docs/BUILD_OPTIMIZATION_GUIDE.md

Build & Test Workflow Optimization Guide

Date: 2025-01-27 Purpose: Guide for optimizing build and test workflows Status: Complete

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Overview

This guide provides strategies and best practices for optimizing build and test workflows across the integrated workspace.

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Optimization Strategies

1. Build Caching

Turborepo Caching

Configuration: turbo.json

{
  "pipeline": {
    "build": {
      "dependsOn": ["^build"],
      "outputs": ["dist/**", ".next/**", "build/**"],
      "cache": true
    }
  }
}

Benefits:

• Faster builds (skip unchanged packages)
• Reduced CI/CD time
• Lower resource usage

Docker Layer Caching

# Cache dependencies
COPY package.json pnpm-lock.yaml ./
RUN pnpm install --frozen-lockfile

# Copy source (changes more frequently)
COPY src ./src
RUN pnpm build

2. Parallel Execution

Turborepo Parallel Tasks

{
  "pipeline": {
    "build": {
      "dependsOn": ["^build"]
    },
    "test": {
      "dependsOn": ["build"]
    }
  }
}

Benefits:

• Build packages in parallel
• Run tests concurrently
• Faster overall execution

3. Incremental Builds

TypeScript Incremental Compilation

{
  "compilerOptions": {
    "incremental": true,
    "tsBuildInfoFile": ".tsbuildinfo"
  }
}

Benefits:

• Only rebuild changed files
• Faster compilation
• Better IDE performance

4. Test Optimization

Test Filtering

# Run only changed tests
pnpm test --changed

# Run tests in parallel
pnpm test --parallel

# Use test cache
pnpm test --cache

Test Sharding

# Split tests across workers
pnpm test --shard=1/4
pnpm test --shard=2/4
pnpm test --shard=3/4
pnpm test --shard=4/4

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CI/CD Optimization

1. Conditional Execution

# Only run if relevant files changed
jobs:
  test:
    if: contains(github.event.head_commit.modified, 'src/')

2. Matrix Strategy

strategy:
  matrix:
    node-version: [18, 20]
    os: [ubuntu-latest, windows-latest]

3. Artifact Caching

- uses: actions/cache@v3
  with:
    path: |
      node_modules
      .next/cache
    key: ${{ runner.os }}-${{ hashFiles('**/pnpm-lock.yaml') }}

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Monitoring & Metrics

Build Metrics

Track:

• Build duration
• Cache hit rate
• Test execution time
• Resource usage

Optimization Targets

• Build time: < 5 minutes (incremental)
• Test time: < 10 minutes (full suite)
• Cache hit rate: > 80%
• Parallel efficiency: > 70%

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Best Practices

Build Optimization

• Use build caching
• Enable incremental builds
• Parallelize where possible
• Minimize dependencies

Test Optimization

• Run tests in parallel
• Use test filtering
• Cache test results
• Optimize test setup

CI/CD Optimization

• Conditional execution
• Artifact caching
• Parallel jobs
• Fast feedback

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Last Updated: 2025-01-27