Benchmark & Optimize LLM App Performance
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Benchmark & Optimize LLM App Performance
This course is part of Build Next-Gen LLM Apps with LangChain & LangGraph Specialization
Instructors: Starweaver
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What you'll learn
Optimize LLM behavior using structured prompting and self-checks to reduce variance and errors.
Design scalable middleware to manage API requests, retries, caching, and token budgets for performance targets.
Build user-centered interfaces that collect feedback and improve LLM accuracy and user trust.
Skills you'll gain
Tools you'll learn
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December 2025
1 assignment
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There are 3 modules in this course
Benchmark & Optimize LLM App Performance is a hands-on journey from “it works” to “it flies.” You’ll start by treating speed and cost as product features-defining a baseline with the right metrics (p50/p95 latency, tokens/sec, throughput, determinism, cost per task) and building a lightweight benchmarking harness you can rerun on every change. Next, you’ll learn to hunt bottlenecks across the stack-network, model, prompt, and post-processing-using practical patterns that cut tokens without cutting quality, plus caching strategies for embeddings, RAG, and tool calls. Then you’ll run A/B/C experiments to compare models and prompts on the same dataset, interpret results with simple stats, and choose a winner confidently. Finally, you’ll harden for production with concurrency limits, queues, timeouts, fallbacks, and a 30-day optimization playbook. Expect reusable templates, clear checklists, and realistic demos designed for busy developers and product builders who want measurable gains-not hype.
This course is designed for machine learning engineers, AI developers, data scientists, and product engineers who want to optimize and scale LLM-based applications for production environments. It’s also ideal for backend engineers and DevOps professionals aiming to enhance system performance, reduce latency, and improve cost-efficiency in AI deployments. Additionally, product managers and technical leads overseeing AI-powered systems will benefit from the practical insights provided, helping them to drive improvements in app performance and ensure that their LLM models deliver reliable, high-quality results at scale. This course requires basic knowledge of Python or JavaScript, familiarity with REST APIs, and a high-level understanding of how Large Language Models (LLMs) function. These skills will help you effectively engage with the course content, optimize performance, and implement solutions. By the end of this course, you'll have the skills to optimize LLM performance, tackle real-world bottlenecks, and implement efficient, scalable AI systems. You'll be ready to apply these techniques confidently, making your AI solutions faster, more reliable, and production-ready!
This module establishes why performance is a product feature, not a backend afterthought. We connect latency, cost, and answer quality to user-perceived speed (p50 vs p95, jitter) and trust. You’ll define a minimal metric set-latency, throughput, tokens/sec, determinism, and win-rate-then build a lightweight benchmarking harness that runs a small eval set, logs prompts/outputs, and exports clean CSVs. By the end, you’ll have a reproducible baseline you can rerun on every change.
What's included
4 videos2 readings1 peer review
4 videos•Total 26 minutes
- Welcome to Benchmarking LLM Apps•2 minutes
- Metrics That Matter: Latency, Throughput & Token Efficiency•7 minutes
- Building a Minimal Benchmark Harness (Design Walkthrough)•9 minutes
- Run Your First Baseline & Export the Data•8 minutes
2 readings•Total 10 minutes
- Welcome to the Course: Course Overview•5 minutes
- Evaluation Best Practices (OpenAI Docs)•5 minutes
1 peer review•Total 25 minutes
- Hands-On-Learning: Baseline or Bust: Your First Reproducible Benchmark•25 minutes
In this module, you'll trace where time actually goes: network hops, model inference, prompt bloat, and post-processing. You’ll learn practical prompt patterns that cut tokens without cutting quality, plus schema-first I/O that improves stability and parsing. We’ll add caching strategies for embeddings, RAG retrievals, and tool calls, including cache keys and invalidation rules to avoid stale answers. Expect clear heuristics for cold vs warm paths and a simple checklist to shave seconds-not just milliseconds.
What's included
3 videos1 reading1 peer review
3 videos•Total 22 minutes
- Designing Reliable API Calls for LLM Apps•6 minutes
- Rate Limits, Caching & Token Budgeting•7 minutes
- Building a Resilient Backend for LLM APIs•8 minutes
1 reading•Total 5 minutes
- OpenAI API Reference: Error Handling & Rate Limits•5 minutes
1 peer review•Total 25 minutes
- Hands-On-Learning: Backend Reliability Challenge: Handle It Smart•25 minutes
The final module turns tuning into a disciplined workflow. You’ll run A/B/C tests across model tiers and prompt variants on the same dataset to compare latency, cost per task, and quality with simple stats - then pick a winner. We’ll cover safe scaling: concurrency limits, queues, backpressure, retries, timeouts, and graceful degradation/fallbacks. You’ll leave with a 30-day optimization plan and a production playbook that keeps your app fast, affordable, and reliable after launch.
What's included
4 videos1 reading1 assignment2 peer reviews
4 videos•Total 27 minutes
- Why Experiment Design Beats Guesswork•8 minutes
- Shipping Safely: Canaries, Feature Flags & Rollbacks•8 minutes
- Run an A/B/C Test & Pick a Winner•7 minutes
- Course Wrap-up•4 minutes
1 reading•Total 5 minutes
- Working with Evals (OpenAI) - designing and running evals•5 minutes
1 assignment•Total 20 minutes
- Benchmark & Optimize LLM App Performance•20 minutes
2 peer reviews•Total 85 minutes
- Hands-On-Learning: Experiment Orchestrator: From Data to Decision •25 minutes
- Project: Optimize & Ship Your LLM App v1.0•60 minutes
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