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Updated FAQ (markdown)

Benoît Blanchon
2016-06-06 08:40:28 +02:00
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FAQ.md

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* [How to compute the JSON length?](#how-to-compute-the-json-length)
* [How to create complex nested objects?](#how-to-create-complex-nested-objects)
* [The first serialization succeeds, why do the next ones fail?](#the-first-serialization-succeeds-why-do-the-next-ones-fail)
* [Why ArduinoJson is slow?](#why-arduinojson-is-slow)
* [Part 3 - Deserialization questions](#part-3---deserializationparsing-questions)
* [Can I parse data from a stream?](#can-i-parse-data-from-a-stream)
* [Should I call `parseArray()` or `parseObject()`?](#should-i-call-parsearray-or-parseobject)
@@ -359,7 +360,19 @@ See [The first parsing succeeds, why do the next ones fail?](#the-first-parsing-
### Why ArduinoJson is slow?
First of all, ArduinoJson is **not slow** by itself. It's slow when used in conjunction with the `WifiClient` from the ESP8266 core.
The problem is that there is no buffer between ArduinoJson and the WifiClient.
To solve this, either:
1. Enable the [Nagle algorithm](https://en.wikipedia.org/wiki/Nagle%27s_algorithm) on `WifiClient` by calling `setNoDelay(false)`.
2. Serialize to a buffer and send the whole buffer in one shot.
3. Insert a [BufferedPrint](https://github.com/bblanchon/ArduinoJson/wiki/Bag%20of%20Tricks#buffered-output) proxy between ArduinoJson and `WifiClient`.
See issue [#166](https://github.com/bblanchon/ArduinoJson/issues/166), [#271](https://github.com/bblanchon/ArduinoJson/issues/271) and [#301](https://github.com/bblanchon/ArduinoJson/issues/301)
## Part 3 - Deserialization/parsing questions