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Tagir Valeev amaembo

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amaembo / CharsTest.java
Created June 27, 2015 02:19
CharsTest: comparison of different ways to create the stream of chars from String
import java.util.concurrent.TimeUnit;
import java.util.stream.*;
import java.util.*;
import java.nio.*;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.annotations.*;
@Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@amaembo
amaembo / MegamorphTest.java
Last active August 29, 2015 14:24
package org.sample;
import java.util.*;
import java.util.concurrent.TimeUnit;
import java.util.stream.*;
import java.util.function.*;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.annotations.*;
@amaembo
amaembo / Limit.java
Last active August 29, 2015 14:24
import java.util.*;
import java.util.stream.*;
import static java.util.stream.Collectors.*;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.annotations.*;
@Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@amaembo
amaembo / IteratorTest.java
Last active August 29, 2015 14:24
Unknown size iterator optimization
package org.sample;
import java.util.concurrent.TimeUnit;
import java.util.stream.*;
import java.util.function.*;
import java.util.*;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.annotations.*;
@amaembo
amaembo / ConstantSpliterator.java
Last active August 29, 2015 14:26
import java.util.Spliterator;
import java.util.Objects;
import java.util.function.Consumer;
class ConstantSpliterator<T> implements Spliterator<T> {
long remaining;
T value;
public ConstantSpliterator(long remaining, T value) {
this.remaining = remaining;
@amaembo
amaembo / MyBenchmark.java
Last active August 29, 2015 14:26
Comment on http://www.javacodegeeks.com/2015/07/java-performance-tutorial-how-fast-are-the-java-8-streams.html
import java.util.*;
import java.util.stream.*;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.annotations.*;
@Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@BenchmarkMode(Mode.AverageTime)
@amaembo
amaembo / AvgTest.java
Last active August 29, 2015 14:27
import static java.util.concurrent.TimeUnit.*;
import static java.util.stream.Collectors.*;
import java.util.*;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.annotations.*;
@Warmup(iterations = 5, time = 1, timeUnit = SECONDS)
@Measurement(iterations = 15, time = 1, timeUnit = SECONDS)
@BenchmarkMode(Mode.AverageTime)
@amaembo
amaembo / AverageLong.java
Last active August 29, 2015 14:27
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.MathContext;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.function.ToIntFunction;
import java.util.function.ToLongFunction;
import java.util.stream.Collector;
final class AverageLong {
@amaembo
amaembo / SplitTest.java
Created August 26, 2015 12:50
In reply to http://ru.stackoverflow.com/a/445008/183331
import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.annotations.*;
@Warmup(iterations = 5, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@amaembo
amaembo / collect.java
Created August 30, 2015 10:51
Collect (see http://stackoverflow.com/a/32291089/4856258 )
tokens.stream().collect(() -> new ArrayList<String>(), (l, e) -> {
if(l.isEmpty() || !l.get(l.size()-1).toUpperCase().endsWith("STOP"))
l.add(e);
}, (l1, l2) -> {
if(l1.isEmpty() || !l1.get(l1.size()-1).toUpperCase().endsWith("STOP"))
l1.addAll(l2);
});