BenchmarkResult.md

Performance benchmarks

This document provides an overview of performance benchmarks for various operations. The benchmarks compare different implementations to help you understand the performance characteristics of each approach. In the following benchmarks:

• Span*** refers to SpanLinq.SpanEnumerable.***
• System*** refers to System.Linq.Enumerable.***
• Handcrafted*** refers to optimized code that uses Span directly.

These comparisons will help you evaluate the performance differences between standard LINQ operations, SpanLinq implementations, and hand-optimized code using Span.

• Performance benchmarks
• System settings
• Results
  • Aggregate
  • AggregateBy
  • All
  • Any
  • Append
  • AsEnumerable
  • Average
  • Cast
  • Chunk
  • Concat
  • Contains
  • Count
  • CountBy
  • DefaultIfEmpty
  • Distinct
  • DistinctBy
  • ElementAt
  • ElementAtOrDefault
  • Except
  • ExceptBy
  • First
  • FirstOrDefault
  • ForEach
  • GroupBy
  • GroupJoin
  • Index
  • Intersect
  • IntersectBy
  • Join
  • Last
  • LastOrDefault
  • LongCount
  • Max
  • MaxBy
  • Min
  • MinBy
  • OfType
  • Order
  • OrderBy
  • Prepend
  • Range
  • Repeat
  • Reverse
  • Select
  • SelectMany
  • SequenceEqual
  • Shuffle
  • Single
  • SingleOrDefault
  • Skip
  • SkipWhile
  • SkipWhile
  • Sum
  • Take
  • TakeLast
  • TakeWhile
  • ThenBy
  • ToArray
  • ToDictionary
  • ToHashSet
  • ToList
  • ToLookup
  • TryGetNonEnumeratedCount
  • Union
  • UnionBy
  • Where
  • Zip

System settings

System settings provide crucial information about the environment in which benchmarks or tests are run. These details are essential for understanding the context of performance measurements and ensuring reproducibility of results. In this case, the system settings are as follows:

BenchmarkDotNet v0.13.12, Windows 11 (10.0.22631.4317/23H2/2023Update/SunValley3)
13th Gen Intel Core i9-13905H, 1 CPU, 20 logical and 14 physical cores
.NET SDK 9.0.100-rc.2.24474.11
  [Host]     : .NET 9.0.0 (9.0.24.47305), X64 RyuJIT AVX2
  DefaultJob : .NET 9.0.0 (9.0.24.47305), X64 RyuJIT AVX2

When reviewing benchmarks or performance data, always consider these system settings to make informed decisions about your software's performance characteristics.

Results

Aggregate

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Aggregate	SystemAggregate	263.7590 ns	1.2553 ns	1.1128 ns	-	-	-
Aggregate	SpanAggregate	619.7651 ns	1.4326 ns	1.3400 ns	-	-	-

AggregateBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
AggregateBy	SystemAggregateBy	3,057.8180 ns	20.8334 ns	19.4875 ns	0.0267	-	368 B
AggregateBy	SpanAggregateBy	5,989.4566 ns	21.3168 ns	19.9398 ns	-	-	-

All

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
All	SystemAll	203.8615 ns	0.2724 ns	0.2548 ns	-	-	-
All	SpanAll	518.0548 ns	2.1874 ns	1.9391 ns	-	-	-

Any

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Any	SystemAny	205.5439 ns	0.1604 ns	0.1339 ns	-	-	-
Any	SpanAny	516.7499 ns	1.6940 ns	1.5016 ns	-	-	-

Append

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Append	SpanAppend	532.3850 ns	9.4246 ns	8.8158 ns	-	-	-
Append	SystemAppend	1,502.3679 ns	13.0312 ns	12.1894 ns	0.0057	-	88 B

AsEnumerable

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
AsEnumerable	SystemAsEnumerable	546.0603 ns	2.0265 ns	1.8956 ns	0.0019	-	32 B
AsEnumerable	SpanAsEnumerable	1,301.6000 ns	9.9575 ns	9.3143 ns	0.0019	-	32 B

Average

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Average	SystemAverage	77.6144 ns	0.0706 ns	0.0589 ns	-	-	-
Average	SpanAverage	669.5447 ns	2.5918 ns	2.2975 ns	-	-	-

