About thingspeak read and write delay problem | Arduino | Forum

Hello,
I have a question about the delay of reading or writing on THINGSPEAK.
The code is about turning on the LED by reading the value on THINGSPEAK. After 10 seconds, the LED is turned off, but it takes about 5 seconds to read the value on the thingspeak, and then the value on the thingspeak is also rewritten also took 5 seconds.
Is this delay normal? Because the official indication is that the transmission time is 1 second.
Here is my code
********************************
#include
#include
#include

//Replace your wifi credentials here

const char* ssid = "xxxxxxxxxxxxxxxx";
const char* password = "xxxxxxxxxxxxxxxxxx";

//change your channel number here
unsigned long myChannelNumber =xxxxxxxxxxxx;
const char * myWriteAPIKey = "xxxxxxxxxxxxxxxxxx";

WiFiClient client;

void setup() {
Serial.begin(115200);
delay(100);
pinMode (D1, OUTPUT);
digitalWrite(D1, LOW);

// We start by connecting to a WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
Serial.print("Netmask: ");
Serial.println(WiFi.subnetMask());
Serial.print("Gateway: ");
Serial.println(WiFi.gatewayIP());
ThingSpeak.begin(client);
}
void loop() {
//get the last data of the fields
bool led_1 = ThingSpeak.readFloatField(myChannelNumber,1,myWriteAPIKey);

Serial.print("led1=");
Serial.println(led_1);

if(led_1 == 1){
digitalWrite(D1,HIGH);

Serial.println("D1 is On..!");
delay(10000); //delay 10sec
ThingSpeak.writeField(myChannelNumber, 1, 0,myWriteAPIKey);
}
if(led_1==0){
digitalWrite(D1,LOW);
}
}