--- title: Agent Memory Head to Head | daily.dev description: A hands-on comparison of two approaches to giving AI agents long-term memory: a hand-rolled always-on sample from Google's generative-ai repo (built with... canonical: https://daily.dev/posts/agent-memory-head-to-head-1ovyjwqy2 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Agent Memory Head to Head | daily.dev og:description: A hands-on comparison of two approaches to giving AI agents long-term memory: a hand-rolled always-on sample from Google's generative-ai repo (built with... og:url: https://daily.dev/posts/agent-memory-head-to-head-1ovyjwqy2 og:image: https://api.daily.dev/og/posts/1OvyJWqY2.png og:image:alt: Agent Memory Head to Head og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Agent Memory Head to Head **[Medium](https://daily.dev/sources/medium_js)** · 8 min read · 0 upvotes · 0 comments ## Summary A hands-on comparison of two approaches to giving AI agents long-term memory: a hand-rolled always-on sample from Google's generative-ai repo (built with Google ADK and Gemini 3.1 Flash Lite) versus the managed Vertex AI Memory Bank service. Both were tested on identical inputs — a markdown file, a chat screenshot, and an audio memo. The self-hosted sample uses SQLite with a recent-window retrieval (LIMIT 50, no vector search), multi-agent orchestration adding 2.4–4.7s per ingest, and has no per-user isolation or governance. Vertex AI Memory Bank deduplicates and merges memories, scopes by user_id, and returns similarity-ranked results in 0.7s. The recommendation: use the sample to learn the mechanics, switch to managed Memory Bank for production use cases requiring scale, isolation, and real retrieval. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [I Replaced Vector DBs with Google’s Memory Agent Pattern for my notes in Obsidian](https://daily.dev/posts/i-replaced-vector-dbs-with-google-s-memory-agent-pattern-for-my-notes-in-obsidian-nfi4qzoyp) · Towards Data Science · 0 upvotes · 0 comments - [\[Hands-on\] Build Your Own AI Avatar With Human-like Memory](https://daily.dev/posts/hands-on-build-your-own-ai-avatar-with-human-like-memory-2fofyajuy) · Daily Dose of Data Science \| Avi Chawla \| Substack · 1 upvotes · 0 comments - [Memory Scaling for AI Agents](https://daily.dev/posts/memory-scaling-for-ai-agents-yneck54it) · databricks · 1 upvotes · 0 comments --- Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#google-gemini](https://daily.dev/tags/google-gemini), [#vertex-ai](https://daily.dev/tags/vertex-ai) [View this post on daily.dev](https://daily.dev/posts/agent-memory-head-to-head-1ovyjwqy2) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Agent Memory Head to Head","url":"https://daily.dev/posts/agent-memory-head-to-head-1ovyjwqy2","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/agent-memory-head-to-head-1ovyjwqy2"},"datePublished":"2026-07-22T06:36:29.909Z","dateModified":"2026-07-22T06:46:46.458Z","description":"A hands-on comparison of two approaches to giving AI agents long-term memory: a hand-rolled always-on sample from Google's generative-ai repo (built with...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/dc112cfb0c9b684de112ee46e9360ebf?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/dc112cfb0c9b684de112ee46e9360ebf?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Medium","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Medium","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/medium","url":"https://daily.dev/sources/medium_js"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/agent-memory-head-to-head-1ovyjwqy2","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"ai-agents,google-gemini,vertex-ai","timeRequired":"PT8M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Medium","item":"https://daily.dev/sources/medium_js"},{"@type":"ListItem","position":3,"name":"Agent Memory Head to Head"}]} ```