← .NET Matrix · Open the interactive matrix →
System.Text.Json leads the current rating · 3 libraries · 14 scenarios
In every scenario the fastest library scores 100 points and the one allocating least scores 100 more; four times slower is half the points, and an unsupported scenario is worth nothing. Time and memory reach 1300 each here, so the maximum is 2600. See workflows/rating.md.
| # | Library | Scenarios | Time | Memory | Points | Group wins |
|---|---|---|---|---|---|---|
| 1 | System.Text.Json | 13/13 | 1163 | 1149 | 2312 | gold in Advanced, gold in Basic, gold in Collections, gold in Stream, silver in Nested, silver in Prepare |
| 2 | ServiceStack.Text | 12/13 | 1102 | 888 | 1990 | gold in Nested, gold in Prepare, silver in Advanced, silver in Basic, silver in Collections, silver in Stream |
| 3 | Newtonsoft.Json | 13/13 | 791 | 398 | 1189 | bronze in Advanced, bronze in Basic, bronze in Collections, bronze in Nested, bronze in Prepare, bronze in Stream |
How the points were earned — every scenario, with the measurements behind it
Each row is one scenario. Best is the lowest result among the rated libraries
that completed it, and the points follow from the two figures beside them:
100 × √((best + step) / (result + step)), with a step of 1 ns for time and 24 B
for memory. A dash means the library did not complete the scenario, and it scores
nothing for it. Add the two Points columns over every scenario and you get the
rating above. The same breakdown appears as a hint on any points value in the
application.
| Scenario | Time | Best | Points | Memory | Best | Points |
|---|---|---|---|---|---|---|
| Serialize Simple Object | 89.07 ns | 89.07 ns | 100 | 96 B | 96 B | 100 |
| Deserialize Simple Object | 124.25 ns | 106.16 ns | 92.5 | 64 B | 64 B | 100 |
| Serialize Nested Object | 207.47 ns | 207.47 ns | 100 | 504 B | 504 B | 100 |
| Deserialize Nested Object | 316.43 ns | 280.7 ns | 94.2 | 768 B | 320 B | 65.9 |
| Serialize Collection | 278.04 ns | 278.04 ns | 100 | 560 B | 560 B | 100 |
| Deserialize Collection | 470.5 ns | 384.13 ns | 90.4 | 800 B | 472 B | 77.6 |
| Serialize Dictionary | 101.01 ns | 100.35 ns | 99.7 | 88 B | 88 B | 100 |
| Deserialize Dictionary | 173.06 ns | 125.55 ns | 85.3 | 312 B | 312 B | 100 |
| Enum Round Trip | 161.96 ns | 161.96 ns | 100 | 88 B | 88 B | 100 |
| Custom Converter Round Trip | 166.19 ns | 166.19 ns | 100 | 120 B | 120 B | 100 |
| Polymorphic Round Trip | 1.14 μs | 1.14 μs | 100 | 1.32 KB | 1.32 KB | 100 |
| UTF-8 Stream Round Trip | 325.45 ns | 325.45 ns | 100 | 280 B | 280 B | 100 |
| Prepare Serializer | 11.57 μs | 0 ns | 0.93 | 7.45 KB | 0 B | 5.6 |
| Scenario | Time | Best | Points | Memory | Best | Points |
|---|---|---|---|---|---|---|
| Serialize Simple Object | 147.46 ns | 89.07 ns | 77.9 | 336 B | 96 B | 57.7 |
| Deserialize Simple Object | 106.16 ns | 106.16 ns | 100 | 112 B | 64 B | 80.4 |
| Serialize Nested Object | 321.17 ns | 207.47 ns | 80.4 | 792 B | 504 B | 80.4 |
| Deserialize Nested Object | 280.7 ns | 280.7 ns | 100 | 320 B | 320 B | 100 |
| Serialize Collection | 442.03 ns | 278.04 ns | 79.4 | 1000 B | 560 B | 75.5 |
| Deserialize Collection | 384.13 ns | 384.13 ns | 100 | 472 B | 472 B | 100 |
