What comes next is to find a stream-supported serializer routine. We start with a MemoryStream instance ( stream) just like a typical byte-output routine does. JsonSerializer.CreateDefault(options).Serialize(jsonWriter, obj) Using var jsonWriter = new JsonTextWriter(streamWriter) Using var streamWriter = new StreamWriter(stream) Static byte SerializeToUtf8Bytes(object obj, JsonSerializerSettings options) But, we can implement our own version of the SerializeToUtf8Bytes method: // Newtonsoft/JsonFileUtils.cs Newtonsoft, on the other hand, does not offer any direct way to do this. It provides the JsonSerializer.SerializeToUtf8Bytes method to get byte output directly. With the native library, this is just a two-liner code. We come up with the Utf8BytesWrite method in two steps: get serialized output directly in bytes and write the file accordingly. Var utf8Bytes = JsonSerializer.SerializeToUtf8Bytes(obj, _options) Public static void Utf8BytesWrite(object obj, string fileName) The difference is because we don’t need to convert bytes (as UTF-8) to strings (UTF-16): // Native/JsonFileUtils.cs We can serialize to UTF-8 bytes instead, which is about 5-10% faster than using the string-based methods. Writing UTF-8 Bytes Instead of UTF-16 Stringįirst and foremost, we want to avoid the expensive string (UTF-16) conversion. Let’s explore the options to handle these bottlenecks one by one.
Json data creator local machine full#
Buffers the full output in a local copy causing substantial memory overhead.Serializes to a string before writing to the file, causing performance cost for UTF-16 conversion.We now have a basic JSON-writing routine which is inefficient for several reasons: This should be the responsibility of the presenter program that we usually manage by a browser plugin or editor setting. Apart from that, “readability” is purely a display capability that should not generally dictate “storage” responsibility. The fact is it generates a lot of extra white spaces that affect the performance and the bandwidth. However, we should avoid pretty printing for the production code. Nice! The content is greatly readable now! JsonFileUtils.PrettyWrite(colleges, fileName) Once we use this PrettyWrite method: var colleges = SurveyReport.GetColleges() Then we call the appropriate Serialize overload. In contrast, Newtonsoft’s SerializeObject directly accepts Formatting.Indented option. Here, we can see the pretty-print variant of our previous routine.įor the native version, we instantiate a JsonSerializerOptions with its WriteIndented flag enabled.
Var jsonString = JsonConvert.SerializeObject(obj, Formatting.Indented, _options) Var jsonString = JsonSerializer.Serialize(obj, options) Var options = new JsonSerializerOptions(_options) Public static void PrettyWrite(object obj, string fileName) So, we want a better readable output file: // Native/JsonFileUtils.cs We will use this _options to produce a clean JSON output. Right at the top of each class, we configure a JsonSerializerOptions options ( JsonSerializerSettings for Newtonsoft) for ignoring null values. Var jsonString = JsonConvert.SerializeObject(obj, _options) Public static void SimpleWrite(object obj, string fileName) Private static readonly JsonSerializerOptions _options =
We are going to add two utility classes, one for each target JSON library, to hold our JSON-writing routines: // Native/JsonFileUtils.cs Public static List GetColleges() => new() And the SurveyReport class: public static class SurveyReport
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