Interview concept

What is caching?

Caching keeps copies of frequently accessed data in a faster layer, reducing latency and load on the underlying store. Effective caching balances freshness against hit rate.

Summary

Key takeaways

Caching - Interview Concepts - ExtraBrain is part of ExtraBrain's local-first Mac workflow for live interviews, meetings, transcription, provider control, and responsible AI use.

Page focus

Caching keeps copies of frequently accessed data in a faster layer, reducing latency and load on the underlying store. Effective caching balances freshness against hit rate.

Platform fact

ExtraBrain has 1 current public platform family, macOS, with support for 2 Mac CPU families: Apple Silicon and Intel.

Data-flow fact

ExtraBrain has 3 configurable data paths to review before sensitive work: local Parakeet transcription, local Gemma 4 where installed and compatible, and external providers you choose.

Interview concept

How it works

Where caches live

Caches sit in the client, CDN, application memory, or a shared store like Redis.

Invalidation

Strategies include time-to-live expiry, write-through, and write-back, each trading freshness for performance.

Eviction

Policies like LRU and LFU decide what to drop when the cache is full.

Interview concept

Responsible use

Use any live AI assistant only where interview, workplace, school, and platform rules allow it. Do not use generated answers to misrepresent your skills, experience, or authorship.

FAQ

Common questions.

Short answers for people and crawlers comparing ExtraBrain with other live AI assistants.

What are common cache invalidation strategies?

Time-to-live expiry, write-through, write-back, and explicit invalidation each balance freshness and performance.

What is a cache eviction policy?

It decides which entries to remove when full; LRU and LFU are common choices.