latency
3 free lessons tagged latency across Computer Science, AI. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.
TCP: Reliability, Windows, and Congestion
TCP turns a lossy packet service into an ordered byte stream, and almost every performance surprise on the internet comes from how it does that. Work through the handshake, cumulative ACKs, retransmission timers, the two windows, slow start and AIMD, CUBIC versus BBR, bufferbloat, and when to reach for UDP instead.
LLM Pricing and Latency: What Actually Drives Cost
How frontier LLM costs and latency actually work in 2026 — input vs output token asymmetry, prompt caching, batch API discounts, TTFT and tokens-per-second, reasoning-model amplification, and when self-hosting breaks even.
Choosing the Right LLM for Your Use Case
A practical decision framework for picking an LLM in 2026 — define the task, build an offline eval, measure quality + latency + cost on real candidates, and avoid the classic trap of optimizing for benchmarks instead of your task.