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Converters

• JsonDefaultArrayConverter<>
  • Single-dimentional arrays
• JsonListOfTConverter<>
  • List
  • Types deriving from List
• JsonDictionaryOfStringTValueConverter<,>
  • Dictionary<string, TValue>
• Types deriving from Dictionary

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private static void HandleStartObject(JsonSerializerOptions options, ref ReadStack state)
{
    Debug.Assert(!state.Current.IsProcessingDictionary());

    if (state.Current.IsProcessingEnumerable())
    {
        // A nested object within an enumerable.
        Type objType = state.Current.GetElementType();
        state.Push();
        state.Current.Initialize(objType, options);

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private static void HandleStartDictionary(JsonSerializerOptions options, ref ReadStack state)
{
    Debug.Assert(!state.Current.IsProcessingEnumerable());

    JsonPropertyInfo jsonPropertyInfo = state.Current.JsonPropertyInfo;
    if (jsonPropertyInfo == null)
    {
        jsonPropertyInfo = state.Current.JsonClassInfo.CreateRootProperty(options);
    }

layomia

Some performance notes.

TLDR

• There's no significant performance impact on hot path (de)serialization i.e. primitives, objects, and enumerables.
• There's a little (~4.6% avg.) regression for deserializing Dictionary, IDictionary, and IReadOnlyDictionary. This is due to some necessary if-checks introduced in shared code-paths between non-immutable dicts and immutable dicts. Splitting their code-paths entirely might mitigate this, but is beyond the scope for preview 6. This will be targeted in preview 7.
• We might be able to improve the performance of (de)serializing ImmutableDicitonary, IImmutableDictionary, and ImmutableSortedDictionay by using IL emit to generate high performance CreateRange methods.

Hot-path deserialization and serialization use cases (Primitives, enumerables, objects)

These benchmarks live in the perf repo.

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Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.