JsonVariant::memoryUsage()
Description
JsonVariant::memoryUsage() returns the number of bytes used by the value pointed by the JsonVariant.
Unlike JsonDocument::memoryUsage(), the result doesn’t include leaked memory.
Signature
size_t memoryUsage() const; Example
char json[] = "{\"a\":1,\"b\":2}"; StaticJsonDocument<200> doc; deserializeJson(doc, json); doc.remove("b"); // remove last member to show the effect of a leak JsonVariant var = doc.as<JsonVariant>(); Serial.println(var.memoryUsage()); // 10 on AVR Serial.println(doc.memoryUsage()); // 16 on AVR 