(resend as plain text) Hi all, It seems both pulseaudio alsa PCM plugin (source) and gstreamer pulsesrc consume much more CPU resource than alsa when working on the same sample (rate, channel and format). I had a rough look at the source code and found they both use the threaded mainloop model. Can we have any chance to optimize for this? $ arecord -Dhw:0,0 -c 2 -f S32_LE test.wav CPU% = 1~2% $ arecord -c 2 -f S32_LE test.wav CPU% = 15~18% (default device is pulseaudio PCM plugin) $ gst-launch alsasrc device="hw:0,0" ! queue ! audioconvert ! wavenc ! filesink location=test.wav CPU% = 2~3% $ gst-launch pulsesrc ! queue ! audioconvert ! wavenc ! filesink location=test.wav CPU% = 12~14% Thanks, Bin
