The Offline Trap
A recommendation model with a higher offline NDCG might perform worse in production if it optimizes for engagement on clickbait, actively harming long-term user retention.
A/B Testing (Online)
The only true measure of a model is an online A/B test measuring the primary business KPI (revenue, conversion rate, time-on-site). Always reserve a holdout group.
Internal Resources
- Inference Cost Calculator
- Latency Estimator
- Tabular vs Deep Learning
- Local LLMs vs Managed APIs
- Time Series Baselines
- Tabular Model Selector
- Vision Architecture Selector
- VRAM Calculator
- Choosing Embeddings
- CNN vs ViT in 2024
- RLHF vs DPO
- RAG Chunking Strategies
- RAG Chunk Size Calculator
- Token Ratio Estimator
- Synthetic Data Generation
- Quantization Methods Explained
- Quantization Memory Savings
- Fine-Tuning vs LoRA
- LoRA Rank Calculator
- Multimodal Model Landscape