Sending data to a server with ESP8266

[Setrik_aZ]

Hi!
I want to read the XYZ angle of an MPU6050 sensor and send these three numbers to a server as fast as possible.
I have tried the ESP8266WiFi library basic HTTP client example and I was able to send a get command and receive a response from the server. but once I import the example codes to my main code (reading the sensor data), the speed of the ESP reading the data will decrease noticeably, even if I change the reading intervals from 10ms to 150ms, I still get data every 1 or 2 seconds. note that I haven't sent any data to the server yet, and it's still the same "send get, receive OK" in the example.
I don't know if my approach is completely wrong or if I'm doing something wrong along the way.
I would also like to know if there are other libraries that could do this task for me.
anyway, here's my code:

1- the HTTPClient example just in case you want to read it:

/**
   BasicHTTPClient.ino

    Created on: 24.05.2015

*/

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h>

ESP8266WiFiMulti WiFiMulti;

void setup() {

  Serial.begin(115200);
  // Serial.setDebugOutput(true);

  Serial.println();
  Serial.println();
  Serial.println();

  for (uint8_t t = 4; t > 0; t--) {
    Serial.printf("[SETUP] WAIT %d...\n", t);
    Serial.flush();
    delay(1000);
  }

  WiFi.mode(WIFI_STA);
  WiFiMulti.addAP("MilaFree", "1234567890");
}

void loop() {
  // wait for WiFi connection
  if ((WiFiMulti.run() == WL_CONNECTED)) {

    WiFiClient client;

    HTTPClient http;

    Serial.print("[HTTP] begin...\n");
    if (http.begin(client, "http://xxx.xxx.xxx.xxx:xxxx")) {  // HTTP


      Serial.print("[HTTP] GET...\n");
      // start connection and send HTTP header
      int httpCode = http.GET();

      // httpCode will be negative on error
      if (httpCode > 0) {
        // HTTP header has been send and Server response header has been handled
        Serial.printf("[HTTP] GET... code: %d\n", httpCode);

        // file found at server
        if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY) {
          String payload = http.getString();
          Serial.println(payload);
        }
      } else {
        Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
      }

      http.end();
    } else {
      Serial.println("[HTTP] Unable to connect");
    }
  }

  delay(10000);
}

2- the HTTPClient inserted inside my code that reads the MPU6050 sensor values:

/* Get tilt angles on X and Y, and rotation angle on Z
 * Angles are given in degrees
 * 
 * License: MIT
 */

#include "Wire.h"
#include <MPU6050_light.h>
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h>

ESP8266WiFiMulti WiFiMulti;


MPU6050 mpu(Wire);
unsigned long timer = 0;

void setup() {
  Serial.begin(9600);
  Wire.begin();

  //////////////////////////////    WIFI PART START   ////////////////////////////////////////////
  for (uint8_t t = 4; t > 0; t--) {
    Serial.printf("[SETUP] WAIT %d...\n", t);
    Serial.flush();
    delay(1000);
  }

  WiFi.mode(WIFI_STA);
  WiFiMulti.addAP("Set", "set12801");
  //////////////////////////////    WIFI PART END   ////////////////////////////////////////////

  byte status = mpu.begin();
  Serial.print(F("MPU6050 status: "));
  Serial.println(status);
  while (status != 0) {}  // stop everything if could not connect to MPU6050

  Serial.println(F("Calculating offsets, do not move MPU6050"));
  delay(1000);
  // mpu.upsideDownMounting = true; // uncomment this line if the MPU6050 is mounted upside-down
  mpu.calcOffsets();  // gyro and accelero
  Serial.println("Done!\n");
}

void loop() {
  mpu.update();

  //////////////////////////////    WIFI PART START   ////////////////////////////////////////////
  if ((WiFiMulti.run() == WL_CONNECTED)) {

    WiFiClient client;

    HTTPClient http;

    Serial.print("[HTTP] begin...\n");
    if (http.begin(client, "http://xxx.xxx.xxx.xxx:xxxx")) {  // HTTP


      Serial.print("[HTTP] GET...\n");
      // start connection and send HTTP header
     int httpCode = http.GET();

      // httpCode will be negative on error
      if (httpCode > 0) {
        // HTTP header has been send and Server response header has been handled
        Serial.printf("[HTTP] GET... code: %d\n", httpCode);

        // file found at server
        if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY) {
          String payload = http.getString();
          Serial.println(payload);
        }
      } else {
        Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
      }

      http.end();
    } else {
      Serial.println("[HTTP] Unable to connect");
    }
  }
  //////////////////////////////    WIFI PART END   ////////////////////////////////////////////

 if ((millis() - timer) > 150) {  // print data every 150ms
    Serial.print("X : ");
    Serial.print(mpu.getAngleX());
    Serial.print("\tY : ");
    Serial.print(mpu.getAngleY());
    Serial.print("\tZ : ");
    Serial.println(mpu.getAngleZ());
   timer = millis();
  }

}