Adafruit SSD1306 I2C text speed test

gistfile1.txt

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);
long I2C_clock=250000;
long pot;

unsigned long thisMicros = 0;
unsigned long lastMicros = 0;

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

        display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
        display.display();
        display.clearDisplay();
        display.setTextSize(2);
        display.setTextColor(WHITE);
}

void loop()
{

        pot=analogRead(5);// pot on A5 to play with the I2C clock
        I2C_clock=map(pot,1023,0,100L,4000L);
        I2C_clock=I2C_clock*1000L;
        Wire.setClock(I2C_clock);

        thisMicros = micros();
        display.clearDisplay();
        display.setCursor(0,0);
        display.print(thisMicros - lastMicros);
        display.setCursor(0,20);
        display.print(I2C_clock);
        display.setCursor(0,40);
        display.print(pot);
        display.display();
        lastMicros = thisMicros;

}