[Bug 741987] videoscale performance regression

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=741987
  GStreamer | gst-plugins-base | git

--- Comment #1 from Nicola <lists at svrinformatica.it> 2014-12-30 16:12:33 UTC ---
another test, I saved some raw buffers inside an mkv file with a pipeline like
this:

gst-launch-1.0 v4l2src num-buffers=1000 ! video/x-raw ! matroskamux ! filesink
location=/tmp/test.mkv

git master:

gst-launch-1.0 filesrc location= /tmp/test.mkv ! matroskademux ! queue !
videoscale ! video/x-raw,width=320,height=240 ! fakesink sync=false
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
Got EOS from element "pipeline0".
Execution ended after 0:00:01.401361272
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...

1.4.5:

gst-launch-1.0 filesrc location= /tmp/test.mkv ! matroskademux ! queue !
videoscale ! video/x-raw,width=320,height=240 ! fakesink sync=false
Impostazione della pipeline a PAUSED ...
La pipeline è in PREROLLING ...
La pipeline è in PREROLLED ...
Impostazione della pipeline a PLAYING ...
New clock: GstSystemClock
Ottenuto EOS dall'elemento «pipeline0».
Execution ended after 0:00:00.521376775
Impostazione della pipeline a PAUSED ...
Impostazione della pipeline a READY ...
Impostazione della pipeline a NULL ...
Esecuzione di free sulla pipeline...

in this case the difference seems even bigger: 0.5 seconds vs 1.4

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