add jpaper bench for v0

bench/README.md

@@ -0,0 +1,38 @@
+# Timings
+
+all benches use the uncompressed .json from disk
+
+all done with the "cool an breezy copy" preset
+
+note: the .json is not a perfect fit, bc it is not designed for the Yjs algo (missing parent_right and ids are not perfect)
+
+the json contains:
+	doc size (with tombstones): 182315
+	doc size: 104852
+	total inserts: 182315
+	total deletes: 77463
+	total ops: 259778
+
+## baseline ( just walking through the json, no insertions )
+
+- g++9 -g :
+	- 23.0s
+	- 22.6s
+	- 23.0s
+
+- g++9 -O3 -DNDEBUG :
+	- 9.6s
+	- 9.7s
+	- 9.7s
+
+
+## version0
+
+- g++9 -g -O2 :
+	- 10m35s
+
+- g++9 -O3 -DNDEBUG :
+	- 8m7s
+
+## version1
+