pessimism
TypeScript icon, indicating that this package has built-in type declarations

1.1.4 • Public • Published

pessimism

A fast and compact HAMT-based KV-Cache with optimistic entries

pessimism is a fast and compact KV-Cache primarily built for @urql/exchange-graphcache. It's a functional and immutable HAMT structure, which increases structural sharing, while keeping memory usage compact. It supports optimistic entries, which can be invalidated in a single go.

Usage

This library works with both TypeScript and BuckleScript (Reason/OCaml).

yarn add pessimism
# or 
npm install --save pessimism

The basic methods support making a map and setting, getting, and removing entries:

import * as Map from 'pessimism';
 
let map = Map.set(Map.make(), "key", "value");
Map.get(map, "key"); // "value"
 
map = Map.remove(map, "key");
Map.get(map, "key"); // undefined

Optimistic entries can be set using setOptimistic and cleared using clearOptimistic:

import * as Map from 'pessimism';
 
let map = Map.set(Map.make(), "key", "value");
// Set an optimistic entry with the ID 1
map = Map.setOptimistic("key", "temp", 1);
 
Map.get(map, "key"); // "temp" which is the optimistic value
 
// Clear all optimistic entries with ID 1
map = Map.clearOptimistic(map, 1);
Map.get(map, "key"); // "value" which was the original value

Readme

Keywords

Package Sidebar

Install

npm i pessimism

Weekly Downloads

3

Version

1.1.4

License

MIT

Unpacked Size

97.1 kB

Total Files

25

Last publish

Collaborators

  • philpl