README.bun.md

JS Deep Clone Benchmark for Bun

This is a benchmark for JS deep clone libraries for Bun.

Benchmark Results

for Node please refer to Node

cpu: 13th Gen Intel(R) Core(TM) i5-13400F

runtime: bun 1.4.0 (x64-win32)

json

Library	small (ops/s)	large (ops/s)
@ungap/structured-clone	36,751	3,392
clone	27,559	526
clone-deep	71,551	1,087
clone(circular)	24,673	4,163
copy-anything	36,701	633
core-js/structured-clone	15,894	2,079
deepcopy	13,079	1,560
es-toolkit.cloneDeep	44,437	6,825
fast-copy	61,437	15,934
fastest-json-copy	116,904	2,212
JSON.stringify/parse	49,458	891
jsondiffpatch.clone	96,953	1,532
just-clone	23,774	405
klona	84,990	1,490
klona/json	96,583	1,643
klona/lite	86,722	1,461
lodash.cloneDeep	24,612	1,314
nano-copy	73,484	6,697
nanoclone	79,342	8,474
plain-object-clone	33,649	570
ramda.clone	11,218	714
rfdc	43,499	755
rfdc(circles)	43,260	742
structuredClone	37,456	3,621

json-circular

Library	small (ops/s)	large (ops/s)
@ungap/structured-clone	497,764	689
clone(circular)	1,025,870	317
core-js/structured-clone	439,777	301
deepcopy	497,434	287
es-toolkit.cloneDeep	1,794,500	1,313
fast-copy	5,300,263	3,077
lodash.cloneDeep	1,014,870	60
nano-copy	4,233,332	2,759
nanoclone	2,751,828	1,950
ramda.clone	357,821	63
rfdc(circles)	4,131,779	1,193
structuredClone	512,315	701

regexp

Library	small (ops/s)	large (ops/s)
@ungap/structured-clone	79,272	10,692
clone	64,828	961
clone-deep	130,782	1,233
clone(circular)	60,648	5,719
core-js/structured-clone	43,051	5,032
deepcopy	34,421	3,464
es-toolkit.cloneDeep	108,703	11,362
fast-copy	120,040	11,834
jsondiffpatch.clone	100,893	1,454
just-clone	85,419	1,308
klona	183,041	2,627
klona/lite	184,274	2,630
lodash.cloneDeep	38,541	2,616
nano-copy	220,459	18,005
nanoclone	261,512	19,091
ramda.clone	43,845	4,061
rfdc(with RegExp)	144,393	2,118
structuredClone	80,026	10,893

date

Library	small (ops/s)	large (ops/s)
@ungap/structured-clone	55,442	15,423
clone	66,139	861
clone-deep	107,117	1,107
clone(circular)	58,993	8,296
core-js/structured-clone	18,881	3,114
deepcopy	19,219	3,954
es-toolkit.cloneDeep	84,621	23,453
fast-copy	148,577	18,911
jsondiffpatch.clone	121,200	2,259
just-clone	48,109	971
klona	80,184	1,574
klona/lite	76,551	1,546
lodash.cloneDeep	26,606	2,647
nano-copy	80,256	21,086
nanoclone	93,377	24,021
ramda.clone	21,093	3,870
rfdc	95,010	1,708
rfdc(circles)	93,953	1,707
structuredClone	54,069	15,453

custom-class

Library	small (ops/s)	large (ops/s)
clone	784,777	2,317
clone(circular)	672,830	1,373
es-toolkit.cloneDeep	962,993	2,693
fast-copy	1,377,131	3,908
klona	2,262,869	6,792
klona/lite	2,378,805	6,922
lodash.cloneDeep	656,696	366
nano-copy	2,758,116	7,854
ramda.clone	250,187	375
rfdc(with Custom Classes)	2,052,376	4,617

array-buffer

Library	small (ops/s)	large (ops/s)
@ungap/structured-clone	38,074	18
core-js/structured-clone	51,557	128
es-toolkit.cloneDeep	64,906	37
fast-copy	90,922	100
klona	87,165	105
nano-copy	67,713	115
rfdc(with ArrayBuffer)	67,441	121
structuredClone	41,375	16

buffer

Library	small (ops/s)	large (ops/s)
clone	136,153	137
clone(circular)	131,346	142
deepcopy	47,931	70
klona	138,828	127
nano-copy	136,750	136
rfdc	142,955	138
rfdc(circles)	147,757	136

buffer-zero-copy

Library	small (ops/s)	large (ops/s)
es-toolkit.cloneDeep	782,057	821,810
lodash.cloneDeep	646,036	661,158

map-set

Library	small (ops/s)	large (ops/s)
@ungap/structured-clone	90,574	9,788
clone	266,253	32,864
clone(circular)	241,599	25,775
core-js/structured-clone	46,099	5,230
deepcopy	49,601	5,129
es-toolkit.cloneDeep	213,890	24,154
fast-copy	337,568	33,538
just-clone	87,981	16,714
klona	232,693	40,525
lodash.cloneDeep	94,685	7,124
nano-copy	139,868	13,933
nanoclone	293,362	30,974
rfdc	78,399	9,771
rfdc(circles)	79,213	9,337
structuredClone	90,130	9,737