diff --git a/FAQ.md b/FAQ.md
index 53a9812..14b39fa 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -13,6 +13,7 @@
   * [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