[ https://issues.apache.org/jira/browse/SPARK-31168?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dongjoon Hyun updated SPARK-31168: ---------------------------------- Affects Version/s: (was: 3.1.0) 3.2.0 > Upgrade Scala to 2.12.13 > ------------------------ > > Key: SPARK-31168 > URL: https://issues.apache.org/jira/browse/SPARK-31168 > Project: Spark > Issue Type: Improvement > Components: Build > Affects Versions: 3.2.0 > Reporter: Yuming Wang > Priority: Major > > h2. Highlights > * Performance improvements in the collections library: algorithmic > improvements and changes to avoid unnecessary allocations ([list of > PRs|https://github.com/scala/scala/pulls?q=is%3Apr+milestone%3A2.12.11+is%3Aclosed+sort%3Acreated-desc+label%3Alibrary%3Acollections+label%3Aperformance]) > * Performance improvements in the compiler ([list of > PRs|https://github.com/scala/scala/pulls?q=is%3Apr+milestone%3A2.12.11+is%3Aclosed+sort%3Acreated-desc+-label%3Alibrary%3Acollections+label%3Aperformance+], > minor [effects in our > benchmarks|https://scala-ci.typesafe.com/grafana/dashboard/db/scala-benchmark?orgId=1&from=1567985515850&to=1584355915694&var-branch=2.12.x&var-source=All&var-bench=HotScalacBenchmark.compile&var-host=scalabench@scalabench@]) > * Improvements to {{-Yrepl-class-based}}, an alternative internal REPL > encoding that avoids deadlocks (details on > [#8712|https://github.com/scala/scala/pull/8712]) > * A new {{-Yrepl-use-magic-imports}} flag that avoids deep class nesting in > the REPL, which can lead to deteriorating performance in long sessions > ([#8576|https://github.com/scala/scala/pull/8576]) > * Fix some {{toX}} methods that could expose the underlying mutability of a > {{ListBuffer}}-generated collection > ([#8674|https://github.com/scala/scala/pull/8674]) > h3. JDK 9+ support > * ASM was upgraded to 7.3.1, allowing the optimizer to run on JDK 13+ > ([#8676|https://github.com/scala/scala/pull/8676]) > * {{:javap}} in the REPL now works on JDK 9+ > ([#8400|https://github.com/scala/scala/pull/8400]) > h3. Other changes > * Support new labels for creating durations for consistency: > {{Duration("1m")}}, {{Duration("3 hrs")}} > ([#8325|https://github.com/scala/scala/pull/8325], > [#8450|https://github.com/scala/scala/pull/8450]) > * Fix memory leak in runtime reflection's {{TypeTag}} caches > ([#8470|https://github.com/scala/scala/pull/8470]) and some thread safety > issues in runtime reflection > ([#8433|https://github.com/scala/scala/pull/8433]) > * When using compiler plugins, the ordering of compiler phases may change > due to [#8427|https://github.com/scala/scala/pull/8427] > For more details, see [https://github.com/scala/scala/releases/tag/v2.12.11]. > -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org