Cast

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Cast	SpanCastIntToNullableInt	1,004.6952 ns	2.3091 ns	2.1599 ns	-	-	-
Cast	SpanCastClass	1,204.0367 ns	2.5576 ns	2.3924 ns	-	-	-
Cast	SpanCastIntToObject	2,871.0990 ns	24.2749 ns	20.2707 ns	1.9569	-	24576 B
Cast	SystemCastClass	2,945.3580 ns	6.1851 ns	4.8290 ns	-	-	32 B
Cast	SystemCastIntToNullableInt	17,648.1809 ns	49.0119 ns	40.9271 ns	1.9531	-	24656 B
Cast	SystemCastIntToObject	19,376.9764 ns	175.7687 ns	155.8143 ns	1.9531	-	24656 B

Chunk

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Chunk	SystemChunk	704.1107 ns	2.3762 ns	1.9843 ns	0.5283	-	6632 B
Chunk	HandcraftedChunk	853.0973 ns	7.8673 ns	7.3591 ns	0.5922	0.0019	7440 B
Chunk	SpanChunk	1,136.6704 ns	12.9198 ns	12.0852 ns	0.5283	-	6632 B

Concat

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Concat	SystemConcat	3,456.7250 ns	18.5042 ns	17.3088 ns	0.0076	-	120 B
Concat	SpanConcat	6,078.0059 ns	18.3870 ns	17.1992 ns	-	-	-

Contains

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Contains	SpanContains	47.2104 ns	0.2871 ns	0.2685 ns	-	-	-
Contains	SystemContains	48.7280 ns	0.1415 ns	0.1323 ns	-	-	-
Contains	HandcraftedContains	51.6118 ns	0.3134 ns	0.2931 ns	-	-	-

Count

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Count	SpanCount	1.0380 ns	0.0112 ns	0.0099 ns	-	-	-
Count	SystemCount	1.6181 ns	0.0098 ns	0.0082 ns	-	-	-
Count	SystemCountPredicate	461.9095 ns	0.5679 ns	0.4742 ns	-	-	-
Count	SpanCountPredicate	776.3301 ns	3.2094 ns	3.0021 ns	-	-	-

CountBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
CountBy	SystemCountBy	3,026.6075 ns	52.5966 ns	46.6255 ns	0.0267	-	344 B
CountBy	SpanCountBy	5,955.2957 ns	49.7902 ns	46.5738 ns	-	-	-

DefaultIfEmpty

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
DefaultIfEmpty	SpanDefaultIfEmpty	2.1175 ns	0.0185 ns	0.0173 ns	-	-	-
DefaultIfEmpty	SystemDefaultIfEmpty	9.1914 ns	0.1522 ns	0.1424 ns	0.0038	-	48 B

Distinct

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Distinct	SpanDistinct	4,711.3708 ns	26.0185 ns	24.3377 ns	-	-	-
Distinct	SystemDistinct	7,984.9707 ns	71.5405 ns	66.9190 ns	4.6692	0.7629	58656 B

DistinctBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
DistinctBy	SpanDistinctBy	3,426.4758 ns	10.6587 ns	9.9702 ns	-	-	-
DistinctBy	SystemDistinctBy	3,501.2782 ns	17.2963 ns	16.1789 ns	0.0267	-	360 B

ElementAt

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ElementAt	SpanElementAt	5.6168 ns	0.0093 ns	0.0087 ns	-	-	-
ElementAt	SystemElementAt	8.1542 ns	0.0250 ns	0.0222 ns	-	-	-

ElementAtOrDefault

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ElementAtOrDefault	SpanElementAtOrDefault	5.6363 ns	0.0101 ns	0.0094 ns	-	-	-
ElementAtOrDefault	SystemElementAtOrDefault	9.1710 ns	0.0744 ns	0.0696 ns	-	-	-

Except

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Except	SystemExcept	6,760.1889 ns	23.0700 ns	21.5797 ns	1.4267	0.0839	17928 B
Except	SpanExcept	9,173.2855 ns	67.3236 ns	59.6806 ns	-	-	-

ExceptBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ExceptBy	SystemExceptBy	7,120.8045 ns	30.3109 ns	28.3528 ns	1.4267	0.0839	17944 B
ExceptBy	SpanExceptBy	9,713.0089 ns	43.3841 ns	38.4589 ns	-	-	-

First

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
First	SystemFirst	202.1929 ns	1.0632 ns	0.9945 ns	-	-	-
First	SpanFirst	538.0269 ns	4.5352 ns	4.2422 ns	-	-	-

FirstOrDefault

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
FirstOrDefault	SystemFirstOrDefault	201.5848 ns	0.8736 ns	0.8172 ns	-	-	-
FirstOrDefault	SpanFirstOrDefault	536.8293 ns	3.0228 ns	2.8275 ns	-	-	-

