diff --git a/src/HSFM/FileSystem/FileOperations.hs b/src/HSFM/FileSystem/FileOperations.hs
index 04ef817..3afe1ae 100644
--- a/src/HSFM/FileSystem/FileOperations.hs
+++ b/src/HSFM/FileSystem/FileOperations.hs
@@ -331,8 +331,10 @@ copyFile cm from@(_ :/ RegFile {}) to@(_ :/ Dir {}) fn
 copyFile _ _ _ _ = throw $ InvalidOperation "wrong input type"
 
 
--- |Unsafe version of `copyFile` without initial sanity checks. Thise
+-- |Unsafe version of `copyFile` without initial sanity checks. This
 -- holds the actual copy logic though and is called by `copyFile` in the end.
+-- It's also used for cases where we don't need/want sanity checks
+-- and need the extra bit of performance.
 unsafeCopyFile :: CopyMode
                -> AnchoredFile a  -- ^ source file
                -> AnchoredFile a  -- ^ destination dir
diff --git a/src/HSFM/FileSystem/FileType.hs b/src/HSFM/FileSystem/FileType.hs
index 5d7ea46..63eb129 100644
--- a/src/HSFM/FileSystem/FileType.hs
+++ b/src/HSFM/FileSystem/FileType.hs
@@ -389,6 +389,9 @@ readFile ff p = do
   readFileUnsafe ff (cdp P.</> P.basename p)
 
 
+-- |A variant of `readFile` which does not use `realpath` at all.
+-- Suitable for cases where we know the paths are safe/correct
+-- and need the extra bit of performance.
 readFileUnsafe :: (Path Abs -> IO a)
                -> Path Abs
                -> IO (AnchoredFile a)
@@ -442,6 +445,9 @@ readDirectoryContents getfiles ff p = do
   return $ removeNonexistent fcs
 
 
+-- |A variant of `readDirectoryContents` which uses `readFileUnsafe`.
+-- Suitable for cases where we know the paths are safe/correct
+-- and need the extra bit of performance.
 readDirectoryContentsUnsafe :: (Path Abs -> IO [Path Fn])
                             -> (Path Abs -> IO a)
                             -> Path Abs