I Wrote The Fastest Hashtable

Really Fast Hash Set and Map - Internals & Design - Julia Discourse

The fastest hash-table lookups with open addressing on C++, Rust and D with FNV-hasher are around 3-10 ns.

Speeding up your loops with HashTables/Dict - Finding 42

I'll code it up the “quick and dirty loop-de-loop” way and then compare it to using a hash table. ExamplePermalink. Here's the example. Write up ...

Revisiting hash table performance | Attractive Chaos - WordPress.com

10 years ago, Google's dense_hash_map was significantly faster than all the peers. It is still among the fastest in this benchmark. When we ...

AI times three—or how I made AI write a blog post for me - Applied Go

A blog post about writing a hash table in Go, written, coded and illustrated by AI tools. ... Fast Lookup: Hash tables allow for fast lookup in ...

Hash Functions all the way down - Aras Pranckevičius

A while ago I needed fast hash function for ~32 byte keys. We already had MurmurHash used in a bunch of places, so I started with that.

Why does a hash table have O(1) search? - Quora

If your hash function is really bad, you might end up having to do a linear search (if you use chaining). ... All of this can be made ...

How I didn't know how powerful and fast hashtables are - Evotec

While 59 seconds doesn't seem much, things quickly add up as you try to play with more significant data. My domain is just 4000 users. What ...

Introduction to hash tables - Algorithms and ideas in JAVA

Some time ago I wrote a post about binary search trees. I mostly ... performance from our expected O(1) would degrade to O(n)! That's ...

learn hash table the hard way -- part 1: probe distributions

During the development, I made a lot of experiments. Not only for getting better performance, but also knowing deeper on what's happening inside ...

Could you add xxHash (xxh3, the fastest hash algorithm)? - ghisler.ch

Does anyone here have details on the xxhash128 algorithm? Author of Total Commander https://www.ghisler.com.

C++Now 2018: You Can Do Better than std::unordered_map

C++Now 2018: You Can Do Better than std::unordered_map: New Improvements to Hash Table Performance. 57K views · 6 years ago ...more. CppNow.

Hash table performance and memory efficiency

The hash table with the best memory efficiency is simply the one with the highest load factor, (it can even exceed 100% memory efficiency by using key ...

Map/Dictionary/HashTable - which hash algorithm is used? - AutoIt

I made some performance tests to get a rough indication of which data structure is most appropriate and when. For this, I measured the time ...

QHash or QMultihash (specific performance based use case)?

This kills several performance problems with one stone (e.g. having to not only hash ... You wrote your table looks like QHash/QMultihash

Benchmarking the fastest hash function | Overclock.net

I find next two (made with former Everest benchmarker) graphs most useful: Cache READ bandwidth: Main Memory bandwidth: Looking at i7 3930K Main ...

Understanding Hash Tables and Why They are Important

The important attribute of a hash function is that it works by performing a computation on the input key. This means the speed at which it ...

Five Myths about Hash Tables - Hugh E. Williams

The story goes like this: you've created a hash table with one million slots. Let's say it's an array. What happens when you try and insert the ...

Hash Table Strategies

Performance is cache-miss bound? Use cache-aware buckets. A lot of times when ... (I wrote most of the code, but never got around to debugging it and ...

Code: Making a hash of data - busybee

Hash tables themselves were often even treated as an afterthought, a performance optimization that wasn't useful in the general case! In the ...

Fastest non-secure hash function!? - Encode's Forum

If speed is the only concern, why not just use hash that's equal to first byte of data? It will be fastest hash on the planet, albeit non very useful. Every ...