ci: add benchmarks (#505)

* feat(performance): add benchmark step to CI workflow

Add a new 'Benchmark' job in the GitHub Actions workflow to run
performance tests and generate graphs. Save the test report as
an artifact in the Earthfile. The job runs on 'github-001' and
triggers on PRs labeled 'benchmarks' or on the main branch.

* remove unnecessary dependency from Benchmark job in GitHub Actions

* perf(performance): remove artifact saving from Earthfile

Remove the line saving the test report artifact locally, as it is
unnecessary for the current performance testing setup.

* refactor(workflows): move benchmark job to a separate workflow

Create a new benchmark.yml for the benchmark job. Remove the
benchmark job from main.yml. This organizes workflows better
by separating concerns.

* feat: add CI step for performance testing and update benchmark workflow

Add a new 'ci' target in Earthfile for local performance testing.
Update the benchmark workflow to use the new 'ci' step and upgrade
actions/upload-artifact to v4.

* fix(performance): add sudo to systemctl restart in Earthfile

Add sudo to the systemctl restart command to ensure proper
permissions are granted when restarting the ledger service
during performance tests.

* refactor(performance): remove ci block from Earthfile and update benchmark workflow

Remove redundant ci block from Earthfile and update the GitHub
Actions benchmark workflow to execute the 'run' target with
appropriate arguments.

* refactor(performance): remove ci block from Earthfile and update benchmark workflow

Remove redundant ci block from Earthfile and update the GitHub
Actions benchmark workflow to execute the 'run' target with
appropriate arguments.

* fix(workflow): remove sudo from systemctl command in benchmark.yml

* fix(workflow): remove sudo from systemctl command in benchmark.yml

* fix(workflow): update benchmark server start and stop commands

Update the command to start `ledger serve` without using `systemctl`.
Add a command to kill the server process after benchmarking.

.github/workflows/benchmark.yml

@@ -0,0 +1,36 @@
+name: Benchmark
+on:
+  workflow_dispatch:
+  pull_request:
+    types: [ assigned, opened, synchronize, reopened, labeled ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  Benchmark:
+    runs-on: "github-001"
+    if: contains(github.event.pull_request.labels.*.name, 'benchmarks') || github.ref == 'refs/heads/main'
+    steps:
+      - uses: 'actions/checkout@v4'
+        with:
+          fetch-depth: 0
+      - run: go build -o /tmp/ledger ./
+      - run: echo "running actions as ${USER}"
+      - run: /tmp/ledger serve --postgres-uri=postgres://formance:[email protected]/ledger --postgres-conn-max-idle-time=120s --postgres-max-open-conns=500 --postgres-max-idle-conns=100 &
+      - run: >
+          earthly
+          --allow-privileged
+          ${{ contains(github.event.pull_request.labels.*.name, 'no-cache') && '--no-cache' || '' }}
+          ./test/performance+run --args="-benchtime 10s --ledger.url=http://localhost:3068"
+      - run: >
+          earthly
+          --allow-privileged
+          ${{ contains(github.event.pull_request.labels.*.name, 'no-cache') && '--no-cache' || '' }}
+          ./test/performance+generate-graphs
+      - run: kill -9 $(ps aux | grep "ledger serve"| grep -v "grep" | awk '{print $2}')
+      - uses: actions/upload-artifact@v4
+        with:
+          name: graphs
+          path: test/performance/report