qclone

qclone

the fastest function for deep clone js objects compatible with es6

*according to the author, this cloning script is the fastest in the industry(watch benchmarks)

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npm install --save qclone

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const qclone = require('qclone');

or connect separate modules:

const qclone = require('qclone/qcloneStrictCircular');

``javascript
const newCloneObj = qclone({ foo: 1 });
`

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- support for all new classes ES6;
- very quickly clone(qclone);
- correctly clone(qcloneStrict / qcloneStrictCircular);
- support circular objects(qcloneCircular / qcloneStrictCircular);
- library has no dependencies;

The library contains four cloning functions: qclone, qcloneStrict, qcloneCircular, qcloneStrictCircular.

For more than 90% of cases, the algorithm is suitable - qclone.
If you lack it, for example, for cyclic objects or strict copying, you can use the following algorithms:

- qcloneStrict - for strict cloning(non-enumerable and Symbol properties);
- qcloneCircular - for cyclic objects (without strict cloning);
- qcloneStrictCircular - for strict cloning of cyclic objects;

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For more balanced testing of performance, tests of other projects were used

`
Nodejs - v13.3.0
Date - 22.01.2020
`

rfdc project test result

`
benchDeepCopy*100: 7776.478ms
benchLodashCloneDeep*100: 20040.199ms
benchFastCopy*100: 10990.298ms
benchRfdc*100: 4435.846ms
benchQclone*100: 3481.686ms
benchQcloneCircular*100: 5113.696ms
benchQcloneStrict*100: 47226.868ms
benchQcloneStrictCircular*100: 48079.723ms
benchRfdcProto*100: 4354.412ms
benchRfdcCircles*100: 5461.455ms
benchRfdcCirclesProto*100: 5541.977ms
`

fast-copy project test result

| Name | Ops / sec |
| -------------------- | --------- |
| qclone | 2,069.919 |
| qcloneCircular | 1,092.98 |
| fast-copy | 674.629 |
| lodash.cloneDeep | 323.661 |
| clone | 323.007 |
| ramda | 206.035 |
| deepclone | 175.292 |
| qcloneStrictCircular | 156.258 |
| fast-copy (strict) | 151.173 |
| fast-clone | 125.238 |
| qcloneStrict | 121.703 |


`
Nodejs - v14.9.0
Date - 01.10.2020
`

klona project test result

`
Benchmark :: json
JSON.stringify x 18,355 ops/sec ±0.68% (83 runs sampled)
lodash x 19,501 ops/sec ±0.53% (87 runs sampled)
rfdc x 90,519 ops/sec ±0.57% (88 runs sampled)
clone x 16,963 ops/sec ±0.33% (88 runs sampled)
clone/include x 9,343 ops/sec ±0.70% (90 runs sampled)
clone-deep x 52,055 ops/sec ±0.79% (89 runs sampled)
deep-copy x 51,496 ops/sec ±0.22% (87 runs sampled)
klona/full x 21,732 ops/sec ±0.24% (92 runs sampled)
klona x 114,363 ops/sec ±0.57% (89 runs sampled)
klona/lite x 127,689 ops/sec ±0.57% (88 runs sampled)
klona/json x 136,417 ops/sec ±0.23% (92 runs sampled)
qclone x 141,203 ops/sec ±0.41% (90 runs sampled)

Benchmark :: lite
lodash x 14,211 ops/sec ±0.36% (92 runs sampled)
clone x 14,738 ops/sec ±1.38% (87 runs sampled)
clone/include x 7,970 ops/sec ±0.67% (89 runs sampled)
clone-deep x 41,739 ops/sec ±0.47% (90 runs sampled)
klona/full x 18,371 ops/sec ±0.34% (89 runs sampled)
klona x 89,160 ops/sec ±0.42% (91 runs sampled)
klona/lite x 97,288 ops/sec ±0.65% (90 runs sampled)
qclone x 109,539 ops/sec ±0.27% (90 runs sampled)

*The next two tests below clone the keys for the Map class if those are objects. I do not consider this behavior to be correct, since the work for such keys is based on references and not values (most cloning libraries support my opinion).

Benchmark :: default
lodash x 14,529 ops/sec ±2.64% (82 runs sampled)
clone x 31,979 ops/sec ±0.35% (88 runs sampled)
clone/include x 18,751 ops/sec ±0.50% (87 runs sampled)
klona/full x 30,788 ops/sec ±1.00% (88 runs sampled)
klona x 77,617 ops/sec ±0.34% (91 runs sampled)
qclone x 169,658 ops/sec ±0.59% (90 runs sampled)

Benchmark :: full
lBenchmark :: full
lodash x 15,230 ops/sec ±3.17% (89 runs sampled)
clone/include x 13,651 ops/sec ±0.43% (86 runs sampled)
klona/full x 26,493 ops/sec ±2.05% (92 runs sampled)
qclone(qcloneStrict) x 39,462 ops/sec ±1.05% (90 runs sampled)
``

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MIT Yuriy Khomenko