| Serialize Dictionary | 100.35 ns | 100.35 ns | 100 | 288 B | 88 B | 59.9 |
| Deserialize Dictionary | 125.55 ns | 125.55 ns | 100 | 424 B | 312 B | 86.6 |
| Enum Round Trip | 175.41 ns | 161.96 ns | 96.1 | 336 B | 88 B | 55.8 |
| Custom Converter Round Trip | 181.02 ns | 166.19 ns | 95.8 | 392 B | 120 B | 58.8 |
| Polymorphic Round Trip | — | 1.14 μs | 0 | — | 1.32 KB | 0 |
| UTF-8 Stream Round Trip | 617.02 ns | 325.45 ns | 72.7 | 2.8 KB | 280 B | 32.4 |
| Prepare Serializer | 0 ns | 0 ns | 100 | 0 B | 0 B | 100 |
| Scenario | Time | Best | Points | Memory | Best | Points |
|---|---|---|---|---|---|---|
| Serialize Simple Object | 200.42 ns | 89.07 ns | 66.9 | 1.41 KB | 96 B | 28.6 |
| Deserialize Simple Object | 311.51 ns | 106.16 ns | 58.6 | 2.61 KB | 64 B | 18.1 |
| Serialize Nested Object | 356.44 ns | 207.47 ns | 76.4 | 1.63 KB | 504 B | 55.9 |
| Deserialize Nested Object | 600.28 ns | 280.7 ns | 68.4 | 2.89 KB | 320 B | 34 |
| Serialize Collection | 487.07 ns | 278.04 ns | 75.6 | 1.83 KB | 560 B | 55.5 |
| Deserialize Collection | 958.75 ns | 384.13 ns | 63.3 | 2.99 KB | 472 B | 40.1 |
| Serialize Dictionary | 191.88 ns | 100.35 ns | 72.5 | 1.48 KB | 88 B | 27 |
| Deserialize Dictionary | 310.54 ns | 125.55 ns | 63.7 | 2.83 KB | 312 B | 33.9 |
| Enum Round Trip | 636.24 ns | 161.96 ns | 50.6 | 4.68 KB | 88 B | 15.2 |
| Custom Converter Round Trip | 564.08 ns | 166.19 ns | 54.4 | 4.68 KB | 120 B | 17.3 |
| Polymorphic Round Trip | 2.24 μs | 1.14 μs | 71.3 | 7.79 KB | 1.32 KB | 41.5 |
| UTF-8 Stream Round Trip | 689.92 ns | 325.45 ns | 68.7 | 4.13 KB | 280 B | 26.8 |
| Prepare Serializer | 25.87 μs | 0 ns | 0.622 | 11.57 KB | 0 B | 4.497 |
Basic
 |
Newtonsoft.Json 13.0.4 A mature JSON framework for .NET with configurable contracts, converters, and streaming readers and writers. |
Compare → |
 |
ServiceStack.Text 10.4.2 A high-performance text library with typed JSON, stream, collection, and type-specific serialization APIs. |
Compare → |
 |
System.Text.Json The reflection-based and source-generated JSON serializer included with .NET. |
Compare → |
Serializes one scalar object to a compact JSON string.
Deserializes one compact JSON object and validates every scalar member.
Serializes an order, customer, and address object graph.
Deserializes and materializes an order, customer, and address object graph.
Serializes three ordered objects to a compact JSON array.
Deserializes a compact JSON array to three ordered objects.
Serializes three ordered string and integer entries to a JSON object.
Deserializes a JSON object to three ordinal string and integer entries.
Serializes an enum as its string name and deserializes it back.
Serializes a strongly typed identifier as a JSON string and deserializes it back.
Round-trips a base-type collection through safe cat and dog discriminators.
Serializes a simple object to a new UTF-8 memory stream and deserializes it back.
Round-trips a simple object with compile-time generated JSON metadata.
Not rated: With this few rated entrants, the reference is a library's own result, not a result earned against a competitor, so the full 200 points would not reflect a win. (1 of 3 rated libraries support this.)
Creates fresh serializer settings and explicit type metadata without serializing data.
