Update README.md

Author: sakabug

README.md

@@ -38,4 +38,32 @@ I use long press functionality alot in my codes, so I wanted to add suitable fun
 ### Why this library was made
 Idea was to make fast button library when nothing is pressed so it would affect to the cycle time as little as possible.
 
-Doesn't matter if you have 1 or 18 buttons, update() takes between 3100-3250 microseconds per 1000 update on unpressed buttons -> 3us per loop.
+Doesn't matter if you have 1 or 18 buttons, update() takes between 3100-3250 microseconds per 1000 update on unpressed buttons -> 3us per loop
+
+**Measuring time is useless in itself, because just storing micros into uint8_t/uint16_t/uint32_t will affect time differently, but for mere comparison versus other libraries I used:**
+```
+#include <Bugtton.h>
+
+const uint8_t buttonCount = 5;
+const uint8_t buttonPins[buttonCount] = {2,3,4,5,6};
+Bugtton buttons(buttonCount, buttonPins, INPUT_PULLUP, 25);
+
+uint32_t t1,t2;
+uint16_t count1 = 0;
+uint16_t amount = 1000;
+
+void setup() {
+    Serial.begin(57600);
+    t1 = micros();
+}
+
+void loop() {
+    buttons.update();
+    count1++;
+    if (count1 == amount){
+        t2 = micros();
+        Serial.println(t2-t1);
+        for(;;);
+    }  
+}
+```