This tries to benchmark different deep cloning libraries. This is a micro-benchmark, and that comes with caveats.
I use a nested object that mimics a Prebid bid.
Currently Prebid uses a very outdated version of just-clone. I wanted to update it, but decided to check for other and better alternatives that are faster and maybe use less memory.
I used the latest versions of the libraries.
- Node
- NPM
I use proto to manage my Node/NPM versions.
To get the same version that I am using, look into the .prototools file.
npm inpm run start
npm run start-browser- Open the link that shows up in console, the default one is one
Klona has consistently been the best.
just-clone prebid version is the version that prebid currently uses.
| Index | Task Name | ops/sec | Average Time (ns) | Margin | Samples |
|---|---|---|---|---|---|
| 0 | 'klona (json)' | '18,876' | 52974.84801610396 | '±0.30%' | 18877 |
| 1 | 'cloneDeep' | '9,449' | 105822.30772486977 | '±0.30%' | 9450 |
| 2 | 'nanoCopy' | '6,243' | 160155.17277822155 | '±0.49%' | 6245 |
| 3 | 'fastCopy' | '5,291' | 188976.84297051746 | '±0.41%' | 5292 |
| 4 | 'just-clone prebid version (v1)' | '3,455' | 289361.6163194379 | '±0.28%' | 3456 |
| 5 | 'copyAnything' | '3,064' | 326358.4564437056 | '±0.40%' | 3065 |
| 6 | 'structured-clone' | '2,916' | 342877.75934179034 | '±0.39%' | 2917 |
| 7 | 'lodash CloneDeep' | '2,879' | 347232.26136757986 | '±0.42%' | 2881 |
| 8 | 'json-parse-stringify' | '2,537' | 394109.38297872065 | '±7.14%' | 2538 |
| 9 | 'just-clone (v6)' | '2,499' | 400018.0847999996 | '±0.37%' | 2500 |
| 10 | 'ramda' | '391' | 2553004.711734691 | '±0.49%' | 392 |
