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Android native AudioTrack vs amem performance
By admin | March 11, 2012
VLC for Android pre-alpha benchmarks (March 11, 2012) for two audio outputs. Specs and method are the same as in the audio benchmarks.
Sample
First 30 seconds of testfile.mp3
Results
| amem Mean: 13.24% Median: 11.30% Mode: 10.7% |
Native AudioTrack Mean: 11.87% Median: 10.40% Mode: 10.7% |
amem
PID PPID USER STAT VSZ %MEM CPU %CPU COMMAND Pass 1: D/vlc ( 3253): using audio output module "amem" 3253 957 10076 S 163m 88.3 0 22.7 org.videolan.vlc 3253 957 10076 S 161m 87.2 0 11.5 org.videolan.vlc 3253 957 10076 S 161m 87.2 0 10.7 org.videolan.vlc 3253 957 10076 S 161m 87.2 0 11.9 org.videolan.vlc 3253 957 10076 S 161m 87.2 0 11.3 org.videolan.vlc 3253 957 10076 S 161m 87.2 0 10.2 org.videolan.vlc Pass 2: D/vlc ( 3366): using audio output module "amem" 3366 957 10076 R 164m 88.7 0 23.7 org.videolan.vlc 3366 957 10076 S 161m 87.5 0 11.7 org.videolan.vlc 3366 957 10076 S 161m 87.5 0 11.7 org.videolan.vlc 3366 957 10076 S 161m 87.5 0 10.5 org.videolan.vlc 3366 957 10076 S 161m 87.5 0 11.1 org.videolan.vlc 3366 957 10076 S 161m 87.5 0 10.9 org.videolan.vlc Pass 3: D/vlc ( 3590): using audio output module "amem" 3590 957 10076 S 164m 89.1 0 25.6 org.videolan.vlc 3590 957 10076 S 164m 89.1 0 12.3 org.videolan.vlc 3590 957 10076 S 164m 89.1 0 11.3 org.videolan.vlc 3590 957 10076 S 164m 89.1 0 10.5 org.videolan.vlc 3590 957 10076 S 164m 89.1 0 10.1 org.videolan.vlc 3590 957 10076 S 164m 89.1 0 10.7 org.videolan.vlc
AudioTrack
PID PPID USER STAT VSZ %MEM CPU %CPU COMMAND Pass 1: D/vlc ( 2835): using audio output module "android_audiotrack" 2835 957 10076 S 159m 86.0 0 10.1 org.videolan.vlc 2835 957 10076 S 159m 86.0 0 10.4 org.videolan.vlc 2835 957 10076 S 159m 86.0 0 9.5 org.videolan.vlc 2835 957 10076 S 159m 86.0 0 9.4 org.videolan.vlc 2835 957 10076 S 159m 86.0 0 9.8 org.videolan.vlc 2835 957 10076 S 159m 86.0 0 9.2 org.videolan.vlc Pass 2: D/vlc ( 2948): using audio output module "android_audiotrack" 2948 957 10076 S 165m 89.5 0 23.5 org.videolan.vlc 2948 957 10076 S 164m 88.7 0 11.1 org.videolan.vlc 2948 957 10076 S 164m 88.7 0 10.4 org.videolan.vlc 2948 957 10076 S 164m 88.7 0 10.7 org.videolan.vlc 2948 957 10076 S 164m 88.7 0 9.6 org.videolan.vlc 2948 957 10076 S 164m 88.7 0 10.7 org.videolan.vlc Pass 3: D/vlc ( 3120): using audio output module "android_audiotrack" 3120 957 10076 S 163m 88.4 0 25.8 org.videolan.vlc 3120 957 10076 S 160m 86.8 0 10.7 org.videolan.vlc 3120 957 10076 S 160m 86.8 0 10.3 org.videolan.vlc 3120 957 10076 S 160m 86.8 0 10.7 org.videolan.vlc 3120 957 10076 S 160m 86.8 0 10.2 org.videolan.vlc 3120 957 10076 S 160m 86.8 0 11.5 org.videolan.vlc
Conclusion
Although there is not much of a significant gain in either audio output, the AudioTrack output feels a bit more stable to the end-user with less glitchiness or stuttering. In addition, AudioTrack supports some formats not supported by amem output (such as mono audio).
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