RFR: 8320759: Creation of random BigIntegers can be made faster [v3]

[fabioromano1]

> A faster and simpler way to generate random BigIntegers, avoiding eventually trimming of leading zeros in magnitude array.

fabioromano1 has updated the pull request incrementally with one additional commit since the last revision:

  Create RandomBigIntegers.java
  
  Create a benchmark to measure the performance of BigInteger(int, Random) constructor implementation.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/16817/files
  - new: https://git.openjdk.org/jdk/pull/16817/files/928a13a1..699b51b0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16817&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16817&range=01-02

  Stats: 31 lines in 1 file changed: 31 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/16817.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16817/head:pull/16817

PR: https://git.openjdk.org/jdk/pull/16817