use hPutStream for lazy hPutStr

src/Data/Text/Lazy/IO.hs

@@ -48,8 +48,9 @@ import qualified Data.Text.Lazy as L
 import qualified Control.Exception as E
 import Control.Monad (when)
 import Data.IORef (readIORef)
-import Data.Text.Internal.IO (hGetLineWith, readChunk)
+import Data.Text.Internal.IO (hGetLineWith, readChunk, hPutStream)
 import Data.Text.Internal.Lazy (Text(..), chunk, empty)
+import Data.Text.Internal.Lazy.Fusion (stream)
 import GHC.IO.Buffer (isEmptyBuffer)
 import GHC.IO.Exception (IOException(..), IOErrorType(..), ioException)
 import GHC.IO.Handle.Internals (augmentIOError, hClose_help,
@@ -129,13 +130,13 @@ hGetLine = hGetLineWith L.fromChunks
 
 -- | Write a string to a handle.
 hPutStr :: Handle -> Text -> IO ()
-hPutStr h = mapM_ (T.hPutStr h) . L.toChunks
+hPutStr h = hPutStream h . stream
 
 -- | Write a string to a handle, followed by a newline.
 hPutStrLn :: Handle -> Text -> IO ()
 hPutStrLn h Empty = hPutChar h '\n'
 hPutStrLn h (Chunk t Empty) = T.hPutStrLn h t  -- print the newline after the last chunk atomically
-hPutStrLn h (Chunk t ts) = T.hPutStr h t >> hPutStrLn h ts
+hPutStrLn h t = hPutStream h (stream t) >> hPutChar h '\n'
 
 -- | The 'interact' function takes a function of type @Text -> Text@
 -- as its argument. The entire input from the standard input device is