Kpa-clawbot b472c8de30 perf: replace O(n²) selection sort with sort.Slice (#354) (#542) ...

## Summary

Fixes #354

Replaces the O(n²) selection sort in `sortedCopy()` with Go's built-in
`sort.Float64s()` (O(n log n)).

## Changes

- **`cmd/server/routes.go`**: Replaced manual nested-loop selection sort
with `sort.Float64s(cp)`
- **`cmd/server/helpers_test.go`**: Added regression test with
1000-element random input + benchmark

## Benchmark Results (ARM64)

```
BenchmarkSortedCopy/n=256     ~16μs/op    1 alloc
BenchmarkSortedCopy/n=1000    ~95μs/op    1 alloc
BenchmarkSortedCopy/n=10000   ~1.3ms/op   1 alloc
```

With the old O(n²) sort, n=10000 would take ~50ms+. The new
implementation scales as O(n log n).

## Testing

- All existing `TestSortedCopy` tests pass (unchanged behavior)
- New `TestSortedCopyLarge` validates correctness on 1000 random
elements
- `go test ./...` passes in `cmd/server`

Co-authored-by: you <you@example.com>

2026-04-03 13:11:59 -07:00

..

ingestor

test: push ingestor coverage from 70% to 84% (#344) (#492)

2026-04-02 17:31:47 -07:00

server

perf: replace O(n²) selection sort with sort.Slice (#354) (#542)

2026-04-03 13:11:59 -07:00