# Dependency Comparison Matrix

Comprehensive comparison of all tools and their alternatives.

## HTTP Clients

| Tool | Speed | Async | Type-Safe | Recommendation |
|------|-------|-------|-----------|-----------------|
| requests | Baseline | ❌ | ⚠️ | ❌ Legacy |
| httpx | 2-5x | ✅ | ✅ | ✅ **BEST** |
| aiohttp | 2x | ✅ | ⚠️ | ✅ Good |
| urllib3 | Baseline | ❌ | ❌ | ❌ Legacy |

**Recommendation**: Use **httpx** (modern, async-first, type-safe)

## JSON Serialization

| Tool | Speed | Type-Safe | Size | Recommendation |
|------|-------|-----------|------|-----------------|
| json | Baseline | ❌ | Large | ⚠️ Standard |
| msgspec | 50x | ✅ | Small | ✅ **BEST** |
| orjson | 10x | ❌ | Small | ✅ Good |
| ujson | 5x | ❌ | Small | ⚠️ OK |

**Recommendation**: Use **msgspec** (fastest, type-safe)

## Async Frameworks

| Tool | Abstraction | Structured | Error Handling | Recommendation |
|------|-------------|-----------|-----------------|-----------------|
| asyncio | ❌ | ⚠️ | ⚠️ | ⚠️ Standard |
| anyio | ✅ | ✅ | ✅ | ✅ **BEST** |
| trio | ✅ | ✅ | ✅ | ✅ Good |
| gevent | ⚠️ | ❌ | ⚠️ | ⚠️ Legacy |

**Recommendation**: Use **anyio** (best abstraction layer)

## Logging

| Tool | Structured | Performance | Enterprise | Recommendation |
|------|-----------|-------------|-----------|-----------------|
| logging | ❌ | Baseline | ⚠️ | ⚠️ Standard |
| loguru | ✅ | Good | ✅ | ✅ Good |
| structlog | ✅ | Good | ✅ | ✅ **BEST** |
| python-json-logger | ✅ | Baseline | ✅ | ⚠️ OK |

**Recommendation**: Use **structlog** for enterprise, **loguru** for simplicity

## Data Processing

| Tool | Speed | Memory | SQL | Recommendation |
|------|-------|--------|-----|-----------------|
| pandas | Baseline | High | ❌ | ⚠️ Standard |
| polars | 10-100x | Low | ✅ | ✅ **BEST** |
| duckdb | 5-50x | Low | ✅ | ✅ Good |
| ibis | 5-50x | Low | ✅ | ✅ Good |

**Recommendation**: Use **Polars** (fastest, lowest memory)

## Password Hashing

| Tool | Security | Speed | Adaptive | Recommendation |
|------|----------|-------|----------|-----------------|
| hashlib | ❌ | Fast | ❌ | ❌ Insecure |
| bcrypt | ✅ | Slow | ✅ | ✅ **BEST** |
| argon2 | ✅ | Slow | ✅ | ✅ Good |
| scrypt | ✅ | Slow | ✅ | ✅ Good |

**Recommendation**: Use **bcrypt** (industry standard)

## Encryption

| Tool | Speed | Security | Ease | Recommendation |
|------|-------|----------|------|-----------------|
| cryptography | Good | ✅ | ⚠️ | ✅ **BEST** |
| pycryptodome | Good | ✅ | ⚠️ | ✅ Good |
| nacl | Good | ✅ | ✅ | ✅ Good |

**Recommendation**: Use **cryptography** (most comprehensive)

## Authorization

| Tool | RBAC | ABAC | Performance | Recommendation |
|------|------|------|-------------|-----------------|
| authlib | ✅ | ⚠️ | Good | ✅ Good |
| pycasbin | ✅ | ✅ | Good | ✅ **BEST** |
| authz | ⚠️ | ✅ | Good | ⚠️ OK |

**Recommendation**: Use **PyCasbin** (RBAC + ABAC)

## Distributed Computing

| Tool | Scalability | Ease | Performance | Recommendation |
|------|-------------|------|-------------|-----------------|
| multiprocessing | Limited | ⚠️ | Good | ⚠️ Limited |
| ray | Unlimited | ✅ | Excellent | ✅ **BEST** |
| dask | Unlimited | ✅ | Good | ✅ Good |
| celery | Unlimited | ⚠️ | Good | ⚠️ Complex |

**Recommendation**: Use **Ray** (easiest, best performance)

## Observability

| Tool | Tracing | Metrics | Logs | Recommendation |
|------|---------|---------|------|-----------------|
| logging | ❌ | ❌ | ✅ | ⚠️ Limited |
| opentelemetry | ✅ | ✅ | ✅ | ✅ **BEST** |
| prometheus | ❌ | ✅ | ❌ | ✅ Good |
| datadog | ✅ | ✅ | ✅ | ✅ Good |

**Recommendation**: Use **OpenTelemetry** (open standard)

## Type Checking

| Tool | Speed | Strictness | IDE Support | Recommendation |
|------|-------|-----------|-------------|-----------------|
| mypy | Baseline | Good | Good | ✅ Good |
| basedpyright | 10x | Excellent | Excellent | ✅ **BEST** |
| pyright | 5x | Good | Excellent | ✅ Good |
| pyre | 10x | Good | Good | ✅ Good |

**Recommendation**: Use **basedpyright** (fastest, strictest)

## Linting

| Tool | Speed | Coverage | Fixes | Recommendation |
|------|-------|----------|-------|-----------------|
| pylint | Baseline | Excellent | ⚠️ | ⚠️ Slow |
| flake8 | Baseline | Good | ❌ | ⚠️ Slow |
| ruff | 100x | Good | ✅ | ✅ **BEST** |

**Recommendation**: Use **Ruff** (100x faster)

## Testing

| Tool | Speed | Features | Plugins | Recommendation |
|------|-------|----------|---------|-----------------|
| unittest | Baseline | Basic | ❌ | ⚠️ Limited |
| pytest | Good | Excellent | ✅ | ✅ **BEST** |
| nose2 | Good | Good | ✅ | ✅ Good |

**Recommendation**: Use **pytest** (most popular, best plugins)

## Summary: Best-in-Class Stack

### Core
- ✅ UV (package manager)
- ✅ Ruff (linting)
- ✅ basedpyright (type checking)
- ✅ pytest (testing)

### HTTP & Networking
- ✅ httpx (HTTP client)
- ✅ aiohttp (async HTTP)

### Data & Serialization
- ✅ msgspec (JSON)
- ✅ Polars (data processing)
- ✅ DuckDB (SQL)

### Async
- ✅ anyio (abstraction)

### Logging & Observability
- ✅ structlog (structured logging)
- ✅ OpenTelemetry (tracing)
- ✅ Prometheus (metrics)

### Security
- ✅ cryptography (encryption)
- ✅ bcrypt (password hashing)
- ✅ Authlib (OAuth/OIDC)
- ✅ PyCasbin (authorization)

### Distributed
- ✅ Ray (distributed computing)

## Migration Priority

1. **High** (Week 1): httpx, msgspec, anyio
2. **Medium** (Week 2): structlog, OpenTelemetry, Polars
3. **Low** (Week 3): Ray, Authlib, PyCasbin

