#include "Arduino.h"
//#include <string>
#include <vector>
//#include <esp_system.h> //mem
using namespace std;
std::vector<String>  v_audioContent;

//void vector_clear_and_shrink(deque<String>&vec);

void setup() {
  Serial.begin(115200);
  uint32_t ms = millis();
  Serial.println("BEGIN------------------------");

  mem();
  
for (uint8_t f=0;f<10;f++)
{
  add();
  while (v_audioContent.size() > 0) {
   String s = v_audioContent[0];
    //  Serial.printf("%s\n", s);
    v_audioContent.pop_back();
  }
  mem();
  //if (v_audioContent.size() == 0)
 if (v_audioContent.empty())
    vector_clear_and_shrink(v_audioContent); // free memory
Serial.print("FOR------------------------:");
Serial.println(f);

}

  Serial.println("END deque------------------------");
  mem();
  uint32_t ms2 = millis();
  Serial.print("TIME:"); Serial.println((ms2 - ms) / 10);
}

void loop() {
  delay(1000);
}
//-----------------------------ADD
void add() {
  
  for (int n = 0; n < 1000; n++)
  {
    String nn = String(n);
 v_audioContent.insert(v_audioContent.begin(),nn.c_str());
  }
}
//-----------------------------FREE
void vector_clear_and_shrink(vector<String>&vec)
{
 
 
  vec.clear();
  vec.shrink_to_fit();
 Serial.println("shrink-----------------------");
 mem();
}
//-----------------------------MEM
void mem()
{

  uint32_t freeHeapBytes = heap_caps_get_free_size(MALLOC_CAP_DEFAULT);
  uint32_t totalHeapBytes = heap_caps_get_total_size(MALLOC_CAP_DEFAULT);
  float percentageHeapFree = freeHeapBytes * 100.0f / (float)totalHeapBytes;
  // Print to serial
  Serial.printf("[Memory] %.1f%% free - %d of %d bytes free\n", percentageHeapFree, freeHeapBytes, totalHeapBytes);
  uint32_t Free = ESP.getFreeHeap();
  uint32_t  alloc = ESP.getMaxAllocHeap();
  Serial.print("Free:"); Serial.print(Free);
  Serial.print(" alloc:"); Serial.println(alloc);

}