Accelerate is p fast

AcceleratePerfTests.swift

import Accelerate
import XCTest
@testable import accelerateperftest

class AcceleratePerfTests: XCTestCase {

  let values = Array<Float>(repeating: 0.25, count: 5000000)

    override func setUpWithError() throws {
      // Put setup code here. This method is called before the invocation of each test method in the class.
    }

    override func tearDownWithError() throws {
      // Put teardown code here. This method is called after the invocation of each test method in the class.
    }

  func testMap() throws {
    self.measure {
      let newValues = values.map { (value) -> Float in
        return value * 40.0
      }
    }
  }

  func testFor() throws {
    self.measure {
      var newValues = Array<Float>(values)
      for i in 0..<newValues.count {
        newValues[i] = values[i] * 40.0
      }
    }
  }

  func testAccelerate() throws {
    self.measure {
      var newValues = Array<Float>(values)
      var mul = Float(40.0)
      vDSP_vsmul(values, 1, &mul, &newValues, 1, vDSP_Length(values.count))
    }
  }

}