null VS bitmap

Compare null vs bitmap and see what are their differences.

null

reasonable handling of nullable values (by guregu)

bitmap

Simple dense bitmap index in Go with binary operators (by kelindar)
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null bitmap
5 1
1,723 268
- -
5.6 4.3
about 1 month ago 4 months ago
Go Assembly
BSD 2-clause "Simplified" License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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null

Posts with mentions or reviews of null. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-02-09.

bitmap

Posts with mentions or reviews of bitmap. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-12-30.
  • Example of Entity Component System in Go
    2 projects | /r/golang | 30 Dec 2021
    Good question, I think there's many different lessons. To your point about bitmasks, you can imagine that each component (i.e. column) has an array of data and a large bitmap that identifies whether a component is present or not. Had to build a SIMD implementation so you can do and, and not, or and xor operations on millions of components within reasonable amount of time. Interestingly enough, you still need a hashmap or b+tree in case you want to retrieve a component by it's ID instead of an index, but the rest of things can be modeled with bitmap indexes.

What are some alternatives?

When comparing null and bitmap you can also consider the following projects:

fsm - Finite State Machine for Go

go-adaptive-radix-tree - Adaptive Radix Trees implemented in Go

bitset - Go package implementing bitsets

null - Nullable Go types that can be marshalled/unmarshalled to/from JSON.

trie - Data structure and relevant algorithms for extremely fast prefix/fuzzy string searching.

hyperloglog - HyperLogLog with lots of sugar (Sparse, LogLog-Beta bias correction and TailCut space reduction) brought to you by Axiom

roaring - Roaring bitmaps in Go (golang), used by InfluxDB, Bleve, DataDog

boomfilters - Probabilistic data structures for processing continuous, unbounded streams.

willf/bloom - Go package implementing Bloom filters, used by Milvus and Beego.

go-geoindex - Go native library for fast point tracking and K-Nearest queries

conjungo - A small flexible merge library in go

set - A simple Set data structure implementation in Go (Golang) using LinkedHashMap.