From c4b2fc07ec6c30e75cdb0bcec38c9de2d89b39a5 Mon Sep 17 00:00:00 2001
From: ChrisRackauckas-Claude <accounts@chrisrackauckas.com>
Date: Sat, 12 Sep 2026 05:07:43 -0400
Subject: [PATCH 1/2] 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
Agent-Model: SWE-2 Max
Agent-Session: local session transcript /home/crackauc/.local/share/devin/cli/summaries/history_5872b13ce3ce43b6.md
---
 .github/workflows/benchmark.yml | 29 ++++++++++++++++++++
 benchmark/benchmarks.jl         | 47 +++++++++++++++++++++++++++++++++
 2 files changed, 76 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..0e234268
--- /dev/null
+++ b/.github/workflows/benchmark.yml
@@ -0,0 +1,29 @@
+name: Benchmark this PR
+
+on:
+  pull_request:
+    branches: [main]
+    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: ${{ matrix.version }}
+          script: "benchmark/benchmarks.jl"
+          extra-pkgs: "ModelingToolkit,OrdinaryDiffEq"
+          job-summary: true
diff --git a/benchmark/benchmarks.jl b/benchmark/benchmarks.jl
new file mode 100644
index 00000000..86ba1da8
--- /dev/null
+++ b/benchmark/benchmarks.jl
@@ -0,0 +1,47 @@
+using BenchmarkTools
+using ModelingToolkit
+using ModelingToolkit: t_nounits as t
+using ModelingToolkitStandardLibrary.Electrical
+using ModelingToolkitStandardLibrary.Blocks: Sine
+using OrdinaryDiffEq
+
+const SUITE = BenchmarkGroup()
+
+function rc_circuit()
+    @named source = Sine(offset = 1, amplitude = 10, frequency = 5)
+    @named voltage = Voltage()
+    @named resistor = Resistor(R = 1)
+    @named capacitor = Capacitor(C = 1, v = 0.0)
+    @named ground = Ground()
+    @named voltage_sensor = VoltageSensor()
+    @named current_sensor = CurrentSensor()
+
+    connections = [
+        connect(source.output, voltage.V)
+        connect(voltage.p, resistor.p)
+        connect(resistor.n, current_sensor.p)
+        connect(current_sensor.n, capacitor.p)
+        connect(capacitor.n, voltage.n, ground.g)
+        connect(capacitor.p, voltage_sensor.p)
+        connect(capacitor.n, voltage_sensor.n)
+    ]
+
+    return System(
+        connections, t;
+        systems = [
+            resistor, capacitor, source, voltage, ground,
+            voltage_sensor, current_sensor,
+        ], name = :rc_circuit
+    )
+end
+
+SUITE["rc_circuit"] = BenchmarkGroup()
+SUITE["rc_circuit"]["build"] = @benchmarkable rc_circuit()
+model = rc_circuit()
+SUITE["rc_circuit"]["mtkcompile"] = @benchmarkable mtkcompile($model)
+sys = mtkcompile(model)
+SUITE["rc_circuit"]["odeproblem"] = @benchmarkable ODEProblem($sys, [], (0.0, 10.0))
+prob = ODEProblem(sys, [], (0.0, 10.0))
+SUITE["rc_circuit"]["solve"] = @benchmarkable solve(
+    $prob, Tsit5(); save_everystep = false, abstol = 1.0e-8, reltol = 1.0e-8
+)

From dcfd8bfa1125e3d9dfbee233283405f679d26f3e Mon Sep 17 00:00:00 2001
From: ChrisRackauckas-Claude <accounts@chrisrackauckas.com>
Date: Sat, 12 Sep 2026 05:15:01 -0400
Subject: [PATCH 2/2] Bump benchmark job timeout to 60 minutes

The dep install + precompile plus benchmarking both the base and PR revs
exceeds the 30 minute job timeout on this package's dependency tree.

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
Agent-Model: SWE-2 Max
Agent-Session: local session transcript /home/crackauc/.local/share/devin/cli/summaries/history_5872b13ce3ce43b6.md
---
 .github/workflows/benchmark.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 0e234268..cfc9f345 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -12,7 +12,7 @@ permissions:
 jobs:
   benchmark:
     runs-on: ubuntu-latest
-    timeout-minutes: 30
+    timeout-minutes: 60
     strategy:
       fail-fast: false
       matrix: