Refactor benchmarks for BigInts & BigDecimals to work with up to 128-bit numbers

Author: plokhotnyuk

benchmark/src/main/scala/com/github/plokhotnyuk/jsoniter_scala/macros/ArrayOfBigDecimalsBenchmark.scala

@@ -14,8 +14,8 @@ import play.api.libs.json.Json
 class ArrayOfBigDecimalsBenchmark extends CommonParams {
   val sourceObj: Array[BigDecimal] = (1 to 128).map { i =>
     //FIXME | 1 is used to hide JDK bug of serialization redundant 0 after .
-    BigDecimal(BigInt(Array.fill((i & 31) + 1)((i | 1).toByte)), i % 32)
-  }.toArray // up to 256-bit numbers
+    BigDecimal(BigInt(Array.fill((i & 15) + 1)((i | 1).toByte)), i % 37)
+  }.toArray // up to 128-bit numbers for unscaledVal and up to 37-digit (~127 bits) scale
   val jsonString: String = sourceObj.mkString("[", ",", "]")
   val jsonBytes: Array[Byte] = jsonString.getBytes
 

benchmark/src/main/scala/com/github/plokhotnyuk/jsoniter_scala/macros/ArrayOfBigIntsBenchmark.scala

@@ -12,7 +12,7 @@ import io.circe.parser._
 import org.openjdk.jmh.annotations.Benchmark
 
 class ArrayOfBigIntsBenchmark extends CommonParams {
-  val obj: Array[BigInt] = (1 to 128).map(i => BigInt(Array.fill((i & 31) + 1)(i.toByte))).toArray // up to 256-bit numbers
+  val obj: Array[BigInt] = (1 to 128).map(i => BigInt(Array.fill((i & 15) + 1)(i.toByte))).toArray // up to 128-bit numbers
   val jsonString: String = obj.map(x => new java.math.BigDecimal(x.bigInteger).toPlainString).mkString("[", ",", "]")
   val jsonBytes: Array[Byte] = jsonString.getBytes