# Report-only CPU benchmarks, moved out of ci.yml: they never fail the build (shared CI
# hardware is too noisy to gate on), so running them per-push only occupied a fleet slot
# during fan-out storms. Nightly + on demand is exactly as much signal at none of the
# queue cost. The tight regression gate + the real encode/stream path live on the
# self-hosted GPU runner (Tier 3, bench-gpu.yml).
name: bench
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

on:
  schedule:
    - cron: '30 4 * * *'
  workflow_dispatch:

# Shared compile cache: sccache -> RustFS S3 (storage.unom.io, LAN-pinned via ci-core's
# unbound). Keys include compiler hash + target + flags, so cross-OS/arch entries can
# never collide; every Rust job on every host feeds and reads one warm cache.
env:
  RUSTC_WRAPPER: sccache
  SCCACHE_BUCKET: unom-ci-sccache
  SCCACHE_ENDPOINT: https://storage.unom.io
  SCCACHE_REGION: home-central
  AWS_ACCESS_KEY_ID: ${{ secrets.SCCACHE_ACCESS_KEY_ID }}
  AWS_SECRET_ACCESS_KEY: ${{ secrets.SCCACHE_SECRET_ACCESS_KEY }}
  # sccache and incremental compilation are mutually exclusive; CI wants the shared
  # cache, dev boxes keep incremental.
  CARGO_INCREMENTAL: "0"

jobs:
  bench:
    # Tier-1 (criterion microbenchmarks) + Tier-2 (FEC loss recovery) — GPU-free, so they run here.
    runs-on: ubuntu-24.04
    container:
      image: 192.168.1.58:5010/punktfunk-rust-ci:latest
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4

      # Shared compile cache (sccache -> RustFS S3 over the LAN). Baked into the builder
      # images; this fetch keeps the job green while the running :latest predates the bake.
      - name: sccache (no-op once the image bakes it)
        run: |
          command -v sccache >/dev/null 2>&1 || {
            curl -fsSL https://github.com/mozilla/sccache/releases/download/v0.10.0/sccache-v0.10.0-x86_64-unknown-linux-musl.tar.gz \
              | tar -xz --wildcards --strip-components=1 -C /usr/local/bin '*/sccache'
          }
          sccache --version

      - name: Prep
        run: |
          git config --global --add safe.directory "$PWD"
          command -v python3 >/dev/null || { apt-get update && apt-get install -y --no-install-recommends python3; }
      - name: Tier-1 microbenchmarks (criterion)
        run: cargo bench -p punktfunk-core --bench pipeline -- --warm-up-time 1 --measurement-time 3
      - name: Tier-2 FEC loss recovery (loss-harness)
        run: cargo run -q -p loss-harness
      - name: Compare vs baseline (report-only)
        run: python3 scripts/bench/compare.py --threshold 0.5