bench: always use Buffer for JSON stuff

Author: gfx

Makefile

@@ -31,7 +31,7 @@ profile-decode:
 		node --prof-process --preprocess -j isolate-*.log | npx flamebearer
 
 benchmark:
-	npx ts-node benchmark/benchmark-from-msgpack-lite.ts
+	npx node -r ts-node/register benchmark/benchmark-from-msgpack-lite.ts
 	@echo
 	node benchmark/msgpack-benchmark.js
 

benchmark/benchmark-from-msgpack-lite.ts

@@ -42,8 +42,7 @@ var buf, obj;
 
 if (JSON) {
   buf = bench('buf = Buffer.from(JSON.stringify(obj));', JSON_stringify, data);
-  buf = bench('buf = JSON.stringify(obj);', JSON.stringify, data);
-  obj = bench('obj = JSON.parse(buf);', JSON.parse, buf);
+  obj = bench('obj = JSON.parse(buf.toString("utf-8"));', JSON_parse, buf);
   runTest(obj);
 }
 
@@ -100,10 +99,14 @@ if (notepack) {
   runTest(obj);
 }
 
-function JSON_stringify(src: any) {
+function JSON_stringify(src: any): Buffer {
   return Buffer.from(JSON.stringify(src));
 }
 
+function JSON_parse(json: Buffer): any {
+  return JSON.parse(json.toString("utf-8"));
+}
+
 function bench(name: string, func: (...args: any[]) => any, src: any) {
   if (argv.length) {
     var match = argv.filter(function(grep) {