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77. Date
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package com.diguage.truman;
import org.apache.commons.lang3.time.FastDateFormat;
import org.joda.time.format.DateTimeFormat;
import org.openjdk.jmh.annotations.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.concurrent.TimeUnit;
import static com.diguage.truman.DateFormatTest.DateFormatUtils.yyyyMMdd;
@BenchmarkMode(Mode.Throughput)
@Measurement(iterations = 3, time = 5, timeUnit = TimeUnit.SECONDS)
@OutputTimeUnit(TimeUnit.SECONDS)
@Warmup(iterations = 3, time = 5)
@Fork(1)
@Threads(8)
public class DateFormatTest {
private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern(yyyyMMdd);
private static final FastDateFormat fastFormat = FastDateFormat.getInstance(yyyyMMdd);
private static final org.joda.time.format.DateTimeFormatter
jodaFormat = DateTimeFormat.forPattern(yyyyMMdd);
@Benchmark
public String testSimpleDateFormat() {
SimpleDateFormat format = new SimpleDateFormat(yyyyMMdd);
return format.format(new Date());
}
@Benchmark
public String testLocalSimpleDateFormat() {
return DateFormatUtils.formatDate(new Date());
}
@Benchmark
public String testVariaFormatter() {
LocalDateTime now = LocalDateTime.now();
return now.format(DateTimeFormatter.ofPattern(yyyyMMdd));
}
@Benchmark
public String testConstFormatter() {
LocalDateTime now = LocalDateTime.now();
return now.format(formatter);
}
@Benchmark
public String testConstFormatterDate() {
Date date = new Date();
LocalDateTime now = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
return now.format(formatter);
}
@Benchmark
public String testConstFormatterDateZ() {
Date date = new Date();
ZonedDateTime now = ZonedDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
return now.format(formatter);
}
@Benchmark
public String testVariaFastDateFormat() {
FastDateFormat format = FastDateFormat.getInstance(yyyyMMdd);
return format.format(new Date());
}
@Benchmark
public String testConstFastDateFormat() {
return fastFormat.format(new Date());
}
@Benchmark
public String testJodaFormat() {
org.joda.time.LocalDateTime now = org.joda.time.LocalDateTime.fromDateFields(new Date());
return jodaFormat.print(now);
}
public static class DateFormatUtils {
public static final String yyyyMMdd = "yyyyMMdd";
private static ThreadLocal<DateFormat> dateFormatThreadLocal
= ThreadLocal.withInitial(() -> new SimpleDateFormat(yyyyMMdd));
public static String formatDate(Date date) {
return dateFormatThreadLocal.get().format(date);
}
}
}