video scrub and pip preview thumbnail update should be instantaneous

[dabbadoo]

Not sure if this is by design or due to bitrate, but in DJV 2.0.8, when scrubbing quickly through the timeline, the main vision doesn't update until the scrubbing pauses, though the timecode numerical display updates instantaneously. Only when scrubbing very, very slowly, the update is instantaneous. The pip preview thumbnail over the timeline also doesn't update until the mouse movement stops, nor does the pip preview thumbnail's timecode display. It'd be nicer if all of it was more instantaneous, as in other file players (Quicktime, KMPlayer, PotPlayer, KeyframeMP with or without GPU accelleration), YouTube, Vimeo, etc.

Win 64, MP4 H264 video file, 1280x720p, 29 secs, 25fps, 745kbps.

[dabbadoo]

Log file attached

djv-log.txt