I would like to share my opus-tools build too: https://github.com/Chocobo1/opus-tools_win32-build
Seems a bit faster, probably VS2015 has some better optimizations... not sure.
mine-x64
Encoder stream format: 44100Hz / 2ch / 16bps
Command line: "C:\Audio Encoder\opusenc.exe" --bitrate 128 --vbr --comp 10 --ignorelength --quiet - "mine-x64.opus"
Total encoding time: 0:06.532, 49.42x realtime
2012-x64
Encoder stream format: 44100Hz / 2ch / 16bps
Command line: "C:\Audio Encoder\opusenc.exe" --bitrate 128 --vbr --comp 10 --ignorelength --quiet - "2012-x64.opus"
Total encoding time: 0:07.094, 45.51x realtime
lvqcl-x64
Encoder stream format: 44100Hz / 2ch / 16bps
Command line: "C:\Audio Encoder\opusenc.exe" --bitrate 128 --vbr --comp 10 --ignorelength --quiet - "lvqcl-x64.opus"
Total encoding time: 0:07.140, 45.21x realtime
As of bit-compare, mine is identical with lvqcl build but found difference with 2012 build.
"C:\Users\USMC\Desktop\mine-x64.opus"
"C:\Users\USMC\Desktop\2012-x64.opus"
Compared 15497600 samples.
Differences found: 848271 values, starting at 0:03.792583, peak: 0.0308494 at 0:19.797688, 1ch
Detected offset as 0 samples.