ForEach

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ForEach	SpanForEach	286.7086 ns	1.3312 ns	1.2452 ns	-	-	-

GroupBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
GroupBy	SystemGroupBy	5,417.7638 ns	40.4992 ns	35.9015 ns	2.2736	0.1221	28536 B
GroupBy	SpanGroupBy	7,010.1171 ns	36.6301 ns	34.2638 ns	0.6104	-	7680 B

GroupJoin

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
GroupJoin	SystemGroupJoin	18,069.7385 ns	353.5799 ns	447.1654 ns	9.7961	3.2349	123216 B
GroupJoin	SpanGroupJoin	366,121.8164 ns	4,961.3019 ns	4,640.8049 ns	-	-	1 B

Index

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Index	SpanIndex	992.5626 ns	6.4616 ns	6.0441 ns	-	-	-
Index	SystemIndex	4,984.6546 ns	19.4658 ns	17.2559 ns	0.0076	-	96 B

Intersect

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Intersect	SystemIntersect	8,071.1188 ns	26.4233 ns	23.4235 ns	1.4191	0.0763	17928 B
Intersect	SpanIntersect	12,262.3406 ns	51.8240 ns	48.4762 ns	-	-	-

IntersectBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
IntersectBy	SystemIntersectBy	8,180.2696 ns	23.7984 ns	22.2610 ns	1.4191	0.0763	17944 B
IntersectBy	SpanIntersectBy	12,323.0880 ns	62.9273 ns	58.8622 ns	-	-	-

Join

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Join	SystemJoin	19,863.5886 ns	363.5899 ns	322.3130 ns	9.7961	3.2349	123232 B
Join	SpanJoin	366,218.0176 ns	3,916.5341 ns	3,471.9054 ns	-	-	1 B

Last

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Last	SpanLast	540.5032 ns	5.1719 ns	4.8378 ns	-	-	-
Last	SystemLast	1,549.1517 ns	9.2850 ns	8.6852 ns	-	-	-

LastOrDefault

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
LastOrDefault	SpanLastOrDefault	552.7688 ns	5.2571 ns	4.9175 ns	-	-	-
LastOrDefault	SystemLastOrDefault	1,544.6631 ns	1.5835 ns	1.3223 ns	-	-	-

LongCount

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
LongCount	SpanLongCount	1.0552 ns	0.0148 ns	0.0131 ns	-	-	-
LongCount	SystemLongCount	327.4581 ns	1.0545 ns	0.9864 ns	0.0024	-	32 B
LongCount	SpanLongCountPredicate	780.7307 ns	4.5959 ns	4.2990 ns	-	-	-
LongCount	SystemLongCountPredicate	883.7892 ns	1.7051 ns	1.5950 ns	0.0019	-	32 B

Max

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Max	SystemMax	31.3130 ns	0.1012 ns	0.0897 ns	-	-	-
Max	SpanMax	676.7271 ns	1.5084 ns	1.3372 ns	-	-	-

MaxBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
MaxBy	SystemMaxBy	551.1732 ns	1.2848 ns	1.2018 ns	0.0019	-	32 B
MaxBy	SpanMaxBy	904.5342 ns	4.1002 ns	3.8353 ns	-	-	-

Min

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Min	SystemMin	31.0749 ns	0.0478 ns	0.0423 ns	-	-	-
Min	SpanMin	720.0131 ns	2.9890 ns	2.7959 ns	-	-	-

MinBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
MinBy	SystemMinBy	503.8157 ns	2.9883 ns	2.6490 ns	0.0019	-	32 B
MinBy	SpanMinBy	880.3269 ns	5.0001 ns	4.1753 ns	-	-	-

OfType

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
OfType	SpanOfTypeIntToNullableInt	1,008.5285 ns	4.3652 ns	3.6452 ns	-	-	-
OfType	SpanOfTypeClass	1,546.2598 ns	10.3828 ns	9.7121 ns	-	-	-
OfType	SpanOfTypeIntToObject	3,057.9873 ns	18.0221 ns	15.9761 ns	1.9569	-	24576 B
OfType	SystemOfTypeClass	4,606.9921 ns	35.0832 ns	32.8168 ns	-	-	80 B
OfType	SystemOfTypeIntToObject	19,414.6761 ns	73.7471 ns	65.3749 ns	1.9531	-	24656 B
OfType	SystemOfTypeIntToNullableInt	20,383.4671 ns	86.0605 ns	76.2904 ns	1.9531	-	24656 B

