# Performance Benchmark Report
Date: 2026-02-07

## Overview
This document outlines the performance benchmarks for the Multilingual Press Zone plugin. Tests are executed using the Playwright Performance API suite located in `tests/performance/benchmark.spec.js`.

## Target Metrics

| Metric | Target | Current Status |
|--------|--------|----------------|
| Page Load Overhead | < 50ms | **Pending** |
| Database Queries | < 5 additional queries per page | **Pending** |
| Cache Hit Ratio | > 80% | **Pending** |
| Memory Usage | < 10MB increase | **Pending** |

## Test Suite Details

### 1. Frontend Page Load Overhead
Measures the time difference between a standard WordPress page load and a translated page load.
- **Method**: Playwright `page.goto()` timing average over 5 runs.
- **Success Criteria**: Average overhead < 50ms.

### 2. Database Queries per Page
Analyzes the number of database queries executed during a request.
- **Method**: Debug endpoint `/wp-json/multilingual-press-zone/v1/debug/query-count`.
- **Success Criteria**: Query count optimization (N+1 prevention) verified.

### 3. Cache Hit Ratio
Verifies the efficiency of the object caching layer.
- **Method**: Debug endpoint `/wp-json/multilingual-press-zone/v1/debug/cache-stats` after cache warming.
- **Success Criteria**: L1/L2 hits > 80%.

### 4. Memory Usage
Monitors PHP memory consumption during heavy operations.
- **Method**: Debug endpoint `/wp-json/multilingual-press-zone/v1/debug/memory-usage`.
- **Success Criteria**: Peak usage within safe limits (< 128MB total, < 10MB overhead).

### 5. API Throughput
Measures the speed of the translation queue API.
- **Method**: Bulk queueing of 50 items.
- **Success Criteria**: < 2000ms response time.

## Execution
Run the benchmark suite using:
```bash
npx playwright test tests/performance/benchmark.spec.js
```

## Optimization Strategies
- **QueryOptimizer**: Automatically combines translation queries.
- **Object Cache**: Caches language and translation data persistently.
- **Database Partitioning**: Splits large tables (Phase 3 feature).
- **Asynchronous Processing**: Offloads translation jobs to background workers.