import java.time.Instant;

import java.time.LocalDateTime;

import java.time.ZoneId;

import java.time.format.DateTimeFormatter;

import java.util.Random;

public class TimestampPerformanceTest {

public static void main(String[] args) {

int iterations = 1000000;

long startTime, endTime;

// Test 1: Instant (recommended for most cases)

startTime = System.nanoTime();

for (int i = 0; i < iterations; i++) {

Instant instant = Instant.now(); // Get current instant

}

endTime = System.nanoTime();

long instantTime = endTime - startTime;

System.out.println("Instant Time: " + instantTime + " ns");

// Test 2: LocalDateTime (with timezone)

startTime = System.nanoTime();

for (int i = 0; i < iterations; i++) {

LocalDateTime now = LocalDateTime.now();

}

endTime = System.nanoTime();

long localDateTimeTime = endTime - startTime;

System.out.println("LocalDateTime Time: " + localDateTimeTime + " ns");

// Test 3: LocalDateTime (with explicit timezone)

startTime = System.nanoTime();

for (int i = 0; i < iterations; i++) {

ZoneId zoneId = ZoneId.of("America/Los_Angeles"); // Example timezone

LocalDateTime nowWithZone = LocalDateTime.now(zoneId);

}

endTime = System.nanoTime();

long localDateTimeWithZoneTime = endTime - startTime;

System.out.println("LocalDateTime with Zone Time: " + localDateTimeWithZoneTime + " ns");

//Test 4: Formatting timestamps

startTime = System.nanoTime();

for(int i = 0; i < iterations; i++){

LocalDateTime now = LocalDateTime.now();

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

String formattedDateTime = now.format(formatter);

}

endTime = System.nanoTime();

long formattingTime = endTime - startTime;

System.out.println("Formatting Time: " + formattingTime + " ns");

}

}