_url,
+        tr_interned_string announce_url,
         tr_tier const** setme_tier,
         tr_tracker const** setme_tracker) const
     {
diff --git a/libtransmission/cache.cc b/libtransmission/cache.cc
index ab73f0cd4..47d06441e 100644
--- a/libtransmission/cache.cc
+++ b/libtransmission/cache.cc
@@ -161,7 +161,7 @@ int Cache::writeBlock(tr_torrent_id_t tor_id, tr_block_index_t block, std::uniqu
     return cacheTrim();
 }
 
-Cache::CIter Cache::getBlock(tr_torrent const* torrent, tr_block_info::Location loc) noexcept
+Cache::CIter Cache::getBlock(tr_torrent const* torrent, tr_block_info::Location const& loc) noexcept
 {
     if (auto const [begin, end] = std::equal_range(
             std::begin(blocks_),
@@ -176,7 +176,7 @@ Cache::CIter Cache::getBlock(tr_torrent const* torrent, tr_block_info::Location
     return std::end(blocks_);
 }
 
-int Cache::readBlock(tr_torrent* torrent, tr_block_info::Location loc, uint32_t len, uint8_t* setme)
+int Cache::readBlock(tr_torrent* torrent, tr_block_info::Location const& loc, uint32_t len, uint8_t* setme)
 {
     if (auto const iter = getBlock(torrent, loc); iter != std::end(blocks_))
     {
@@ -187,7 +187,7 @@ int Cache::readBlock(tr_torrent* torrent, tr_block_info::Location loc, uint32_t
     return tr_ioRead(torrent, loc, len, setme);
 }
 
-int Cache::prefetchBlock(tr_torrent* torrent, tr_block_info::Location loc, uint32_t len)
+int Cache::prefetchBlock(tr_torrent* torrent, tr_block_info::Location const& loc, uint32_t len)
 {
     if (auto const iter = getBlock(torrent, loc); iter != std::end(blocks_))
     {
diff --git a/libtransmission/cache.h b/libtransmission/cache.h
index 9d6455610..255a2780d 100644
--- a/libtransmission/cache.h
+++ b/libtransmission/cache.h
@@ -38,8 +38,8 @@ public:
     // @return any error code from cacheTrim()
     int writeBlock(tr_torrent_id_t tor, tr_block_index_t block, std::unique_ptr<std::vector<uint8_t>> writeme);
 
-    int readBlock(tr_torrent* torrent, tr_block_info::Location loc, uint32_t len, uint8_t* setme);
-    int prefetchBlock(tr_torrent* torrent, tr_block_info::Location loc, uint32_t len);
+    int readBlock(tr_torrent* torrent, tr_block_info::Location const& loc, uint32_t len, uint8_t* setme);
+    int prefetchBlock(tr_torrent* torrent, tr_block_info::Location const& loc, uint32_t len);
     int flushTorrent(tr_torrent const* torrent);
     int flushFile(tr_torrent const* torrent, tr_file_index_t file);
 
@@ -86,7 +86,7 @@ private:
 
     [[nodiscard]] static size_t getMaxBlocks(int64_t max_bytes) noexcept;
 
-    [[nodiscard]] CIter getBlock(tr_torrent const* torrent, tr_block_info::Location loc) noexcept;
+    [[nodiscard]] CIter getBlock(tr_torrent const* torrent, tr_block_info::Location const& loc) noexcept;
 
     tr_torrents& torrents_;
 
diff --git a/libtransmission/inout.cc b/libtransmission/inout.cc
index 8eac8dd1d..9444b9843 100644
--- a/libtransmission/inout.cc
+++ b/libtransmission/inout.cc
@@ -282,17 +282,17 @@ std::optional<tr_sha1_digest_t> recalculateHash(tr_torrent* tor, tr_piece_index_
 
 } // namespace
 
-int tr_ioRead(tr_torrent* tor, tr_block_info::Location loc, size_t len, uint8_t* setme)
+int tr_ioRead(tr_torrent* tor, tr_block_info::Location const& loc, size_t len, uint8_t* setme)
 {
     return readOrWritePiece(tor, IoMode::Read, loc, setme, len);
 }
 
-int tr_ioPrefetch(tr_torrent* tor, tr_block_info::Location loc, size_t len)
+int tr_ioPrefetch(tr_torrent* tor, tr_block_info::Location const& loc, size_t len)
 {
     return readOrWritePiece(tor, IoMode::Prefetch, loc, nullptr, len);
 }
 
-int tr_ioWrite(tr_torrent* tor, tr_block_info::Location loc, size_t len, uint8_t const* writeme)
+int tr_ioWrite(tr_torrent* tor, tr_block_info::Location const& loc, size_t len, uint8_t const* writeme)
 {
     return readOrWritePiece(tor, IoMode::Write, loc, const_cast<uint8_t*>(writeme), len);
 }
diff --git a/libtransmission/inout.h b/libtransmission/inout.h
index 94c9c7237..6034910ca 100644
--- a/libtransmission/inout.h
+++ b/libtransmission/inout.h
@@ -26,15 +26,15 @@ struct tr_torrent;
  * Reads the block specified by the piece index, offset, and length.
  * @return 0 on success, or an errno value on failure.
  */
-[[nodiscard]] int tr_ioRead(struct tr_torrent* tor, tr_block_info::Location loc, size_t len, uint8_t* setme);
+[[nodiscard]] int tr_ioRead(struct tr_torrent* tor, tr_block_info::Location const& loc, size_t len, uint8_t* setme);
 
-int tr_ioPrefetch(tr_torrent* tor, tr_block_info::Location loc, size_t len);
+int tr_ioPrefetch(tr_torrent* tor, tr_block_info::Location const& loc, size_t len);
 
 /**
  * Writes the block specified by the piece index, offset, and length.
  * @return 0 on success, or an errno value on failure.
  */
-[[nodiscard]] int tr_ioWrite(struct tr_torrent* tor, tr_block_info::Location loc, size_t len, uint8_t const* writeme);
+[[nodiscard]] int tr_ioWrite(struct tr_torrent* tor, tr_block_info::Location const& loc, size_t len, uint8_t const* writeme);
 
 /**
  * @brief Test to see if the piece matches its metainfo's SHA1 checksum.
diff --git a/libtransmission/torrent.cc b/libtransmission/torrent.cc
index 80fed1322..45b5a8231 100644
--- a/libtransmission/torrent.cc
+++ b/libtransmission/torrent.cc
@@ -2559,8 +2559,8 @@ void renameTorrentFileString(tr_torrent* tor, std::string_view oldpath, std::str
 
 void torrentRenamePath(
     tr_torrent* const tor,
-    std::string oldpath, // NOLINT performance-unnecessary-value-param
-    std::string newname, // NOLINT performance-unnecessary-value-param
+    std::string const& oldpath, // NOLINT performance-unnecessary-value-param
+    std::string const& newname, // NOLINT performance-unnecessary-value-param
     tr_torrent_rename_done_func callback,
     void* const callback_user_data)
 {