Order

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Order	SystemOrder	3,030.4275 ns	57.3146 ns	66.0035 ns	0.3319	-	4176 B
Order	SystemOrderDescending	8,017.2544 ns	34.4015 ns	30.4960 ns	0.3204	-	4176 B
Order	SpanOrder	29,761.6776 ns	150.7767 ns	141.0367 ns	-	-	-
Order	SpanOrderDescending	31,051.3485 ns	168.7872 ns	157.8836 ns	-	-	-

OrderBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
OrderBy	SystemOrderBy	7,615.4615 ns	27.2201 ns	24.1299 ns	0.9918	0.0305	12568 B
OrderBy	SystemOrderByDescending	12,569.8716 ns	99.9335 ns	93.4778 ns	0.9918	0.0305	12568 B
OrderBy	SpanOrderBy	29,029.4724 ns	145.1164 ns	135.7420 ns	-	-	-
OrderBy	SpanOrderByDescending	31,094.9064 ns	168.6357 ns	157.7419 ns	-	-	-

Prepend

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Prepend	SpanPrepend	489.8280 ns	5.0062 ns	4.6828 ns	-	-	-
Prepend	SystemPrepend	1,483.7582 ns	11.7768 ns	11.0161 ns	0.0057	-	88 B

Range

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Range	SpanRange	201.6353 ns	0.7508 ns	0.7023 ns	-	-	-
Range	HandcraftedRange	304.5505 ns	2.7191 ns	2.5435 ns	0.3281	-	4120 B
Range	SystemRange	420.9398 ns	1.3013 ns	1.1536 ns	0.0029	-	40 B

Repeat

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Repeat	SpanRepeat	201.6920 ns	0.6525 ns	0.5784 ns	-	-	-
Repeat	SystemRepeat	435.2726 ns	3.3130 ns	3.0990 ns	0.0024	-	32 B

Reverse

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Reverse	HandcraftedReverse	397.4128 ns	3.1328 ns	2.9304 ns	0.3281	-	4120 B
Reverse	SystemReverse	840.4237 ns	6.5786 ns	6.1537 ns	0.3319	-	4168 B
Reverse	SpanReverse	1,513.4816 ns	23.7059 ns	22.1745 ns	-	-	-

Select

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Select	SpanSelect	596.0356 ns	3.5300 ns	3.3019 ns	-	-	-
Select	SystemSelect	690.0395 ns	4.4146 ns	4.1294 ns	0.0038	-	48 B

SelectMany

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
SelectMany	SystemSelectMany	1,677,120.1172 ns	5,617.6069 ns	4,979.8622 ns	1.9531	-	41057 B
SelectMany	SpanSelectMany	2,526,526.1719 ns	15,733.4421 ns	14,717.0715 ns	-	-	3 B

SequenceEqual

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
SequenceEqual	SystemSequenceEqual	1.6329 ns	0.0076 ns	0.0071 ns	-	-	-
SequenceEqual	SpanSequenceEqual	1.8938 ns	0.0065 ns	0.0058 ns	-	-	-
SequenceEqual	SystemSequenceEqualSequence	487.2647 ns	2.3494 ns	1.9619 ns	0.0057	-	80 B
SequenceEqual	SpanSequenceEqualSequence	502.7118 ns	1.3745 ns	1.2184 ns	-	-	-

Shuffle

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Shuffle	HandcraftedShuffle	1,996.9715 ns	5.5126 ns	4.8868 ns	-	-	-
Shuffle	SpanShuffle	4,411.9480 ns	12.3245 ns	10.9254 ns	-	-	-

Single

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Single	SystemSingle	212.9015 ns	2.5639 ns	2.3982 ns	-	-	-
Single	SpanSingle	520.0386 ns	1.5505 ns	1.4503 ns	-	-	-

SingleOrDefault

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
SingleOrDefault	SystemSingleOrDefault	201.7537 ns	0.2671 ns	0.2085 ns	-	-	-
SingleOrDefault	SpanSingleOrDefault	512.0498 ns	5.2074 ns	4.3484 ns	-	-	-

Skip

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Skip	SpanSkip	4.3893 ns	0.0312 ns	0.0292 ns	-	-	-
Skip	SystemSkip	15.2481 ns	0.1693 ns	0.1583 ns	0.0038	-	48 B

SkipWhile

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
SkipLast	SpanSkipLast	3.8173 ns	0.0213 ns	0.0199 ns	-	-	-
SkipLast	SystemSkipLast	30.5432 ns	0.1212 ns	0.1074 ns	0.0108	-	136 B

