Learnitweb

Author: Editorial Team

  • Understanding -XX:+PrintCompilation in the JVM

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    When you run a Java application, the JVM does not immediately compile everything into optimized machine code. Instead, it dynamically profiles, interprets, and JIT-compiles parts of your program based on how frequently they are used. To see exactly what the JVM is compiling, the JVM provides a powerful diagnostic flag: -XX:+PrintCompilation This option prints every…

  • JVM Just-In-Time Compilation (JIT)

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    Java’s performance story is often misunderstood. Many people hear: “Java is interpreted, so it must be slow.” But the truth is far more interesting. The JVM does not behave like a simple interpreter. It is a sophisticated, intelligent, adaptive execution engine capable of learning how your program behaves and optimizing itself continuously. 1. The Initial…

  • What is Bytecode?

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    1. The Java Execution Pipeline: Bytecode is Key The journey from writing human-readable Java code to its execution is a two-step process, designed to provide consistent, reliable performance across diverse hardware. Step A: Compilation When you write code in Java (.java files), it is first processed by the Java Compiler. Step B: Execution When you…

  • Introduction to gRPC

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    gRPC is a high-performance, open-source communication framework designed by Google for efficient communication between distributed systems. It is especially popular in microservices, cloud-native architectures, IoT, and low-latency systems. 1. What is gRPC? gRPC stands for Google Remote Procedure Call. It allows a service running on one machine to directly invoke a method on another machine…

  • Intuition-Based Tutorial on OLS Linear Regression

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    1. Introduction: What Does Linear Regression Try to Achieve? Linear regression is one of the most fundamental tools in statistics and machine learning. Its purpose is simple—but extremely powerful: To model how multiple input variables influence a single output, using a linear equation. This makes it useful in a huge range of fields—economics, finance, engineering,…

  • Introduction to Linear Regression and Intuition

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    Linear regression is one of the most fundamental and widely used algorithms in machine learning. If you are beginning your ML journey, this is the perfect starting point because it teaches you how models learn relationships, make predictions, and optimize accuracy. In this tutorial, we will break down the concepts behind linear regression, understand where…

  • Building Your First LangChain + LangSmith Chat App with OpenAI

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    1. Prerequisites and Setup In the previous video, we: Example .env (already created earlier): 1.1 Required Python packages Make sure your requirements.txt has at least: Then install: ipykernel is needed so Jupyter can run this environment as a kernel. 2. Loading Environment Variables in Python First, we load variables from .env and ensure they’re available…

  • Understanding JVM Just-In-Time (JIT) Compilation

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    1. The JVM Starts as an Interpreter When you start your Java application, the JVM initially behaves like a classic interpreter: This approach offers an important benefit: Write Once, Run Anywhere Your Java bytecode runs on any platform with a JVM implementation — Windows, macOS, Linux, and more. However, there’s a drawback: Interpreted execution is…

  • How the JVM Runs Your Code

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    What exactly does the JVM do when it runs our code? Most developers know that Java is a compiled language—yet not compiled in the same sense as C or C++.Instead, Java follows a unique two-step model: Understanding this lifecycle is essential because every optimization, performance decision, and runtime behavior in Java flows from this model.…

  • JDK Vendors and JVM Implementations

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    Java is one of the world’s most widely used technologies, and with its growth has come a rich ecosystem of multiple JDK vendors and multiple JVM implementations.Understanding the differences among them is essential, especially when you’re tuning performance, deploying to production, or choosing a runtime for long-term stability. Part 1: JDK Vendors — Oracle vs…