tree 97435ff6acdd3bc5858cf1afb5ebb21f63467875
parent 122731ad4a52d988d63c31b8b1b82ba6bbf174c2
author Vincent Rabaud <vrabaud@google.com> 1670193306 +0100
committer Vincent Rabaud <vrabaud@google.com> 1670575560 +0000

K-means: switch pipeline to 16 bit.

Less RAM, less for loops in SIMD, simpler SIMD instructions.

On rtc_screen, speed 0, 50 runs, speed-ups are in %:

screen_recording_crd.1920_1080.y4m	0.483
screenshare_buganizer.1900_1306.y4m	0.718
screenshare_colorslides.1820_1320.y4m	0.913
screenshare_slidechanges.1850_1110.y4m	0.576
screenshare_youtube.1680_1178.y4m	0.465
slides_webplot.1920_1080.y4m	0.475
sc_web_browsing720p.y4m	0.690
screen_crd_colwinscroll.1920_1128.y4m	0.146
{OVERALL}	0.558

At speed 10:

screen_recording_crd.1920_1080.y4m	0.347
screenshare_buganizer.1900_1306.y4m	1.145
screenshare_colorslides.1820_1320.y4m	1.028
screenshare_slidechanges.1850_1110.y4m	0.945
screenshare_youtube.1680_1178.y4m	0.366
slides_webplot.1920_1080.y4m	0.999
sc_web_browsing720p.y4m	1.261
screen_crd_colwinscroll.1920_1128.y4m	0.133
{OVERALL}	0.778

Change-Id: I009d31e749c54474b56ff36aec520f686d728f9e