Add benchmarks.

Author: treeform

tests/bench.nim

@@ -0,0 +1,36 @@
+import benchy, random, json, jsony, eminim, streams, jsutils/jsons
+
+type Node = ref object
+  kind: string
+  name: string
+  id: int
+  kids: seq[Node]
+
+var r = initRand(2020)
+var genId: int
+proc genTree(depth: int): Node =
+  result = Node()
+  result.id = genId
+  inc genId
+  result.name = "node" & $result.id
+  result.kind = "NODE"
+  if depth > 0:
+    for i in 0 .. r.rand(0..3):
+      result.kids.add genTree(depth - 1)
+
+var tree = genTree(10)
+var treeStr = pretty %tree
+
+echo genId, " node tree:"
+
+timeIt "treeform/jsony":
+  keep jsony.fromJson[Node](treeStr)
+
+timeIt "nim std/json":
+  keep parseJson(treeStr).to(Node)
+
+timeIt "treeform/jsutils/jsons":
+  keep jsons.fromJson(parseJson(treeStr), Node)
+
+timeIt "planetis-m/eminim":
+  keep newStringStream(treeStr).jsonTo(Node)