fix: replace string length calls with counter in map_string benchmarks across all languages

test/benchmark/map_string.lua

@@ -80,9 +80,10 @@ end
 local start = os.clock()
 
 local map = {}
-
+local i = 0
 for _, key in ipairs(keys) do
-  map[key] = string.len(key)
+  map[key] = i
+  i = i + 1
 end
 
 local sum = 0

test/benchmark/map_string.py

@@ -81,9 +81,10 @@ for animal in animals:
 start = time.clock()
 
 map = {}
-
+i = 0
 for key in keys:
-  map[key] = len(key)
+  map[key] = i
+  i += 1
 
 sum = 0
 for key in keys:

test/benchmark/map_string.rb

@@ -80,9 +80,10 @@ end
 start = Time.now
 
 map = Hash.new
-
+i = 0
 for key in keys
-  map[key] = key.length
+  map[key] = i
+  i += 1
 end
 
 sum = 0

test/benchmark/map_string.wren

@@ -81,8 +81,10 @@ var start = IO.clock
 
 var map = {}
 
+var i = 0
 for (key in keys) {
-  map[key] = key.count
+  map[key] = i
+  i = i + 1
 }
 
 var sum = 0