search: Avoid sorting in searchResultsCommon.update

Created by: tsenart

name              old time/op    new time/op    delta
SearchResults-16    4.40ms ±25%    3.82ms ±24%  -13.18%  (p=0.004 n=15+14)

name              old alloc/op   new alloc/op   delta
SearchResults-16    1.73MB ± 0%    1.73MB ± 0%   +0.12%  (p=0.000 n=14+15)

name              old allocs/op  new allocs/op  delta
SearchResults-16     10.6k ± 0%     10.6k ± 0%   -0.11%  (p=0.000 n=13+14)