name: Measure journal read

# CEO-2 / CEO-6: one read plus evaluation of the /autoplan publication guard on
# synthetic 120 MiB parent journals, on Linux and macOS, while the journal keeps
# growing. Dispatched by hand on the A2 branch; never on every PR. The Linux
# numbers are the acceptance record (<= 1000 ms, <= 256 MiB peak RSS); the
# macOS numbers are recorded and do not gate. Results go to the job summary.

on:
  workflow_dispatch:

permissions:
  contents: read

concurrency:
  group: measure-journal-read-${{ github.ref }}
  cancel-in-progress: true

jobs:
  measure:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]
    runs-on: ${{ matrix.os }}
    timeout-minutes: 20
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
        with:
          persist-credentials: false
      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
        with:
          bun-version: 1.4.2
      - name: Install dependencies
        run: bun install --frozen-lockfile
      - name: Measure one guarded read (3 runs per journal)
        run: |
          bun scripts/measure-journal-read.ts --runs 3 | tee "$RUNNER_TEMP/measure.md"
          cat "$RUNNER_TEMP/measure.md" >> "$GITHUB_STEP_SUMMARY"