A practical walkthrough for engineers who want to see what an inference engine is doing under the hood. The article traces token generation, validates a hand-written Qwen3–0.6B loop against Hugging Face, and measures KV-cache memory and decode latency.

You’ll learn how prefill and decode differ, how the KV cache grows, how to validate a manual implementation, and why correctness should come before performance claims.

Read the full article on Medium:

https://techdelta.medium.com/build-your-own-qwen3-inference-loop-c0e49687d1c7