Another implementation of jonschlinkert/array-unique, which is faster on larger arrays
Install with npm:
npm install --save wwa-array-uniqueconst unique = require('wwa-array-unique');
let arr = ['a', 'b', 'c', 'c'];
console.log(unique(arr)) //=> ['a', 'b', 'c']
console.log(arr) //=> ['a', 'b', 'c']
/* The above modifies the input array. To prevent that: */
const unique = require("array-unique").immutable;
let arr = ['a', 'b', 'c', 'c'];
console.log(unique(arr)) //=> ['a', 'b', 'c']
console.log(arr) //=> ['a', 'b', 'c', 'c']Table values are number of operations per second. Unlike the original version,
my implementation of immutable is faster than unique.
| array-unique (mutable) | wwa-array-unique (mutable) | array-unique (immutable) | wwa-array-unique (immutable) | |
|---|---|---|---|---|
| 10 | 2,764,501 | 315,991 | 2,239,566 | 1,119,888 |
| 20 | 888,532 | 202,232 | 726,592 | 590,641 |
| 100 | 65,662 | 68,415 | 53,382 | 208,231 |
| 1,000 | 67,716 | 71,174 | 53,714 | 202,922 |
| 10,000 | 3,025 | 26,326 | 2,519 | 48,769 |
| array-unique (mutable) | wwa-array-unique (mutable) | array-unique (immutable) | wwa-array-unique (immutable) | |
|---|---|---|---|---|
| 10 | 2,013,162 | 1,569,884 | 1,616,899 | 2,259,815 |
| 20 | 1,026,325 | 887,556 | 774,410 | 1,168,428 |
| 100 | 80,493 | 177,247 | 58,954 | 198,410 |
| 1,000 | 76,875 | 165,295 | 58,541 | 192,993 |
| 10,000 | 3,760 | 36,623 | 2,866 | 46,911 |
| array-unique (mutable) | wwa-array-unique (mutable) | array-unique (immutable) | wwa-array-unique (immutable) | |
|---|---|---|---|---|
| 10 | 7,346,026 | 1,902,676 | 5,013,364 | 4,984,386 |
| 20 | 1,230,241 | 996,985 | 1,132,996 | 1,595,666 |
| 100 | 60,376 | 189,206 | 59,443 | 222,805 |
| 1,000 | 56,450 | 208,546 | 56,999 | 240,402 |
| 10,000 | 2,830 | 38,446 | 2,726 | 49,699 |