More efficient JSON validation with smaller buffers

Author: plokhotnyuk

jsoniter-scala-examples/README.md

@@ -137,7 +137,7 @@ No GC options are used to speed up JSON validation for all supported builds.
 ```sh
 scala-cli --power package --assembly example02.sc --force -o example02.jar
 ls -l ./example02.jar
-time ./example02.jar -J-XX:+UnlockExperimentalVMOptions -J-XX:+UseEpsilonGC -J-Xms16m -J-Xmx16m -J-XX:+AlwaysPreTouch < test.json 2> /dev/null
+time ./example02.jar -J-XX:+UnlockExperimentalVMOptions -J-XX:+UseEpsilonGC -J-Xms8m -J-Xmx8m -J-XX:+AlwaysPreTouch < test.json 2> /dev/null
 ```
 Expected output:
 ```text

jsoniter-scala-examples/example02.sc

@@ -47,7 +47,6 @@ val jsonCodec: JsonValueCodec[Unit] = new JsonValueCodec[Unit] {
   }
 }
 
-val config = ReaderConfig.withPreferredBufSize(1024 * 1024).withPreferredCharBufSize(1024 * 1024)
-try readFromStream(System.in, config)(jsonCodec) catch {
+try readFromStream(System.in)(jsonCodec) catch {
   case ex: Throwable => ex.printStackTrace(System.err)
 }