The JSON Serialization Benchmark is a console application with a purpose (as the name describes) to test the performance of the various JSON serializers that exists out there.

The results may vary for different datasets/test objects, thus the application purpose is NOT to conclude which one is better, as it cannot do so, it is just a simple experiment of mine. Moreover performance is not the only factor which one should consider in order to choose a serializer.

* Console Application should be run in RELEASE mode.
** If you do not have installed R, comment out this line

Libaries used

• BenchmarkDotNet
• Bogus

Serializers tested

• Newtonsoft
• ServiceStack
• System.Text.Json
• Jil
• Utf8Json

Object under serialization

Custom object can be found here.

Results

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19042
Intel Core i5-4670K CPU 3.40GHz (Haswell), 1 CPU, 4 logical and 4 physical cores
.NET Core SDK=3.1.403
  [Host]     : .NET Core 3.1.9 (CoreCLR 4.700.20.47201, CoreFX 4.700.20.47203), X64 RyuJIT
  DefaultJob : .NET Core 3.1.9 (CoreCLR 4.700.20.47201, CoreFX 4.700.20.47203), X64 RyuJIT

NElements refers to the number of objects that are inserted in the list that is serialized.

Method	NElements	Mean	Error	StdDev	Median
Newtonsoft	10	1,464.5 μs	29.26 μs	41.97 μs	1,475.8 μs
ServiceStack	10	1,712.7 μs	34.23 μs	81.34 μs	1,653.1 μs
SysTextJson	10	1,391.5 μs	5.92 μs	5.54 μs	1,389.8 μs
Utf8Json	10	713.0 μs	6.11 μs	5.71 μs	711.6 μs
Jil	10	777.4 μs	15.41 μs	27.00 μs	785.4 μs
Newtonsoft	100	13,046.2 μs	171.10 μs	142.88 μs	13,031.3 μs
ServiceStack	100	15,889.7 μs	156.26 μs	146.17 μs	15,864.3 μs
SysTextJson	100	12,662.1 μs	25.18 μs	23.55 μs	12,660.2 μs
Utf8Json	100	6,810.3 μs	22.08 μs	20.65 μs	6,808.8 μs
Jil	100	6,715.7 μs	131.64 μs	161.66 μs	6,668.2 μs
Newtonsoft	1000	153,129.4 μs	3,019.71 μs	5,889.71 μs	155,266.0 μs
ServiceStack	1000	164,569.5 μs	1,004.47 μs	939.58 μs	164,393.8 μs
SysTextJson	1000	135,658.3 μs	398.07 μs	372.36 μs	135,681.9 μs
Utf8Json	1000	75,579.3 μs	1,064.30 μs	943.48 μs	75,734.3 μs
Jil	1000	63,892.1 μs	1,086.30 μs	1,016.13 μs	63,829.5 μs
Newtonsoft	10000	1,460,715.0 μs	3,676.09 μs	3,069.70 μs	1,460,992.4 μs
ServiceStack	10000	1,678,962.9 μs	5,128.65 μs	4,546.41 μs	1,678,895.9 μs
SysTextJson	10000	1,560,747.4 μs	10,022.51 μs	9,375.06 μs	1,557,973.6 μs
Utf8Json	10000	838,690.7 μs	6,651.15 μs	6,221.49 μs	839,498.0 μs
Jil	10000	683,038.8 μs	5,818.18 μs	5,442.33 μs	682,807.2 μs

Source code layout

SerializationBenchmark/
├── Program.cs
├── Data/
|   ├── MockData.cs
├── Serialization/
│   ├── Base/
│   |   ├── ISerializationTest.cs
│   |   ├── SerializerTest.cs
│   ├── Implementation/
│   |   ├── JilSerializer.cs
│   |   ├── NewtonsoftSerializer.cs
│   |   ├── ServiceStackSerializer.cs
│   |   ├── SystemTextJsonSerializer.cs
│   |   ├── Utf8JsonSerializer.cs
├── Types/
│   ├── BaseTestObject.cs
│   ├── MainTestObject.cs
│   ├── TestEnum.cs

Authors

• Kompis Panagiotis

License

This project is licensed under the MIT License see the LICENSE.md file for details.