Rate limit console progress display updates to 10 per second. Was updating as frequently as changes were reported, up to hundreds of times per second, which used unncessary bandwidth when running git-annex over ssh etc.

Messages/Progress.hs

@@ -30,7 +30,7 @@ import Data.Quantity
 {- Shows a progress meter while performing a transfer of a key.
  - The action is passed a callback to use to update the meter. -}
 metered :: Maybe MeterUpdate -> Key -> (MeterUpdate -> Annex a) -> Annex a
-metered combinemeterupdate key a = case keySize key of
+metered othermeter key a = case keySize key of
 	Nothing -> nometer
 	Just size -> withOutputType (go $ fromInteger size)
   where
@@ -39,21 +39,21 @@ metered combinemeterupdate key a = case keySize key of
 	go size NormalOutput = do
 		showOutput
 		(progress, meter) <- mkmeter size
-		r <- a $ \n -> liftIO $ do
+		m <- liftIO $ rateLimitMeterUpdate 0.1 (Just size) $ \n -> do
 			setP progress $ fromBytesProcessed n
 			displayMeter stdout meter
-			maybe noop (\m -> m n) combinemeterupdate
+		r <- a (combinemeter m)
 		liftIO $ clearMeter stdout meter
 		return r
 #if WITH_CONCURRENTOUTPUT
 	go size o@(ConcurrentOutput {})
 		| concurrentOutputEnabled o = withProgressRegion $ \r -> do
 			(progress, meter) <- mkmeter size
-			a $ \n -> liftIO $ do
+			m <- liftIO $ rateLimitMeterUpdate 0.1 (Just size) $ \n -> do
 				setP progress $ fromBytesProcessed n
 				s <- renderMeter meter
 				Regions.setConsoleRegion r ("\n" ++ s)
-				maybe noop (\m -> m n) combinemeterupdate
+			a (combinemeter m)
 #else
 	go _size _o
 #endif
@@ -66,6 +66,10 @@ metered combinemeterupdate key a = case keySize key of
 
 	nometer = a (const noop)
 
+	combinemeter m = case othermeter of
+		Nothing -> m
+		Just om -> combineMeterUpdate m om
+
 {- Use when the progress meter is only desired for concurrent
  - output; as when a command's own progress output is preferred. -}
 concurrentMetered :: Maybe MeterUpdate -> Key -> (MeterUpdate -> Annex a) -> Annex a