| //===--- LazyFilter.swift -------------------------------------------------===// |
| // |
| // This source file is part of the Swift.org open source project |
| // |
| // Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors |
| // Licensed under Apache License v2.0 with Runtime Library Exception |
| // |
| // See https://swift.org/LICENSE.txt for license information |
| // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // This test checks performance of creating an array from lazily filtered |
| // collections. |
| import TestsUtils |
| |
| @inline(never) |
| public func run_LazilyFilteredRange(_ N: Int) { |
| var res = 123 |
| let c = (1..<1_000_000).lazy.filter { $0 % 7 == 0 } |
| for _ in 1...N { |
| res += Array(c).count |
| res -= Array(c).count |
| } |
| CheckResults(res == 123) |
| } |
| |
| @inline(never) |
| public func run_LazilyFilteredArrays(_ N: Int) { |
| var res = 123 |
| let c = (1..<1_000_000).map({[$0]}).lazy.filter { $0.first! % 7 == 0 } |
| for _ in 1...N { |
| res += Array(c).count |
| res -= Array(c).count |
| } |
| CheckResults(res == 123) |
| } |
| |
