From 5c4105a5c7c884db207cadfd71a91cf1e608a9a7 Mon Sep 17 00:00:00 2001
From: ChrisRackauckas-Claude <accounts@chrisrackauckas.com>
Date: Fri, 11 Sep 2026 11:43:51 -0400
Subject: [PATCH] Add AirspeedVelocity benchmarking CI

Adds a benchmark workflow (Julia 1 and lts) and a benchmark/benchmarks.jl
suite covering representative workloads so PRs check for performance
regressions.

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Agent-Harness: devin 3000.10.21 (611c1cba)
Agent-Model: SWE-2 High
Agent-Session: local session transcript /home/crackauc/sandbox/tmp_20260911_112052_59120/history_6a789c0b69c64ca3.md
---
 .github/workflows/benchmark.yml | 29 +++++++++++++++++++
 benchmark/benchmarks.jl         | 50 +++++++++++++++++++++++++++++++++
 2 files changed, 79 insertions(+)
 create mode 100644 .github/workflows/benchmark.yml
 create mode 100644 benchmark/benchmarks.jl

diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
new file mode 100644
index 00000000..b35da5d5
--- /dev/null
+++ b/.github/workflows/benchmark.yml
@@ -0,0 +1,29 @@
+name: Benchmark this PR
+
+on:
+  pull_request:
+    branches: [master]
+    paths-ignore: ['docs/**']
+
+permissions:
+  pull-requests: write
+  contents: read
+
+jobs:
+  benchmark:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        version: ["1", "lts"]
+    env:
+      # Force consistent Julia depot path for self-hosted runners
+      JULIA_DEPOT_PATH: ~/.julia
+    steps:
+      - uses: MilesCranmer/AirspeedVelocity.jl@action-v1
+        with:
+          julia-version: ${{ matrix.version }}
+          script: "benchmark/benchmarks.jl"
+          extra-pkgs: "StableRNGs"
+          job-summary: true
diff --git a/benchmark/benchmarks.jl b/benchmark/benchmarks.jl
new file mode 100644
index 00000000..2e75bb48
--- /dev/null
+++ b/benchmark/benchmarks.jl
@@ -0,0 +1,50 @@
+using RecursiveArrayTools, BenchmarkTools
+using LinearAlgebra, StableRNGs
+
+const SUITE = BenchmarkGroup()
+const rng = StableRNG(123)
+
+# =============================================================================
+# ArrayPartition
+# =============================================================================
+
+SUITE["arraypartition"] = BenchmarkGroup()
+
+ap1 = ArrayPartition(rand(rng, 500), rand(rng, 40, 40), rand(rng, 60))
+ap2 = ArrayPartition(rand(rng, 500), rand(rng, 40, 40), rand(rng, 60))
+
+SUITE["arraypartition"]["construct"] = @benchmarkable ArrayPartition(
+    $(rand(rng, 500)), $(rand(rng, 40, 40)), $(rand(rng, 60))
+)
+SUITE["arraypartition"]["broadcast_add"] = @benchmarkable $ap1 .+ $ap2
+SUITE["arraypartition"]["scalar_mul"] = @benchmarkable 1.5 .* $ap1
+SUITE["arraypartition"]["norm"] = @benchmarkable norm($ap1)
+SUITE["arraypartition"]["recursivecopy!"] = @benchmarkable recursivecopy!(
+    out, $ap1
+) setup = (out = recursivecopy($ap1))
+SUITE["arraypartition"]["recursivefill!"] = @benchmarkable recursivefill!(
+    out, 0.5
+) setup = (out = recursivecopy($ap1))
+
+# =============================================================================
+# VectorOfArray
+# =============================================================================
+
+SUITE["vectorofarray"] = BenchmarkGroup()
+
+voa_u = [rand(rng, 200) for i in 1:100]
+voa = VectorOfArray(voa_u)
+voa2 = VectorOfArray([rand(rng, 200) for i in 1:100])
+
+SUITE["vectorofarray"]["construct"] = @benchmarkable VectorOfArray($voa_u)
+SUITE["vectorofarray"]["to_matrix"] = @benchmarkable Array($voa)
+SUITE["vectorofarray"]["broadcast_add"] = @benchmarkable $voa .+ $voa2
+SUITE["vectorofarray"]["map"] = @benchmarkable vecvecapply(sum, $voa)
+
+# =============================================================================
+# Nested broadcast (mixed ArrayPartition in VectorOfArray)
+# =============================================================================
+
+SUITE["nested"] = BenchmarkGroup()
+nested = VectorOfArray([ArrayPartition(rand(rng, 20), rand(rng, 10)) for i in 1:50])
+SUITE["nested"]["broadcast_add"] = @benchmarkable $nested .+ $nested