int i=1;
int maxv=10240;
int value[10240];
int deb, fin;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(250000); //serial initialisation
  for (i=0 ; i<maxv ; i++){
    value[i]=i;
  }
  delay(200);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("starti"); //flag
  deb=micros();
  for (i=0 ; i<maxv ; i++) { // sending loop
      Serial.println(value[i]);
  }
  fin=micros();
  Serial.println("stopi");
  Serial.println((fin-deb)/1000000.0);
  delay(2000); //waiting
}

import numpy as np
import serial
ser = serial.Serial('/dev/ttyACM0', 250000)

value=np.empty(10240)

temp=ser.readline()

while temp!='startirn': #search for the flag
    temp=ser.readline()

for j in range(10240):
    value[j]=int(ser.readline())

ser.readline()

time=float(ser.readline())
print time

import time
import numpy as np

value=np.empty(10240)

deb1 = time.clock()

for j in range(10240):
    value[j]=j

fin1= time.clock()
print fin1-deb1