SkipWhile

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
SkipWhile	SystemSkipWhile	889.5269 ns	2.5934 ns	2.4259 ns	0.0076	-	104 B
SkipWhile	SpanSkipWhile	1,018.9567 ns	2.9049 ns	2.7172 ns	-	-	-

Sum

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Sum	SystemSum	59.8201 ns	0.2753 ns	0.2575 ns	-	-	-
Sum	SpanSum	669.4016 ns	9.2260 ns	8.6300 ns	-	-	-

Take

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Take	SpanTake	493.7533 ns	1.4328 ns	1.2702 ns	-	-	-
Take	SystemTake	3,472.1362 ns	19.6271 ns	18.3592 ns	0.0038	-	48 B

TakeLast

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
TakeLast	SpanTakeLast	1,234.4180 ns	10.2318 ns	9.0702 ns	-	-	-
TakeLast	SystemTakeLast	5,347.0905 ns	61.0954 ns	57.1486 ns	0.0076	-	136 B

TakeWhile

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
TakeWhile	SpanTakeWhile	2,045.9239 ns	18.9414 ns	16.7910 ns	-	-	-
TakeWhile	SystemTakeWhile	2,327.1187 ns	13.3748 ns	11.8564 ns	0.0076	-	104 B

ThenBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ThenBy	SystemThenByDescending	14,537.3040 ns	119.0894 ns	111.3963 ns	1.6632	0.0916	20928 B
ThenBy	SystemThenBy	14,588.9819 ns	82.5623 ns	77.2288 ns	1.6632	0.0916	20928 B
ThenBy	SpanThenBy	47,443.0465 ns	292.1843 ns	273.3094 ns	-	-	-
ThenBy	SpanThenByDescending	48,341.7570 ns	317.5585 ns	297.0444 ns	-	-	-

ToArray

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ToArray	SystemToArray	158.4132 ns	1.7688 ns	1.6545 ns	0.3314	-	4160 B
ToArray	SpanToArray	516.0287 ns	4.3198 ns	4.0408 ns	0.3281	-	4120 B

ToDictionary

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ToDictionary	SystemToDictionary	3,373.3929 ns	22.4903 ns	21.0374 ns	1.7662	0.1335	22192 B
ToDictionary	SpanToDictionary	3,529.4652 ns	14.7830 ns	13.8280 ns	1.7662	0.1335	22192 B

ToHashSet

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ToHashSet	SpanToHashSet	3,103.9075 ns	13.1026 ns	11.6151 ns	1.4153	-	17768 B
ToHashSet	SystemToHashSet	3,789.1108 ns	14.6475 ns	12.9846 ns	1.4153	0.0877	17800 B

ToList

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ToList	SpanToList	133.3044 ns	1.4048 ns	1.2453 ns	0.3307	-	4152 B
ToList	SystemToList	134.0427 ns	1.3452 ns	1.2583 ns	0.3307	-	4152 B

ToLookup

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
ToLookup	SystemToLookup	15,101.9338 ns	180.3529 ns	140.8077 ns	9.7961	2.5024	123040 B
ToLookup	SpanToLookup	19,453.4567 ns	371.3411 ns	412.7447 ns	9.7961	2.4719	123056 B

TryGetNonEnumeratedCount

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
TryGetNonEnumeratedCount	SpanTryGetNonEnumeratedCount	0.0116 ns	0.0052 ns	0.0043 ns	-	-	-
TryGetNonEnumeratedCount	SystemTryGetNonEnumeratedCount	2.4207 ns	0.0244 ns	0.0229 ns	-	-	-

Union

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Union	SystemUnion	10,866.0875 ns	87.5037 ns	73.0695 ns	4.6692	0.7629	58696 B
Union	SpanUnion	12,573.6170 ns	21.2408 ns	19.8687 ns	-	-	-

UnionBy

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
UnionBy	SystemUnionBy	11,812.2918 ns	91.7217 ns	81.3089 ns	4.6692	0.7629	58736 B
UnionBy	SpanUnionBy	14,351.1039 ns	58.7057 ns	54.9134 ns	-	-	-

Where

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Where	HandcraftedWhere	302.4339 ns	1.8610 ns	1.7408 ns	0.1650	-	2072 B
Where	SystemWhere	811.7876 ns	3.1324 ns	2.7768 ns	0.0038	-	48 B
Where	SpanWhere	841.1094 ns	5.1144 ns	4.7840 ns	-	-	-

Zip

Type	Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Zip	SystemZip	5,031.0802 ns	34.9817 ns	32.7219 ns	0.0076	-	144 B
Zip	SpanZip	5,829.9393 ns	38.1152 ns	33.7882 ns	-	-	-