Phase 4: Scale Improvements (D2 Distributed Caching, A3 Bun Test Runner)

[proffesor-for-testing]

Overview

This issue tracks Phase 4 scale improvements from the Bun-inspired optimization initiative (#132).

These tasks are future considerations separated from the current development focus.

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D2: Distributed Caching (0% Complete)

Goal

Achieve 50% CI time reduction through intelligent caching across distributed environments.

Tasks

• D2.1: S3 Backend - Cloud-native cache storage

  • Implement S3-compatible cache adapter
  • Support for presigned URLs for secure access
  • Multipart upload for large artifacts
  • Regional bucket selection for latency optimization

• D2.2: Redis Backend - High-speed ephemeral caching

  • Redis cluster support for horizontal scaling
  • TTL-based eviction policies
  • Pub/sub for cache invalidation events
  • Connection pooling and retry logic

• D2.3: Tiered Implementation - Intelligent cache hierarchy

  • L1: In-memory (fastest, smallest)
  • L2: Local SQLite (fast, medium)
  • L3: Redis (distributed, ephemeral)
  • L4: S3 (durable, largest)
  • Automatic promotion/demotion between tiers

Acceptance Criteria

• 50% CI pipeline time reduction on cache hit
• Cache hit rate > 80% for repeated builds
• Sub-100ms L2 cache retrieval
• Transparent failover between cache tiers

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A3: Bun Test Runner (0% Complete)

Goal

Evaluate and implement Bun test runner for faster test execution.

Tasks

• A3.1: Research & Compatibility Analysis

  • Evaluate Bun test runner features vs Jest
  • Identify incompatible Jest APIs (snapshots, mocks)
  • Benchmark Bun vs Jest on representative test suite
  • Document migration path

• A3.2: Implementation

  • Create Bun test configuration
  • Migrate test utilities to Bun-compatible format
  • Update test scripts for dual-runner support
  • Implement Bun-specific optimizations

• A3.3: Testing & Validation

  • Run full test suite on Bun
  • Compare coverage reports
  • Validate CI integration
  • Performance benchmarking report

Acceptance Criteria

• 2-4x test execution speedup vs Jest
• 100% test parity (same pass/fail results)
• CI pipeline integration working
• Fallback to Jest for incompatible tests

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Priority Assessment

Task	Impact	Effort	Dependencies
D2.1 S3 Backend	High	Medium	Infrastructure setup
D2.2 Redis Backend	High	Medium	Redis availability
D2.3 Tiered Cache	Very High	High	D2.1, D2.2
A3 Bun Runner	Medium	Low	Bun ecosystem maturity

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Related Issues

• Parent: Bun-Inspired Improvements: Remaining Phase 2-4 Tasks #132 (Bun-Inspired Improvements)
• Phase 2 (completed): B1.2 BaseAgent Decomposition, B1.3 Strategy Implementations
• Phase 3 (pending): B2 Plugin System, D1 Memory Pooling

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This issue is for future consideration. Current focus is on Phase 2-3 tasks.