serkan-ozal

void cleanThreadLocalsOfCurrentThread() {
   try {
      // Get a reference to the thread locals table of the current thread
      Thread thread = Thread.currentThread();
      Field threadLocalsField = Thread.class.getDeclaredField("threadLocals");
      threadLocalsField.setAccessible(true);
      Object threadLocalTable = threadLocalsField.get(thread);

      // Get a reference to the array holding the thread local variables inside the 
      // ThreadLocalMap of the current thread

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Runtime	JDK 21, Java HotSpot(TM) 64-Bit Server VM, 21+35-LTS-2513
Benchmark tool	JMH (version 1.37)
Benchmark mode	Throughput, ops/time
Warmup iteration	3
Warmup time	5 seconds (for each warmup iteration)
Measurement iteration	10
Measurement time	30 seconds (for each measurement iteration)
Vector length	1000

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Algorithm / OS	Ubuntu	Window	MacOS
Dot Product	750,622.625 ops/s	760,163.774 ops/s	961,366.490 ops/s
Cosine Similarity	586,113.920 ops/s	705,148.739 ops/s	892,124.358 ops/s
Manhattan Distance	793,538.457 ops/s	717,150.911 ops/s	1,156,442.603 ops/s
Euclidean Distance	760,819.826 ops/s	748,286.320 ops/s	1,012,210.232 ops/s

serkan-ozal

serkan-ozal

Runner	OS	Processor (CPU)	Memory (RAM)
ubuntu-latest	Ubuntu - 22.04	- Model: Intel Xeon E5-2673 v4 @ 2.30GHz - # of cores: 2	7 GB
windows-latest	Windows - 2022	- Model: Xeon® Platinum 8272CL - # of cores: 2	7 GB
macos-latest	MacOS - 12	- Model: Intel Xeon E5-1650 v2 @ 3.50GHz - # of cores: 3	14 GB

serkan-ozal

const AWS = require('aws-sdk');
const dynamodb = new AWS.DynamoDB();

exports.hello = async (event, context) => {
  const promises = [];
  for (let i = 0; i < 1000; i++) {
    const params = {
        TableName: 'books',
        Item: {
            'id': {S: i.toString()},

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import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonStreamContext;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
import com.fasterxml.jackson.databind.ser.PropertyWriter;
import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter;
import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider;
import com.fasterxml.jackson.databind.type.*;

serkan-ozal

How to setup AWS lambda function to talk to the internet and VPC

I'm going to walk you through the steps for setting up a AWS Lambda to talk to the internet and a VPC. Let's dive in.

So it might be really unintuitive at first but lambda functions have three states.

1. No VPC, where it can talk openly to the web, but can't talk to any of your AWS services.
2. VPC, the default setting where the lambda function can talk to your AWS services but can't talk to the web.
3. VPC with NAT, The best of both worlds, AWS services and web.

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/**
 * @author SERKAN OZAL
 *         
 *         E-Mail: <a href="mailto:serkanozal86@hotmail.com">serkanozal86@hotmail.com</a>
 *         GitHub: <a>https://github.com/serkan-ozal</a>
 */

#include <jni.h>
#include "tr_com_serkanozal_jvm_playground_MemoryUtil.h"

serkan-ozal

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.lang.reflect.Field;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Enumeration;
import java.util.List;