High CPU remains after building finishes (macOS High Sierra)

When the Java autobuild setting is enabled, even after the build finishes, the CPU remains high (2 to 3 cores at 100% on a 8 HT core system) for the java process, even after a few minutes, and without making any code changes (or even touching the VSCode during that period). Disabling auto-build ("java.autobuild.enabled":false) and restarting VSCode, then manually building, the CPU usage returns to close to idle after the build completes (which is what is expected).

Environment

• Operating System: macOD High Sierra 10.13.5 (MacBook Pro retina mid-2012)
• JDK version: 8.0_131
• Visual Studio Code version: 1.25.0
• Java extension version: 0.3.0

Steps To Reproduce

1. On a Mac start up VSCode and make sure java.autobuild.enabled:true (default)
2. Load up a Maven project
3. Let it build automatically; when the build finishes, monitor the CPU usage for the "java" named process.

Current Result

CPU usage remains high and doesn't seem to come down even after a few minutes

Expected Result

CPU usage to come close to idle after build completes

Additional Informations

The only java program running at that time is the plugin:

$ jps -v
18472 Jps -Dapplication.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home -Xms8m
18346 org.eclipse.equinox.launcher_1.5.100.v20180611-1436.jar -Declipse.application=org.eclipse.jdt.ls.core.id1 -Dosgi.bundles.defaultStartLevel=4 -Declipse.product=org.eclipse.jdt.ls.core.product -Xverify:none -Xmx1G -XX:+UseG1GC -XX:+UseStringDeduplication

server.log
Process Sample of java.txt

首先查看 server.log 和 Process Sample of java.txt，然后在 VS Code 中的 Maven 项目上启用 java.autobuild.enabled 以重现报告。比较自动构建和手动构建后的 Java 进程；完成的标准是自动构建完成后，在代码未发生更改的情况下 CPU 恢复到接近空闲状态。