benchmark.parse-ratio: adding a ratio parse benchmark.

extra/benchmark/parse-ratio/parse-ratio.factor

@@ -0,0 +1,15 @@
+USING: kernel literals math.parser math.vectors random
+sequences ;
+IN: benchmark.parse-ratio
+
+CONSTANT: test-ratios $[
+    200,000 100,000 random-integers
+    200,000 1,000 random-integers 1 v+n v/
+]
+
+: parse-ratio-benchmark ( -- )
+    test-ratios [
+        [ number>string string>number ] [ assert= ] bi
+    ] each ;
+
+MAIN: parse-ratio-benchmark