enhance: Optimize param cost in search

[weiliu1031]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.68%. Comparing base (00edec2) to head (74d7352).

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #37738       +/-   ##
===========================================
+ Coverage   68.91%   80.68%   +11.77%     
===========================================
  Files         290     1357     +1067     
  Lines       25471   190743   +165272     
===========================================
+ Hits        17553   153902   +136349     
- Misses       7918    31415    +23497     
- Partials        0     5426     +5426     

Components	Coverage Δ
Client	61.25% <ø> (∅)
Core	68.91% <ø> (ø)
Go	83.20% <100.00%> (∅)

Files with missing lines	Coverage Δ
internal/proxy/lb_policy.go	98.08% <100.00%> (ø)

... and 1066 files with indirect coverage changes

[mergify]

@weiliu1031 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[weiliu1031]

/run-cpu-e2e

[mergify]

@weiliu1031 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.