Ville Vesilehto 60227bd8d2 perf(kubernetes): optimize AutoPath slice allocation (#7323) ...

Pre-allocate slice capacity in AutoPath to eliminate unnecessary
memory reallocations. This avoids slice growth when appending
search domains and sentinel value.

Benchmark shows significant performance improvement:
- Before: 538.6 ns/op, 560 B/op, 13 allocs/op
- After:  436.8 ns/op, 336 B/op, 11 allocs/op
- Result: 19% faster, 40% less memory, 15% fewer allocations

The optimization benefits Kubernetes clusters using autopath for
server-side search path completion.

Adds benchmark test to measure AutoPath performance.

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>

2025-05-28 17:58:01 -07:00

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