JsonArrayConst::memoryUsage()
Description
JsonArrayConst::memoryUsage() returns the number of bytes used by the array pointed by the JsonArrayConst.
Unlike JsonDocument::memoryUsage(), the result doesn’t include leaked memory.
Signature
size_t memoryUsage() const;
Example
char json[] = "[1,2,3]";
StaticJsonDocument<200> doc;
deserializeJson(doc, json);
doc.remove(2); // remove last element to show the effect of a leak
JsonArrayConst array = doc.as<JsonArray>();
Serial.println(array.memoryUsage()); // 16 on AVR
Serial.println(doc.memoryUsage()); // 24 on AVR
