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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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group=org.apache.kafka
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# NOTE: When you change this version number, you should also make sure to update
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# the version numbers in
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# - docs/js/templateData.js
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# - tests/kafkatest/__init__.py
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# - tests/kafkatest/version.py (variable DEV_VERSION)
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# - kafka-merge-pr.py
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version=2.7.0-SNAPSHOT
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scalaVersion=2.13.3
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task=build
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MINOR: Update to Gradle 6.5 and tweak build jvm config (#8751)
Gradle 6.5 includes a fix for https://github.com/gradle/gradle/pull/12866, which
affects the performance of Scala compilation.
I profiled the scalac build with async profiler and 54% of the time was on GC
even after the Gradle upgrade (it was more than 60% before), so I switched to
the throughput GC (GC latency is less important for batch builds) and it
was reduced to 38%.
I also centralized the jvm configuration in `build.gradle` and simplified it a bit
by removing the minHeapSize configuration from the test tasks.
On my desktop, the time to execute clean builds with no cached Gradle daemon
was reduced from 127 seconds to 97 seconds. With a cached daemon, it was
reduced from 120 seconds to 88 seconds. The performance regression when
we upgraded to Gradle 6.x was 27 seconds with a cached daemon
(https://github.com/apache/kafka/pull/7677#issuecomment-616271179), so it
should be fixed now.
Gradle 6.4 with no cached daemon:
```
BUILD SUCCESSFUL in 2m 7s
115 actionable tasks: 112 executed, 3 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.15s user 0.12s system 0% cpu 2:08.06 total
```
Gradle 6.4 with cached daemon:
```
BUILD SUCCESSFUL in 2m 0s
115 actionable tasks: 111 executed, 4 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 0.95s user 0.10s system 0% cpu 2:01.42 total
```
Gradle 6.5 with no cached daemon:
```
BUILD SUCCESSFUL in 1m 46s
115 actionable tasks: 111 executed, 4 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.27s user 0.12s system 1% cpu 1:47.71 total
```
Gradle 6.5 with cached daemon:
```
BUILD SUCCESSFUL in 1m 37s
115 actionable tasks: 111 executed, 4 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.02s user 0.10s system 1% cpu 1:38.31 total
```
This PR with no cached Gradle daemon:
```
BUILD SUCCESSFUL in 1m 37s
115 actionable tasks: 81 executed, 34 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.27s user 0.10s system 1% cpu 1:38.70 total
```
This PR with cached Gradle daemon:
```
BUILD SUCCESSFUL in 1m 28s
115 actionable tasks: 111 executed, 4 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.02s user 0.10s system 1% cpu 1:29.35 total
```
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>, Chia-Ping Tsai <chia7712@gmail.com>
5 years ago
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org.gradle.jvmargs=-Xmx2g -Xss4m -XX:+UseParallelGC
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