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why c language is more efficient as compared to high level language like Java Script

C calls are generally more optimized and efficient compared to calls made in higher-level languages due to several factors:

  1. Lower-Level Operations: C is a low-level language that provides fine-grained control over memory and hardware resources. This allows for more direct and efficient manipulation of data and system resources compared to higher-level languages that abstract these details.

  2. Minimal Overhead: C has minimal runtime overhead. Higher-level languages often come with garbage collectors, runtime environments, and other abstractions that introduce additional overhead. In contrast, C compiles to machine code that runs directly on the hardware, leading to faster execution times.

  3. Direct Memory Access: C allows direct access to memory addresses and hardware resources through pointers and low-level operations. This direct access can be more efficient than the managed memory models of higher-level languages, which involve additional layers of indirection and safety checks.

  4. Manual Memory Management: C programmers manage memory manually, which can lead to more efficient memory usage when done correctly. Higher-level languages often use automatic garbage collection, which can introduce unpredictable pauses and overhead.

  5. Optimization by Compilers: C compilers, like GCC and Clang, are highly optimized and have been developed and refined over decades. These compilers can perform advanced optimizations such as inlining functions, loop unrolling, and register allocation, which can significantly improve performance.

  6. System-Level Access: C is often used for system programming, which involves writing code that interacts closely with the operating system and hardware. This system-level access allows for optimizations that are not possible in higher-level languages.

Examples and Illustrations

Example: Function Call Overhead

C Function Call:

#include <stdio.h>

void sayHello() {
    printf("Hello, World!\n");

int main() {
    return 0;

JavaScript Function Call:

function sayHello() {
    console.log("Hello, World!");


Memory Management

C Memory Management:

#include <stdlib.h>

int main() {
    int *arr = (int *)malloc(100 * sizeof(int));
    // Use the array
    return 0;

JavaScript Memory Management:

let arr = new Array(100);
// Use the array
// Garbage collector will automatically free the memory
Published on: Jul 10, 2024, 10:55 AM  


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