On Wed, 9 Aug 2023 22:54:28 GMT, Pavel Rappo <pra...@openjdk.org> wrote:
>> Please review this PR to use modern APIs and language features to simplify >> equals, hashCode, and compareTo for BigInteger. If you have any performance >> concerns, please raise them. >> >> This PR is cherry-picked from a bigger, not-yet-published PR, to test the >> waters. That latter PR will be published soon. > > Pavel Rappo has updated the pull request with a new target base due to a > merge or a rebase. The incremental webrev excludes the unrelated changes > brought in by the merge/rebase. The pull request contains 13 additional > commits since the last revision: > > - Fix bugs in Shared.createSingle > - Merge branch 'master' into 8310813 > - Group params coarser (suggested by @cl4es) > > - Splits 20 params into 3 groups: (S)mall, (M)edium and (L)arge. > Every testXYZ method invokes M operations, where M is the maximum > number of elements in a group. Shorter groups are cyclically padded. > - Uses the org.openjdk.jmh.infra.Blackhole API and increases > benchmark time. > - Fixes a bug in Shared that precluded 0 from being in a pair. > - Use better overloads (suggested by @cl4es) > > - Uses simpler, more suitable overloads for the subrange > starting from 0 > - Improve benchmarks > - Merge branch 'master' into 8310813 > - Restore hash code values > > BigInteger is old and ubiquitous enough so that there might be > inadvertent dependencies on its hash code. > > This commit also includes a test, to make sure hash code is > unchanged. > - Merge branch 'master' into 8310813 > - Add a benchmark > - Merge branch 'master' into 8310813 > - ... and 3 more: https://git.openjdk.org/jdk/compare/16b32b66...6fa3f694 Here's a status update for this PR. I'm currently benchmarking baseline against this PR and this PR plus changes in https://github.com/openjdk/jdk/pull/15197. It's a 3-way benchmark, so to speak. Its purpose is to see whether performance degradation brought by this PR to `equals` and `compareTo` can be sufficiently offset by the improved `ArraysSupport.mismatch` mechanics. ------------- PR Comment: https://git.openjdk.org/jdk/pull/14630#issuecomment-1673056244
