tree edb80bdc6803944d428864d88cfe12dccc587978
parent 8ea87322e99c3f74247a59571bcfdacd82836618
author chiyotsai <chiyotsai@google.com> 1553879809 -0700
committer Chi Yo Tsai <chiyotsai@google.com> 1553906087 +0000

Reduce number of ref to one in simple_motion_search

Simple motion search's overhead starts to become significant on speed
settings >= 3. Disabling this it helps us to speed up by about 0.5%.

Performance on midres:
  SPD  |  AVG_PSNR  |  OVR_PSNR  |   SSIM   |  AVG_SPDUP  |
   1   |   +0.002   |   +0.001   |  +0.010  |   +0.134%   |
   2   |   -0.002   |   +0.004   |  -0.016  |   +1.324%   |
   3   |   +0.008   |   +0.005   |  +0.024  |   +1.322%   |
   4   |   +0.008   |   +0.006   |  +0.016  |   +0.896%   |

STATS_CHANGED

Change-Id: Iac1c9b97cb97c79147a6682695508d4ad9a87264