[benchmark] TwoSum Legacy Factor

Author: palimondo

benchmark/single-source/TwoSum.swift

@@ -17,7 +17,8 @@ import TestsUtils
 public let TwoSum = BenchmarkInfo(
   name: "TwoSum",
   runFunction: run_TwoSum,
-  tags: [.validation, .api, .Dictionary, .Array, .algorithm])
+  tags: [.validation, .api, .Dictionary, .Array, .algorithm],
+  legacyFactor: 2)
 
 let array = [
   959,  81, 670, 727, 416, 171, 401, 398, 707, 596, 200,   9, 414,  98,  43,
@@ -61,7 +62,7 @@ public func run_TwoSum(_ N: Int) {
   var i1: Int?
   var i2: Int?
   var Dict: Dictionary<Int, Int> = [:]
-  for _ in 1...2*N {
+  for _ in 1...N {
     for Sum in 500..<600 {
       Dict = [:]
       i1 = nil