Performance Optimization: Resolver, Benchmarking & Batch Operations

.github/workflows/ci.yaml

@@ -139,6 +139,36 @@ jobs:
         run: |
           pipenv run pytest -ra -n auto -v --fulltrace tests
 
+  benchmark:
+    name: Package Manager Benchmark
+    needs: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -y libxmlsec1-dev librdkafka-dev
+      - name: Install benchmark utilities
+        run: pip install csv2md
+      - name: Run benchmark suite
+        working-directory: benchmarks
+        run: python benchmark.py
+      - name: Display benchmark results
+        working-directory: benchmarks
+        run: |
+          if [ -f stats.csv ]; then
+            csv2md stats.csv >> $GITHUB_STEP_SUMMARY
+          fi
+      - uses: actions/upload-artifact@v4
+        with:
+          name: pipenv-benchmark-stats
+          path: benchmarks/stats.csv
+          retention-days: 30
+
   build:
     name: Build Package
     needs: lint

Makefile

@@ -180,3 +180,12 @@ reimport-pip-patch:
 pypi-server: SERVER ?= gunicorn
 pypi-server:
 	pipenv run pypi-server run --server $(SERVER) -v --host=0.0.0.0 --port=8080 --hash-algo=sha256 --disable-fallback ./tests/pypi/ ./tests/fixtures
+
+.PHONY: benchmark
+benchmark:
+	cd benchmarks && python benchmark.py
+
+.PHONY: benchmark-clean
+benchmark-clean:
+	cd benchmarks && rm -f requirements.txt Pipfile.lock stats.csv
+	cd benchmarks && rm -rf timings/

benchmarks/.gitignore

@@ -0,0 +1,11 @@
+# Generated files
+requirements.txt
+Pipfile.lock
+stats.csv
+
+# Timing data
+timings/
+
+# Virtual environments
+.venv/
+__pycache__/

benchmarks/Pipfile

@@ -0,0 +1,12 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+# Dependencies will be added during benchmark import step
+
+[dev-packages]
+
+[requires]
+python_version = "3.11"

benchmarks/README.md

@@ -0,0 +1,77 @@
+# Pipenv Package Manager Benchmark
+
+This directory contains benchmarking tests for pipenv based on the [python-package-manager-shootout](https://github.com/lincolnloop/python-package-manager-shootout) project.
+
+## Purpose
+
+These benchmarks help validate that pipenv performance doesn't regress over time by testing common package management operations against a real-world dependency set from [Sentry's requirements](https://github.com/getsentry/sentry/blob/main/requirements-base.txt).
+
+## Operations Benchmarked
+
+- **tooling** - Installing pipenv using the current development version
+- **import** - Converting requirements.txt to Pipfile format
+- **lock** - Generating Pipfile.lock from dependencies
+- **install-cold** - Installing packages with empty cache
+- **install-warm** - Installing packages with populated cache
+- **update** - Updating all packages to latest versions
+- **add-package** - Adding a new package and updating lock file
+
+## Usage
+
+### Local Testing
+
+```bash
+# Run all benchmark operations
+make benchmark
+
+# Clean benchmark artifacts
+make benchmark-clean
+
+# Run individual operations
+cd benchmarks
+python benchmark.py                    # Run full benchmark suite
+python benchmark.py setup              # Download requirements.txt
+python benchmark.py tooling            # Benchmark pipenv installation
+python benchmark.py import             # Benchmark requirements import
+python benchmark.py lock-cold          # Benchmark lock with cold cache
+python benchmark.py lock-warm          # Benchmark lock with warm cache
+python benchmark.py install-cold       # Benchmark install with cold cache
+python benchmark.py install-warm       # Benchmark install with warm cache
+python benchmark.py update-cold        # Benchmark update with cold cache
+python benchmark.py update-warm        # Benchmark update with warm cache
+python benchmark.py add-package        # Benchmark adding a package
+python benchmark.py stats              # Generate stats.csv
+```
+
+### CI Integration
+
+The benchmarks run automatically in GitHub Actions on the `ubuntu-latest` runner as part of the CI pipeline. Results are:
+
+- Displayed in the job summary with timing statistics
+- Uploaded as artifacts for historical analysis
+- Used to detect performance regressions
+
+## Files
+
+- `benchmark.py` - Main benchmark runner script
+- `Pipfile` - Base Pipfile template (dependencies added during import)
+- `requirements.txt` - Downloaded from Sentry's requirements-base.txt during setup
+- `timings/` - Directory created during benchmarks to store timing data
+- `stats.csv` - Generated CSV with benchmark results
+
+## Dependencies
+
+The benchmark uses Sentry's `requirements-base.txt` as a representative real-world dependency set. This includes packages like:
+
+- Django and related packages
+- Database connectors
+- Serialization libraries
+- HTTP clients
+- Development tools
+
+## Notes
+
+- Benchmarks only run on Linux in CI to ensure consistent timing measurements
+- System dependencies (libxmlsec1-dev, librdkafka-dev) are installed for Sentry requirements
+- Cache clearing ensures cold/warm scenarios are properly tested
+- Results include CPU time, memory usage, and I/O statistics