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DMDinesh Madushankakriyano.hashnode.dev3d ago · 7 min read

UUID v4 Explained: When and Why Developers Use It

Modern applications constantly need identifiers. A new database record needs an ID, an API request may need a unique reference, and a distributed application may need to create identifiers without ask

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RHRanjeet Harishchandresystemsbyranjeet.hashnode.devSep 24 · 13 min read

What Does a 19.1M IDs/sec Benchmark Actually Measure?

A checked-in Node.js benchmark for GID-128 reports 19,079,909 calls per second on Node 22.16.0 and an Apple M4. That is a real result from one run. It is also easy to misread. The JavaScript API asks

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YJYasir Jafriyasir323.hashnode.devSep 14 · 13 min read

Picking the Right UUID Version (So Your Database Doesn't Hate You)

I used to type uuid.uuid4() for years without giving it a second thought. It works, it's unique, ship it. Then one afternoon I was staring at a Postgres table where inserts had slowed to a crawl, the

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YJYasir Jafriyasir323.hashnode.devSep 14 · 12 min read

Choosing a Primary Key: A Tour of the IDs Real Systems Actually Use

The last article in this series was all about picking the right UUID version. This one pulls back a bit further, because UUIDs are just one item on a much longer menu, and depending on what you're bui

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JMJackson Mumomumojack.hashnode.devJul 16 · 6 min read

The Trouble with Universal IDs : Part 1

It is a truth universally acknowledged that any object in software, in possession of state, must be in need of a unique identifier. And getting it wrong can have consequences far less polite than Aust

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Bbrunovtbrunovt.hashnode.devJun 24 · 6 min read

Pick Your Cut: A Chef's Guide to GUID Versions

Most developers learn one GUID / UUID version and stop there. They call Guid.NewGuid(), uuid.uuid4() or crypto.randomUUID(), get a random 128-bit value and move on. It works, so the question never com

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Bbrunovtbrunovt.hashnode.devApr 13 · 5 min read

GUID v4 vs v7: Why You Should Care About the Shift

You are reviewing a pull request and see Guid.NewGuid(), uuid.uuid4(), or crypto.randomUUID(). It works, it compiles, and no one usually questions it. That has been the default for years. GUID / UUID

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Bbrunovtbrunovt.hashnode.devApr 2 · 3 min read

GUID vs UUID: What They Are and How to Generate Them

If you’ve ever seen an identifier like f47ac10b-58cc-4372-a567-0e02b2c3d479, you’ve encountered a GUID or UUID. These are 128-bit identifiers meant to be globally unique and are commonly used in datab

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TTuanhdotnettuanhnet.hashnode.devMar 20 · 15 min read

Reasons UUID as a Primary Key Is Often Slow in Real Databases

Source: Reasons UUID as a Primary Key Is Often Slow in Real Databases 1. Why the slowdown usually starts at the storage engine level When developers say “UUID is slow,” they are usually not complaining about the act of comparing 16 bytes inste...

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ZHze hedevkitsblog.hashnode.devMar 20 · 3 min read

UUID v7 vs v4: Why Time-Ordered UUIDs Matter for Modern Databases

The UUID Version Dilemma You're building a new service. You need unique IDs. Someone says "just use UUID v4" — but should you? TL;DR: Use UUID v7 for new systems (time-ordered, database-friendly). Use v4 only if randomness is a hard requirement. Quic...

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Trending tags this week

UUID v4 Explained: When and Why Developers Use It

What Does a 19.1M IDs/sec Benchmark Actually Measure?

Picking the Right UUID Version (So Your Database Doesn't Hate You)

Choosing a Primary Key: A Tour of the IDs Real Systems Actually Use

The Trouble with Universal IDs : Part 1

Pick Your Cut: A Chef's Guide to GUID Versions

GUID v4 vs v7: Why You Should Care About the Shift

GUID vs UUID: What They Are and How to Generate Them

Reasons UUID as a Primary Key Is Often Slow in Real Databases

UUID v7 vs v4: Why Time-Ordered UUIDs Matter for Modern Databases