Question

How to allocate 1MB in Swift

Answer 1

import Foundation

// Allocates 1MB of memory = 1,048,576 bytes
var buffer = [UInt8](repeating: 0, count: 1024 * 1024) 

print("Allocated \(buffer.count) bytes.")




/*
run:

Allocated 1048576 bytes.

*/

 

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Answer 2

import Foundation

// Allocates 1MB of memory = 1,048,576 bytes
let pointer = UnsafeMutablePointer<UInt8>.allocate(capacity: 1024 * 1024) 

print("Allocated 1MB of memory using UnsafeMutablePointer.")

pointer.deallocate() // Free memory after use




/*
run:

Allocated 1MB of memory using UnsafeMutablePointer.

*/

 

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Answer 3

import Foundation

// Allocates 1MB of memory = 1,048,576 bytes
let dataBuffer = Data(count: 1024 * 1024)

print("Allocated \(dataBuffer.count) bytes using Data.")



/*
run:

Allocated 1048576 bytes using Data.

*/

 

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